Re: [Gimp-user] Stripes in print (Gimp 2.6.7)

[Claus Cyrny]

A. den Oudsten wrote:

Op 08-12-10 15:04, Claus Cyrny schreef:

Hi,

after editing a photograph of a girl
I downloaded for free from Stockvault,
I printed it out at a local drugstore
(on one of those Kodak stations), but
unfortunately the print contained a
pattern of fine stripes. The woman in
the drugstore told be that this must be
due to to file. To test this, I printed
the photograph out at another store of
the same chain, but the stripes were
still present, albeit not as strong as in
the first print.

My question: Did anyone experience this
as well, and what can I do to avoid this in
the future? I really zoomed in on the file
(I'm using Gimp 2.6.7, and my display is
gamma-corrected), but I couldn't detect
any stripes.

The file can be found here:

http://home.arcor.de/ccyrny/images/posing-girl_03_15x20.jpg

Thanks for any recommendations,

Claus

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I see the stripes as well, but also a horizontal shift, as if there 
are two foto's.


The shift is intentional. Regarding the stripes: I found out that this 
is a gamma issue.On my
(gamma-corrected; gamma = 1.0) display the stripes are not visible. If I 
reduce the
gamma to 0.5, the image becomes visibly darker, and then I can see the 
stripes as well.
The Kodak system on which I printed the file has no gamma correction, 
either--thus the
stripes. I made a simple  image file to check the gamma of the Kodak 
system, in order
to find the proper correction value. Then I'm hoping that the stripes 
should disappear.


Thanks to all who responded.

Claus

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[Gimp-user] Stripes in print (Gimp 2.6.7)

[Claus Cyrny]

Hi,

after editing a photograph of a girl
I downloaded for free from Stockvault,
I printed it out at a local drugstore
(on one of those Kodak stations), but
unfortunately the print contained a
pattern of fine stripes. The woman in
the drugstore told be that this must be
due to to file. To test this, I printed
the photograph out at another store of
the same chain, but the stripes were
still present, albeit not as strong as in
the first print.

My question: Did anyone experience this
as well, and what can I do to avoid this in
the future? I really zoomed in on the file
(I'm using Gimp 2.6.7, and my display is
gamma-corrected), but I couldn't detect
any stripes.

The file can be found here:

http://home.arcor.de/ccyrny/images/posing-girl_03_15x20.jpg

Thanks for any recommendations,

Claus

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[Gimp-user] 16-bit - why the long delay?

[Claus Cyrny]

Hi all,

after this has first been announced, I think, in 2002 (!),
I wonder why 16-bit/channel has still not been implemented.
Two years ago (or something like this) I read that 16-bit
would be available in 2.6, but now someone stated that it
would probably take a few more years (!). IMHO, 16-bit
should be right on top of the list of priorities, now that GEGL
has been implemented--at least it's definitely more important
than, say yet another new icon set for Gimp. And anti-aliasing
could also be improved. Programs such as Krita (I'm using
Ubuntu) have much better anti-aliasing. I really enjoy working with
the Gimp (currently 2.6.8), but especially 16-bit is really long overdue.

Claus
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Re: [Gimp-user] Rotate increases PNG size x10 !

[Claus Cyrny]

Chris Mohler wrote:

On Wed, Jun 23, 2010 at 5:30 PM, Leon Brooks
 wrote:
  

If the image is text or something else essentially
monochrome



Or image->mode, bitmap, 1-bit palette should drastically reduce the
file size.  I suspect that the 'line art' setting in xsane is
producing a grayscale image but with each pixel either solid black or
solid white, which would make the resulting PNG easy to compress.


The downside would be that the text is jaggy. If it's just black or gray
text on a white background, I would convert the image to indexed,
with, say 32 colors. For text, this should be enough. My guess is that
the large file is in RGB--thus the big file size.

Claus

P.S.: Is it true that future Gimp versions won't have an indexed
mode anymore?

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Re: [Gimp-user] Command line, PDF resizing & cropping

[Claus Cyrny]

Hi Craig,

On 05/07/2010 05:13 PM, Craig Fairhurst wrote:

Hi

Could anybody tell me if it would be possible to perform actions such 
as PDF resizing and cropping on the command line with GIMP.


I would use ImageMagick for this. This is really an outstanding set of 
tools one can
access via the command line (there's a basic GUI version implemented as 
well, which

can be accessed via the 'display' command).

URL: http://www.imagemagick.org/

HTH,

Claus

P.S.: Just take a look at the 'Usage' 
  section on the IM web site. It's really

amazing what one can do here.

I've used GIMP in the past andhad a brief read over the CLI 
introduction on gimp.org and it would seem to be possible however I 
couldn't find any more information.


If anybody has some example ways of doing this I'd be grateful.

Kind regards


Craig Fairhurst
Call +44 (0)1200 422 533
Fax +44 (0)1200 422 566


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[Gimp-user] PSD as CMYK: Web Coated (SWOP) V2

[Claus Cyrny]

Hi,

I need to provide a business card as PSD/
CMYK: Web Coated (SWOP) V2. How do I
go about there in Gimp 2.6.7 (Ubuntu 9.10)?
I designed the card initially in Inkscape &
will import it into Gimp as a PNG. This is
actually the first time I am using a color profile,
so any tips would be appreciated.

TIA,

Claus


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Re: [Gimp-user] GaGa GIMP example - someone make for demo, by tomorrow, Fri Feb 12 before 4PM, quickly?

[Claus Cyrny]

Here's number of royalty-free images the person in question could
use: http://commons.wikimedia.org/wiki/Category:Lady_Gaga

Claus

giovanni_re wrote:

Hi Akkana, gimp list people, (I don't have time to post to the "gimp
images yahoo group) (but that would be a great place to forward this
message, I think) (& all) - you probably won't remember me, but we've
met, probably at svlug or some other linux related event.

[sending two copies of this message, one to  sv...@lists.svlug.org, one
to gimp-user@lists.XCF.Berkeley.EDU, to avoid crossposting.]

[Hey - gimp-user@lists.XCF.Berkeley.EDU - berkeley, cool - oh yeah, now
I remember, the guy who started GIMP was a berkeley student? & then that
the source of GNOME]


IIRC, you wrote a book about gimp. Last year, when I made a presentation
at the BIL conference, I met a lady who uses the Adobe sw for image
processing - shes a photographer & graphic artist, maybe using a mac. 
She was interested in learning about free sw, linux, & the gimp,  I

think I emailed you about her, or her about your book.

==
Anyway, _tomorrow_, Friday Feb 12, at 4pm, I'm making an intro talk to
BIL people, basically about why they _should_ _want_ to be using
GNU(Linux).
http://m.bilconference.com/ 
http://spreadsheets.google.com/pub?key=tCP0tLUYhz-yPFyv0g5fzNg&single=true&gid=0&output=html


My talk is titled "GaGa for GNU(Linux)", because GNU(Linux) is great, &
something to be gaga about, & cause Lady Gaga is topical. ;)

I have a picture up on the BIL website with me & a friend in it.
http://2010.bilconference.com/2010/02/giovanni-re-gaga-for-gnulinux/
http://2010.bilconference.com/category/speakers/

Here's were you come in: It would be a great demo of the capability of
not only the GNU(Linux) software GIMP, but of the community ability
also, if that photo could be gimped to add in a picture of Lady Gaga.

That is beyond my capabilities (artistically, & learning curve to learn
gimp). I know you wrote a book, so you are a writer. Maybe you are also
a gimp artist. Or, maybe you _know_ a gimp artist.

Could you, or someone you know, gimp my photo, add in Lady Gaga - it
doesn't even have to be "artistic", or "highly realistic" - practically
cut & paste would be fine & wonderfully acceptable, but if someone
wanted to make it look nice - so much the better.  :)

The __Primary__ factor is: it _has_ to be done & available to me before
4PM Friday Feb 12, tomorrow, before my talk.  <8-O  ;)  :)


==  There are 2 sources for lady Gaga images I know of:
 1) google images, & 2) there's a video on youtube that the image
 portion is merely a large # of still pictures of lady gaga.

"Lady Gaga-Poker Face (Original Version)" (that's the file name I have,
3:59 min/sec, vlc video player plays it fine, "Flashgot" (iirc) Firefox
plugin used to download it)

Since this is merely for non commercial, fair use, to demo the
capabilities of both the GIMP sw (and also the GNU(Linux) free sw
community) 's capabilities, I suspect it is fair use to use a commercial
photo for this purpose.

Could you gimp that up?  If not, surely someone (artistically/technical
capable) in the gimp community could. Would you mind gimping that, so I
could show it at my talk as an example for people who are _not_
technical sw people, but are artists, or creative people, to show them
an example of the high capability of GNU(Linux) sw for people who aren't
technical, but are artists/creative type people?

If you couldn't do that, could you pass this request on to a gimp
mailing list, in case someone there could put this example together so I
could present it to the BIL attendees interested in learning what
GNU(Linux) can do for "real people"??


==  What comments, questions do you have for me?

Thanks very much for any thoughts, suggestions, advice you have!  :)

PS, I'll cc this to svlug, where you gave your talk last year, iirc, in
case there is someone there who knows about this & could do it.



==
PS to anyone else who'd like to do this, to help demo the capabilities
of both the GIMP sw, & community:  I invite/encourage you to do this if
you like, & email me the result, so I can demo it at the BIL conference. 


I might even see if it can get put onto the BIL website as a replacement
for the picture up there now.

BTW, that's me in the picture - the person with the beard ;)  .


==  Suggestion for GIMPing Lady Gaga into that image:
About 10-25?% of still images in the video on youtube "Lady Gaga-Poker
Face (Original Version)" (that's the file name I have, 3:59 min/sec, vlc
video player plays it fine, "Flashgot" (iirc) Firefox plugin used to
download it), might be appropriate for this, IMO.

A good pic would be one with not a lot of exposed flesh [ ;) ], nicely
dressed, like my friend in the pic on the BIL speakers site.  Not a
"provocative" picture (for this audience), just something "nice".  Maybe
even an older pic of Stefani Germanotta with dark hair, not blond, so it
matches the hair color of my friend.  Maybe somethin

Re: [Gimp-user] Create web page? (correction)

[Claus Cyrny]

Deniz Dogan wrote:

2010/1/27 Nathan Lane :
  

http://www.W3Schools.com has the most up-to-date tutorials on HTML and CSS,
which are the two technologies you need to learn to achieve the creation of
a decent website, even if it is simple.
Nathan



My "At least I fail to understand that" was actually supposed to be
a comment on the following:


Lots of professional web developers ridicule W3 Schools often, but
it's a good place to find quick (and dirty) information.
  


Claus


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Re: [Gimp-user] Create web page?

[Claus Cyrny]

Nathan Lane wrote:
... Marquee and Font tags are no longer fully supported, and Framesets 
are a bad idea

I absolutely second that! ;-)

(although iframes for certain things are a good idea). Also never use 
tables to lay your website out. A lot of people still do, but I would 
not even consider it a poor-man's-layout, rather it is and always has 
been a terrible idea. Divs were invented specifically for layout of 
websites. Just a heads up. Tables are however good for displaying 
tabular data.


Yep! I strictly separate markup (XHTML) & layout (CSS), and this really 
gives

one great freedom.

> RSA

The following is really absolutely essential (simple, as it may seem):

http://www.w3schools.com/css/css_boxmodel.asp

This model is valid for just about any (X)HTML element. (XHTML is just 
HTML 4.01 with

a few restrictions, in order to make it XML compliant.)

A recommendable resource is the HTML Writers Guild at http://www.hwg.org/.
Those are really nice folks (as on this list ;-).


Just taking a glance around the web, I came across 
this, http://webdesign.about.com/od/tables/a/aa122605.htm, which goes 
over what to use tables for and what tabular data is. About.com is 
always a pretty good source for information, and I trust them on a lot 
of things. While they don't specialize in much of anything I would 
take a look.


http://www.W3Schools.com has the most up-to-date tutorials on HTML and 
CSS, which are the two technologies you need to learn to achieve the 
creation of a decent website, even if it is simple.


Adfter taking a brief glance, at least I fail to understand this.

Claus


Nathan

On Tue, Jan 26, 2010 at 7:53 PM, Claus Cyrny <mailto:claus.cy...@web.de>> wrote:


bigsk...@gmail.com <mailto:bigsk...@gmail.com> wrote:

On 01/26/2010 11:56 AM, Deniz Dogan wrote:
  

2010/1/26 Programmer In Training 
<mailto:p...@joseph-a-nagy-jr.us>:
   


I use a plain text editor. If you're going to be doing any sort of even
half-serious web design, I highly recommend several methods of learning
HTML:

Read the standard available at:
www.w3.org <http://www.w3.org> 
  


In the very beginning, I used this document as a reference:

http://www.lib.tsinghua.edu.cn/chinese/INTERNET/HTML/Table/html_design.html

Claus

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Re: [Gimp-user] Create web page?

[Claus Cyrny]

Claus Cyrny wrote:

bigsk...@gmail.com wrote:

On 01/26/2010 11:56 AM, Deniz Dogan wrote:
  

2010/1/26 Programmer In Training:
   


I use a plain text editor. If you're going to be doing any sort of even
half-serious web design, I highly recommend several methods of learning
HTML:

Read the standard available at:
www.w3.org 
  


In the very beginning, I used this document as a reference:

http://www.lib.tsinghua.edu.cn/chinese/INTERNET/HTML/Table/html_design.html


It is recommended, though, to enclose attributes properly, like

< img width="[value]", instead of < img width=[value].

Claus

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Re: [Gimp-user] Create web page?

[Claus Cyrny]

bigsk...@gmail.com wrote:

On 01/26/2010 11:56 AM, Deniz Dogan wrote:
  

2010/1/26 Programmer In Training:
   


I use a plain text editor. If you're going to be doing any sort of even
half-serious web design, I highly recommend several methods of learning
HTML:

Read the standard available at:
www.w3.org 
  


In the very beginning, I used this document as a reference:

http://www.lib.tsinghua.edu.cn/chinese/INTERNET/HTML/Table/html_design.html

Claus

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Re: [Gimp-user] Create web page?

[Claus Cyrny]

Programmer In Training wrote:

On 1/26/2010 10:56 AM, Deniz Dogan wrote:
  

2010/1/26 Programmer In Training :


I use a plain text editor.

I also write all of the code myself, but I would at least
recommend a text editor which had syntax highlighting.
Under Linux, this is really no problem, but I'm not sure
about Windows or MacOS. I use Bluefish, a HTML/CSS
editor for Linux.

Claus

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Re: [Gimp-user] Create web page?

[Claus Cyrny]

Programmer In Training wrote:

On 1/26/2010 10:56 AM, Deniz Dogan wrote:
  

2010/1/26 Programmer In Training :


I use a plain text editor. If you're going to be doing any sort of even
half-serious web design, I highly recommend several methods of learning
HTML:

Read the standard available at:
www.w3.org

  

It is not a good idea to just jump in and start reading standards and
specifications. I suggest reading a good book about basic modern web
design instead.




I disagree. After teaching myself the basics (by copying work others had
done), reading the standards and specifications jumped my knowledge more
then any book ever did. The only design book I have is for CSS 2.1


I'm also self-taught, and I learned much of what I know by having downloaded
a really comprehensive reference that is written in German (unfortunately
it's not available in English).  Right now I'm at the point where I only 
use the W3C

specs I have downloaded as a reference. Essentially, I think, web design is
not that difficult. Understanding the CSS box formatting model is imho very
important, and when looking for the answer to any specific problem, I 
use Google.


Just my 2 cents,

Claus

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Re: [Gimp-user] Plugins

[Claus Cyrny]

BGP wrote:

I've noticed there are a lot of plugins that are available for GIMP.

Say for example you find a gradient plugin.

Where do you install it?
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I can strongly recommend "Grokking the Gimp"
by Carey Bunks. I guess this will answer about
any of your question.

You can find it here:

http://gimp-savvy.com/BOOK/index.html

HTH,

Claus

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Re: [Gimp-user] Complaint

[Claus Cyrny]

Paul Hartman wrote:

On Fri, Jan 22, 2010 at 8:41 AM, BGP  wrote:
  

I'm sure you folks are all experts at GIMP but I've found it to be a
very hard to learn how to use.  But how many hundreds of hours did it
take you to learn how to use it?



It depends what you mean by "learn how to use it". GIMP is just a
tool, what you can do with it depends on your creativity and skill as
well.


I'm actually tempted to suggest something like "Gimp - the Zen Way"
or something like that! ;-)  At times, I just play around with the features,
just to see what's possible - and sometimes with surprising results. I came
up with things you probably won't find in any tutorial.

Just my 2 cents,

Claus

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Re: [Gimp-user] Fwd: Re: GIMP vs Photoshop

[Claus Cyrny]

Programmer In Training wrote:

On 1/20/2010 12:08 PM, Martin Nordholts wrote:

  

But I think we need to keep the setting we have. Some people prefer it
the way you do, they want their image windows to hide docks, while
others don't want the docks to be hidden.

 / Martin





Then the old behavior from 2.4 should be made optional, or at least a
reasonable facsimile.


I have the impression that this is only an issue under Windows.
Under Ubuntu, I'm really fine with the way it is now.

Claus
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Re: [Gimp-user] Fwd: Re: GIMP vs Photoshop

[Claus Cyrny]

Programmer In Training wrote:

On 1/20/2010 7:04 AM, David Gowers wrote:
  

On Wed, Jan 20, 2010 at 11:22 AM, Programmer In Training



  

So the next update will see the ability to revert back to the old
behavior? That will be nice. (:
  

What version are you using?
GIT HEAD (dd8b867852efccc00eda94244ef1f27dc1a145b7 as of this writing)
already has this option working, I just checked.
I think commit db2221c97d0532b2a558ba44fb80f2b4e39c2c0a (25 or so
commits earlier) was the first commit in which this switching was
non-buggy, but don't quote me on that.




2.6.8 and as far as I can tell, there is no way to revert to old behavior.

This is the behavior I'm currently having to deal with.
http://www.joseph-a-nagy-jr.us/images/screen-caps/gimp.png (458KB, don't
ask me how it's that large)
  


Why do you need a 'Minimize' button for the toolbox? For 2.8,
there will be an optional singe-window mode available (the link
to the respective article was already posted in this thread).

Claus




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Re: [Gimp-user] JPG file size increases with saving

[Claus Cyrny]

yahvuu wrote:

Norman Silverstone wrote:
  

Here is a table that provides an approximate mapping between Photoshop
quality levels and GIMP (actually IJG JPEG library) quality levels:

Adobe Photoshop quality 12  <=  GIMP quality 98, subsampling 1x1



Sure; subsampling takes groups of 4 x 4 pixels and averages the values
for hue/lightness for 2 x 2 pixels, or all four pixels respectively.

4 x 4 x 4 retains the original data, 4 x 2 x 2 averages for two groups
of 2 pixels each, and 4 x 1 x 1 assigns the same value to all four pixels in
the group , which results in a smaller file, but loss of quality at the same
time. (That's at least how I understood it.)

4 x 4 x 4:  4 x 2 x 2:4 x 1 x 1:
-  - -
|   |   |  |   |   | |   |
-  |   |   | |   |
|   |   |  |   |   | |   |
-  - -

Then there' s also the DCT value (Discrete Cosinus Transformation; the
algorithm used in JPEG; I think JPG 2000 uses a Discrete Wavelet
Transformation instead, which results in better quality -> less JPG
artifacts). I have set this option to 'Fast Integer'; 'Floating Point' 
results

AFAIK in additional loss of information.

Claus

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[Gimp-user] New GUG site available

[Claus Cyrny]

Hi again,


since I am able to post to the list again, here's a post of
mine that came back initially.

After the old GUG (Gimp User Group) website had been
shut down, a new site is up again at

http://gug.criticalhit.dk/

So far, there are the old tutorials and a few posts
available. It seems to me that this new site isn't that
well-known yet, so I'm posting this here.

Claus

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Re: [Gimp-user] JPG file size increases with saving

[Claus Cyrny]

Philip Rhoades wrote:

Cristi,


On 2010-01-16 06:55, Cristian Secară wrote:
  

On Fri, 15 Jan 2010 21:56:40 +1100, Philip Rhoades wrote:



- When saving as JPG with 85% quality am I losing information?
  

Yes, but still with the same 85% quality you may obtain different
results by changing other parameters.

Just look at the following example. Note the file size for each, but
most of all, look at the color quality and the outline of objects
(the files are quite small; save them somewhere and look at them by
switching forth and back so you can notice the differences).
The JPEG were both saved with 85%, but one with subsample for best
quality and the other with subsample for minimum file size:

http://www.secarica.ro/misc/monopoly.bmp
http://www.secarica.ro/misc/monopoly.png
http://www.secarica.ro/misc/monopoly_gimp_hi_quality.jpg
http://www.secarica.ro/misc/monopoly_gimp_minim_size.jpg

Take the .bmp and do further tests with the save options.




Yep, the only one where I could see a difference was with the last one.

It still seems counter intuitive that opening a JPG (even if it is a 
photo rather than a computer generated image) and immediately saving it 
with 100% "quality" increases the size by 2.5 . 
  


The exampe image is actually not well-suited for JPG. For this one,
indexed PNG would work much better. Som, this comparisonis actually
misleading. It would actually be better use a photo for this.

When I was still using Windows (I'm under Ubuntu "Karmic" now), I used
Ulead's SmartSaver, where one can view the original & the optimized image
at the same time and tweak the settings until one is satisfied with the 
result.


I usually have compression set to '90%'. Due to quality reasons, I never go
below that. Additionally, for DCT (Discrete Cosinus Transformation), I am
using 'Fast Integer', not 'Floating Point' (further loss, AFAIK). ('DCT' 
is part

of the JPG compression process, which works in several steps.)

Claus

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Re: [Gimp-user] Looks like another Gimp book will be out in November: GIMP Bible by Jason van Gumster, Wiley Press

[Claus Cyrny]

DJ wrote:
> Hi Gimp-users,
>
> Looks like another GIMP book will be out in November.
>
> GIMP Bible by Jason van Gumster, Publisher: Wiley
> http://www.amazon.com/GIMP-Bible-Jason-van-Gumster/dp/0470523972

I'm actually a bit skeptical due to the book's subtitle ("The book
you need to succeed"). IMHO, this is basically just a clever marketing
trick (plus, it deliberately puts some pressure on the potential customer).
I have to admit that this doesn't particularly take me in for the book.

Claus
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Re: [Gimp-user] Layered TIFF?

[Claus Cyrny]

Gary Collins wrote:

> For me, one of the greatest hindrances to migrating to GIMP is its 
> inability to handle layered TIFF files. I have a large number of such 
> files, with zip compression, and I really don't wan't to have to 
> change this format, because for one thing my preferred picture viewer 
> can handle layered TIFF files but can't handle GIMP format (at least, 
> not yet. I have put in a request to the author and it is possible that 
> in future this capability may be added) and for another thing, TIFF 
> with zip compression seems to provide the most compact lossless format 
> for layered files. Any chance that the ability to load/save layered 
> TIFF files (with zip compression) might appear in a future version of 
> GIMP?

 I tried various methods to convert a multi-layered TIFF I created using
Krita, but none of those would open in Gimp. I actually converted the
TIFF to PSD using ImageMagick, but Gimp complained about an unknown
compression type in layers.

You may want to try this TIFF specific mailing list:

http://lists.maptools.org/mailman/listinfo/tiff

Maybe you can get a hint there on how to go about converting
your images.

HTH,

Claus


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Re: [Gimp-user] Batch tool suggestions? (corr.)

[Claus Cyrny]

Claus Cyrny wrote:


4.) Perform 'Find Edges (Sobel)' on the  mask


Value: 0.25


5.) Perform a 'Gaussian Blur' (value: 0.35 ... 0.50)
on the mask


This should actually read '0.2'. ('0.35 ... 0.50' are the
values I use for the final 'Unsharp Mask'.)

Claus

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Re: [Gimp-user] Batch tool suggestions?

[Claus Cyrny]

norman wrote:

On Thu, 2009-04-09 at 22:17 -0400, Evan Kroske wrote:
  

Hello GIMP users,
I'm going to be developing a batch image processor plugin for GIMP, 
and I'd like to know which functions should be the first on my list. 
Obviously, scaling is the first priority, because I use that to optimize 
pictures for my websites. However, past that, I'm not sure which 
functions are the most used. Should I add ... [ ... ] What are the most important 
functions for you?



I have never done this sort of thing but, from what I have learned, the
last thing I would do is sharpen the image and the step before that
would be to size the image.


I personally would really like to have

a) Resampling
b) 'Smart' Unsharp Mask

available, which I use quite frequently.

The latter is an advanced  'Unsharp Mask'
technique, which goes as follows:

1.) Decompose the image to HSV
2.) Select the 'V' layer
3.) Copy this layer into a mask
4.) Perform 'Find Edges (Sobel)' on the  mask
5.) Perform a 'Gaussian Blur' (value: 0.35 ... 0.50)
on the mask
6.) Mask -> selection
6.) Delete the mask
7.) Perform 'Unsharp Mask' on the now-selected 'V' layer
8.) Compose the image back to RGB

The results one gets when using this technique are visibly
better than a mere 'Unsharp Mask'.

Greetings,

Claus

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[Gimp-user] 16-bit/CMYK roadmap?

[Claus Cyrny]

Hi,

after following the thread on printing out of the Gimp,
I wonder when 16-bit/CMYK is supposed to be implemented
in the Gimp?

TIA,

Claus

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Re: [Gimp-user] Fading to transparency tutorial?

[Claus Cyrny]

json wrote:
> Hi there everyone,
>
> Quite a while ago, I used a tutorial on GUG for fading an image to
> transparency, which I wanted to use as the top of a web page background.  For
> clarification, you can look here at the image:
>
> http://personal.schwim.net/images/share/snowflake_background.jpg
>
> I'm trying to do the same thing now, but with grass to green.  The problem
> I'm having is that I can't remember how I did it and GUG went the way of the
> spam farm :)
>
> I remember it was two layers, one with transforming black to transparent at
> the midline, using gaussian(I think) blur to soften the line of transormation
> and then overlaying, but I can't remember the details enough to reproduce it.
>
> Does someone know of an alternate location for the tutorial that I need or
> maybe more detailed instructions leading to the same end?
>   

Those are basically two layers: On the bottom layer there's the blue (in 
your case,
green) gradient, the snowflakes are on a transparent second layer. To 
achieve the
transitional effect, apply a black-to-white gradient as a layer mask to 
the snowflakes
layer ('Layers > Add Layer Mask', with the default setting; then apply 
the black-to-white
gradient to this layer, and as a third step, 'Apply Layer Mask'. 
Finally, merge the two
layers with 'Flatten Image' or CTRL+M (Merge Visible Layers). That's 
basically it.

HTH,

Claus

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Re: [Gimp-user] HTML ??

[Claus Cyrny]

Michael Schumacher wrote:

bgw wrote:

  

and the se cond part is added by the emailer that Rlt46gem is using --
not sure anything can reasonably be done about that.



Using a different mailer would be reasonable then, IMO.


Rebecca,

doesn't your email client have an option to send messages in
plain text? In Thunderbird, this is possible (but you seem to be
using some AOL client).

Claus

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Re: [Gimp-user] How to do this?

[Claus Cyrny]

vicky aur wrote:
> Hi all,
>
> How do I make a photograph to look like this?
> http://customize.org/wallpapers/52351

This example is actually a vector drawing. Taking into
account that you're new to Gimp, I would  rather suggest
using a vector graphics program such as Inkscape (you can
download the latest version from http://www.inkscape.org/).
You can import the  photograph in question into Inkscape [via
 + I] and draw "over" it using Inkscape's curve tools. I
usually make a  second layer for the drawing and make this
semi-transparent [via the "Layers" menu]. This way,  you still
see the photograph on the bottom layer. When you're finished
drawing, all you have to do is, to delete the photograph, make the
second layer fully opaque again, select the drawing you made
[ + A] and export the drawing as a PNG [  + E].

HTH,

Claus

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Re: [Gimp-user] Script-Fu

[Claus Cyrny]

Hi Saul,

saulgo...@flashingtwelve.brickfilms.com wrote:
> The code I attached to my previous post had a mistake on line #24  
> which should have been:
> (set! layer (car (gimp-image-get-active-layer value-image)))
>
> I also should have used 'hue-image' and 'sat-image' when I later  
> called 'plug-in-compose' (the code I had functioned fine, it just  
> might be a little confusing).

thanks a lot for the code you attached, and many thanks to
the others who responded!

Greetings,

Claus

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[Gimp-user] Script-Fu

[Claus Cyrny]

Hi,

I'm currently trying to write a Script-Fu (actually
my first one), but although I found several online
tutorials on how to go about, I'm still not sure of
the proper syntax for most of the steps I would like
the script to perform. This is basically an advanced
'Unsharp Mask' I have been doing manually so far,
but since I need it very often,  would like to make
a Script-Fu for this.

The steps are:

- Decompose the original RGB image to HSV
- Select the V layer
- Copy the V layer into a  mask
- Select merely the mask
- Perform 'Find Edges (Sobel)' (value: 2.5) on the mask
- Perform 'Gaussian Blur' (value: 2) on the mask
- Make a selection from the mask
- Delete the mask
- Select the V layer with the selection
- Perform 'Unsharp Mask' (value depends upon the image)
- Compose the image back to RGB

TIA,

Claus

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Re: [Gimp-user] How to remove alpha channel?

[Claus Cyrny]

Joerg Bergmann wrote:
> Simply spoken: I do not
> want alpha channels in my tiffs.
>
> Thanks for a hint.

You can also define a keyboard shortcut for this, so
that you don't have to do it manually via the menu
each time. In my Gimp 2.4.7, it can be done via
"File > Keyboard Shortcuts".

HTH,

Claus

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Re: [Gimp-user] Changing the default values

[Claus Cyrny]

Claus Cyrny wrote:

Hi,

where can I change the Gimp's default values for
filters, etc.? I am using Gimp 2.4.7. under Ubuntu
8.10.


After looking through all of the Gimp's directories, such
as /usr/share/gimp, /etc/gimp, or $HOME/.gimp-2.4, I
wonder if this is possible at all without modifying the
source code.

Claus

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[Gimp-user] Changing the default values

[Claus Cyrny]

Hi,

where can I change the Gimp's default values for
filters, etc.? I am using Gimp 2.4.7. under Ubuntu
8.10.

TIA,

Claus

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Re: [Gimp-user] zip archive with textures

[Claus Cyrny]

Hi Rebecca,


I decided to remove the archives, because I realized (this is
actually the very first time I did this) that I don't feel
comfortable with my stuff "floating around" on the Internet.
I really apologize, but after thinking it over, I came to the
conclusion that this this the best solution for me.

Greetings,

Claus


rlt46...@aol.com wrote:
>  >>>  http://home.arcor.de/ccyrny/downloads/textures_02.zip
>  
> Hello Claus,
>  
> Of necessity, I am digest and the link did not work for me.  Would you 
> please send it to me directly at rlt46...@aol.com 
> <mailto:rlt46...@aol.com> ?  Thanks.

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Re: [Gimp-user] Free textures

[Claus Cyrny]

Hi Adrian,

Adrian Dusa wrote:

>  > > http://home.arcor.de/ccyrny/downloads/textures.zip
> 
> Sorry to be ignorant, but how does one include these files in Gimp's 
> textures?

under Linux, there's a hidden subdirectory 
$HOME/.gimp-[version]/patterns. If you save
the textures there with the extension .pat
(after opening them in the Gimp), they should
be available as Gimp textures (you would
have to restart the Gimp first).

Under Windows (I'm not familiar with MacOS), there
should be a directory with the same name (most
likely [Drive]:\Program Files\gimp-[version]\patterns.

Claus

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[Gimp-user] Free textures (2)

[Claus Cyrny]

Hi,

I compiled another zip archive with textures, which
contains both tileable versions of some of the textures
from the first archive, plus some additional ones.
In the meantime, I included a README file and licensed
all of the textures under a Creative Commons license:

http://creativecommons.org/licenses/by-nc-sa/3.0/de/

The new archive can be found at

http://home.arcor.de/ccyrny/downloads/textures_02.zip

Claus
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Re: [Gimp-user] lossless cropping?

[Claus Cyrny]

Gary Collins wrote:

> Hello. I read from an article which says jpeg images can be cropped
> losslessly. I searched "lossless gimp crop" on google without good
> findings. Can gimp do lossless cropping? If not, what software (better
> has an GUI because I am not commandline guru) on Linux can be used to do
> lossless cropping?

For Linux, there's of course the command line based
ImageMagick (http://www.imagemagick.org/). You can  do
really amazing stuff with it (see at http://www.imagemagick.org/Usage/).

Greetings,

Claus

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Re: [Gimp-user] select region inside a rectangle

[Claus Cyrny]

Hi Adrian,

Adrian Dusa wrote:
> Dear all,
> 
> I'm a Gimp newbie, using it for a long time but at an amateur level.
> 
> I have the following (hopefully simple) problem: given two rectangles 
> with a common border, is there a way to select the region *inside* one 
> rectangle (to fill it with another color), without affecting the 
> contents of the other rectangle?
> 
> I attached a .png file just for illustration, I hope attachments are 
> allowed.
> 
> The problem is of course simplified, in the real problem I have 
> different shapes for each rectangle (but still with comon borders, like 
> in maps).

One way to accomplish this would be, to use the magic wand with
the default setting. This implies that the background has just
one color: otherwise, you would have to increase the threshold.

HTH,

Claus


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Re: [Gimp-user] Free textures

[Claus Cyrny]

Jeffrey Brent McBeth wrote:
> On Mon, Feb 02, 2009 at 01:29:18PM +0100, Claus Cyrny wrote:
>  
>>> Could you check if this file is a valid zip file?
>> Sorry, the file got corrupted somehow. I'm using Ubuntu's
>> archive manager, and it seems that there's a problem
>> with zip files. I now created a tar.gz archive. I'm
>> not sure if utlilites such as WinZip support this,
>> but currently I have no other option. (I could also
>> try .jar, which I never used before).
> 
> WinZip does support tar.gz
> JAR is just a zip file with some extra metadata
> I would be _shocked_ if you couldn't just zip this yourself.  It isn't
> hard, if you want maximum compression...
> 
> "zip -9r ArchiveName.zip Directory_To_Be_Zipped
> Additional_Files_If_Needed"

Ok, the textures are now available at

http://home.arcor.de/ccyrny/downloads/textures.tar.gz

and

http://home.arcor.de/ccyrny/downloads/textures.zip

Claus ;-)

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Re: [Gimp-user] lossless cropping?

[Claus Cyrny]

Greg Chapman wrote:
> Hi Alexander,
> 
> On 02 Feb 09 09:26 Alexander Rabtchevich 
>  said:
>> I think you mix cropping and resizing :).
> 
> I didn't mix them. I just assumed Johan had. Up till now this thread 
> had been exclusively about cropping.

I have to admit that, after following this thread, I still
have no idea what Zhang Wei Wu means by 'lossless 'cropping'.
I understand' lossless compression', but cropping is by definition
lossy (you remove part of the original image), so I don't
know what 'lossless' means in this context.

Claus

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Re: [Gimp-user] Free textures

[Claus Cyrny]

Michael Schumacher wrote:
>> Von: Claus Cyrny 
> 
>> zip archive:
>>
>>   http://home.arcor.de/ccyrny/downloads/textures.zip
> 
> Could you check if this file is a valid zip file?

Sorry, the file got corrupted somehow. I'm using Ubuntu's
archive manager, and it seems that there's a problem
with zip files. I now created a tar.gz archive. I'm
not sure if utlilites such as WinZip support this,
but currently I have no other option. (I could also
try .jar, which I never used before).

So, the new URL is

http://home.arcor.de/ccyrny/downloads/textures.tar.gz

Claus
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[Gimp-user] Free textures

[Claus Cyrny]

Hi all,

after reading the last post in the 'Golden Text'
thread, I came up with a number of textures myself.
I packed the in a zip archive, and anyone here on
the list is free to download them for personal use.

I'm actually not sure if those textures tile; an
attempt to perform the 'Tile...' option in the Gimp
didn't give good results, so I left them as they are.
I really enjoyed making those textures, and I think
the quality is really good.

Sample:

http://home.arcor.de/ccyrny/downloads/tiles_samples.jpg

zip archive:

  http://home.arcor.de/ccyrny/downloads/textures.zip

The archive contains both preview images (120x120,
as JPEG's), as well as the textures themselves as
.xcf  files (400x400).

Hope you like them,

Claus

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Re: [Gimp-user] Unable to replicate Golden Text effect, explained in Gimp tutorials.

[Claus Cyrny]

alexandre suzuki wrote:
> Something is probably missing in the Golden Text
> tutorial,in the www.gimp.org website.The best I can
> get is flat,uninteresting golden text following
> the steps in the tutorial,and trying with several
> parameters.The beautiful,rich,surface lighting(the
> complexity of the golden light effects on the text
> surface) presented seems so distant to reach.

Why? You are getting the flat text because you
didn't blur the bump map (see further below).
I usually copy the b/w text layer and blur the
copy, So I can use the original text layer as a
layer mask, to "cut out" the final text. This looks
smoother than in the example, where there's a white
'halo' around the text.

> I used the same environment map image of the tutorial,
> and I did not do the gaussian blur on the bumpmap
> image
> (grayscale) the filter was not available.

??? 'Filters > Blur > Gaussian Blur'. This step is
essential; otherwise, you don't get the 3D effect.

> I used gimp-2.6.4 and the lighting effects plugin
> (standard in 2.6.4).
> It seems the "story" was not completely told and some
> kind of "secret" remains uncovered.

IMHO, there isn't a "secret" to it; it's just a technique
everybody can learn. If you're still stuck, feel free to ask
me again.

Greetings,

Claus

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[Gimp-user] Calibrating one's system

[Claus Cyrny]

Hi,

after posting on ICC profiles, I realized (via several
online documents) that the first step is actually,
to calibrate the monitor. I found two tutorials on
this, but when trying to calibrate my Fujitsu-Siemens
monitor (Scaleoview 19-2 TFT) by using the first tutorial
at scarse.org, I had to realize that this didn't work at
all. After checking the system gamma and correcting it
according to the patterns at the site

see http://www.scarse.org/adjust/

I wasn't able to set either black
(http://www.scarse.org/adjust/black.html) or white
(http://www.scarse.org/adjust/white.html) point. They are
simply out of the range of what I can adjust via the OSD
(On-Screen Display). Now I am asking myself if this tutorial
is probably only for CRTs. I then tried another tutorial
by Norman Koren at

http://www.normankoren.com/makingfineprints1A.html

This seems to be much better, and he mentions a variety of other
online sources with test images, software for calibration/
gamma correction, etc.

But when trying to correct the gamma of my system, I got
two different correction values (monitor: see above;
OS: Ubuntu 8.10/i386):

1.4 (http://www.scarse.org/adjust/gamma.html)
1.4 (http://www.normankoren.com/makingfineprints1A.html#gammachart)

1.76 (LProf -> http://lprof.sourceforge.net/)

My question: What is the proper correction value? 1.4?

Does anyone know what the differences between calibrating
CRTs and TFTs are?

Those issues aside, I find the topic very exciting.

For those interested, here are a few recommendable sites
I came across:

- http://www.scarse.org/adjust/ (see above)
- http://www.normankoren.com/makingfineprints1A.html (see above)
- http://www.digitaldog.net/tips/index.shtml (reference images & more)
- http://www.eci.org/doku.php?id=en:start (ICC profiles for offset
printing, docs on the proper use of PDF, etc.
- http://lprof.sourceforge.net/ (calibration software for Linux)
- http://docs.scribus.net/index.php?lang=en&page=moncal (LProf HOWTO
at the Scribus site)

Cheers,

Claus

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Re: [Gimp-user] Bubble effect

[Claus Cyrny]

Dave 77459 wrote:
> Thanks for the pointer.  Do you have a recommendation for settings?  
> GIMPressionist seems to overlap brushes, rather than varying the size to 
> fit available spaces without overlap.

Try 'Gimpressionist > Dotify'. You can set quite a number of options,
such as the size of the dots, random distribution, density, ... You can
also choose a background pattern, or set the background to a solid
color.

HTH,

Claus

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[Gimp-user] ICC profiles

[Claus Cyrny]

Hi,

I'm looking for ICC profiles for a) a Kodak Easyshare Z8612 IS
& b) a Scaleoview X192 monitor by Fujitsu Siemens, to use them
with the Gimp 2.4.7. I really couldn't find anything on the Kodak
site (both at kodak.de & kodak.com), or on the Fujitsu Siemens site.
Does anyone possibly know where I can obtain/download those profiles?
(Regarding the monitor profile I posted in the Fujitsu Siemens user
forum, so maybe I'll be getting an answer there. At the moment, the
most important profile is the one for the camera.)

TIA,

Claus

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Re: [Gimp-user] About Pointillism / Pointillist Effect

[Claus Cyrny]

Nathan Lane wrote:
> I just tried out what Claus suggested on this picture of Dennis Ritchie 
> (attached).
> 
> 1. Image > Mode > Grayscale
> 2. Colors > Brightness-Contrast (Brightness=127, Contrast=35)
> 3. Image > Mode > Indexed (Generate optimum pallette, Maximum number of 
> colors=2)
> 4. Opened up the Colormap tab on the Layers, Channels,... toolbox 
> (color0=00, color1=ff)
> 
> and I ended up with the other attached image that almost looks like the 
> Linus Torvalds image you attached.

I tried this myself and came up with something similar,
but the dithering in the Linus Torvalds image is
much subtler. My guess is that this was achieved
by using a plug-in (Photoshop?). I couldn't find
anything similar (at least during a quick search)
on the Gimp plug-ins site, at http://registry.gimp.org/.
Maybe someone else can find anything.

Greetings,

Claus

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Re: [Gimp-user] About Pointillism / Pointillist Effect (correction)

[Claus Cyrny]

Claus Cyrny wrote:

> 3. Increase the contrast as much as possible,
> without losing the details you would like to
> keep.

Here I made a mistake. The more shades of grey
you have in the original image, the better the
dithering (-> more details).

Claus

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Re: [Gimp-user] About Pointillism / Pointillist Effect

[Claus Cyrny]

J Figueroa G wrote:
> I have one question about a filter, plugin or script that can make a 
> similar effect like THIS IMAGE 
> <http://www.muylinux.com/wp-content/uploads/2009/01/linus-y-gnome-1.jpg>
> 
> I can say that this is an Pointillist Effect, but the newspaper filter 
> effect can't make.
> 
> I hope that you can give me one answer or guide steps.

At a very first glance, I see that this is an
indexed image with a color depth of just 1-bit.
This effect can be achieved by dithering
the image.

One (quick) way to do it would be:

1.) Convert the image to greyscale.
2.) Optimize it (remove background etc.)
3. Increase the contrast as much as possible,
without losing the details you would like to
keep.
4.) Convert the image from greyscale to indexed
with 2 colors (black and white). Set the options
'Use a black and white (1-bit) palette' and
'Dithering > Color Dithering > Floyd-Steinberg
(reduced color bleeding)'.

You may not get all the subtle details included in
your example (this 'copperplate engraving' effect),
but at least that's a start. Maybe there is some
plug-in for the Gimp available.

HTH,

Claus

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Re: [Gimp-user] facing difficulty in irunning gimp

[Claus Cyrny]

Nicholas I wrote:
> hi,
> 
>  i am using ubuntu 8.3

You probably mean 8.4 ("Hardy").

  i did a sudo apt-get install gimp, it did not
> upgraded to the newest version, i tried installing from source but i had 
> lot of problem in installing it. i just left it.
> 
> now when i run gimp from command propmt
> 
> i get the following error.
> 
> *Libgimp version mismatch!
> 
> The GIMP binary cannot run with a libgimp version
> other than its own. This is GIMP 2.4.5, but the
> libgimp version is 2.6.0.

For some reason, you have libgimp for Gimp 2.6 installed that doesn't
match Gimp 2.4.5. You need to a) uninstall the present libgimp (via
Synaptic), b) get the appropriate libgimp for 2.4.5 (as a .deb file)

http://launchpadlibrarian.net/12511801/libgimp2.0-doc_2.4.5-1ubuntu2_all.deb

and c) install it via 'sudo dpkg install ' or
'sudo gdebi '.

HTH,

Claus

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Re: [Gimp-user] Gimp 2.6.1 on Ubuntu 8.10

[Claus Cyrny]

Claus Cyrny wrote:

> Olivier Lecarme wrote:
>> Claus Cyrny  wrote:
>>> libpoppler IS there, as are librsvg, libexif, and libgnomeui-2.0
>>> (I didn't check the rest). Does anyone know what's the matter here?
>>> I downloaded the source from the FTP site (the link is included on
>>> the Download page at gimp.org).
>> You need the headers of the libraries. In dpkg or apt-get words, you
>> need the xxx-dev packages. For example, libpoppler-dev, librsvg-dev, and
>> to on.
>>
> 
> I just installed all dev libraries.
> 
> Merci beaucoup, ;-)
> 
> Claus
> 

I now did compile Gimp 2.6.4 successfully, but the bug (or whatever
this is) remains, :( so that I am forced to install 2.4.7
again, until I have the money to buy an up-to-date PC. :(

BTW, I'm beginning to like the new interface as well as the
improved menu structure, albeit it is different from the one I
am used to. I really regret it that it turned out that way, but
I see no other solution at the moment.

Thanks anyway to all who responded,

Claus

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Re: [Gimp-user] Gimp 2.6.1 on Ubuntu 8.10

[Claus Cyrny]

Olivier Lecarme wrote:
> Claus Cyrny  wrote:
>>
>> libpoppler IS there, as are librsvg, libexif, and libgnomeui-2.0
>> (I didn't check the rest). Does anyone know what's the matter here?
>> I downloaded the source from the FTP site (the link is included on
>> the Download page at gimp.org).
> 
> You need the headers of the libraries. In dpkg or apt-get words, you
> need the xxx-dev packages. For example, libpoppler-dev, librsvg-dev, and
> to on.
> 

I just installed all dev libraries.

Merci beaucoup, ;-)

Claus

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Re: [Gimp-user] Gimp 2.6.1 on Ubuntu 8.10

[Claus Cyrny]

Bernhard S. wrote:

> The stripes you're mentioning come from the limited support of bit-depth (8
> bit per channel in GIMP - even in 2.6). So upgrading to 2.6 would not fix
> these stripes.
> 
> As for your crash-problem: I've no idea what the problem of this is or how to
> fix it but you can try if other .deb-packages work instead of the ubuntu 8.10
> out of box-version.
> 
> you'll find the link to it on our downloads-section:
> http://www.gimpusers.com/gimp-download.php

After installing Gimp 2.6.4 (plus gimp-data & libgimp),
Gimp was basically working, but as soon as I tried to
use any function from the 'Colors' submenu, Gimp closed
immediately, and with the same error message regarding
gimpbase. As my last resort, I tried to compile 2.6.4,
but here I ran into other problems: libraries that definitely
ARE installed are reported to be missing. So I did what
.configure recommended and used ./configure --disable-python
--without-libtiff. This time, all the Makefiles were created,
yet at the end I got the following:

Building GIMP with prefix=/usr/share/gimp/2.6.4, datarootdir=${prefix}/share
Desktop files install into ${datarootdir}

Extra Binaries:
   gimp-console:yes
   gimp-remote: no (not enabled)

Optional Features:
   D-Bus service:   no
   Language selection:  yes

Optional Plug-Ins:
   Ascii Art:   no (AA library not found)
   Help Browser:no (WebKit not found)
   LCMS:no (lcms not found or unusable)
   JPEG:yes
   MNG: no (MNG header file not found)
   PDF: Using PostScript plug-in (libpoppler not found)
   PNG: yes
   Print:   yes
   PSP: yes
   Python:  no
   Script-Fu:   yes
   SVG: no (librsvg not found)
   TIFF:no
   TWAIN (MacOS X): no
   TWAIN (Win32):   no
   URI: yes (using GIO/GVfs)
   Windows ICO  yes
   WMF: no (libwmf not found)
   XJT: yes
   XPM: no (XPM library not found)

Plug-In Features:
   EXIF support:no (libexif not found or too old)
   GNOME UI:no (libgnomeui-2.0 not found)
   GNOME keyring:   no (gnome-keyring-1 not found)

Optional Modules:
   ALSA (MIDI Input):   no (libasound not found or unusable)
   Linux Input: yes (HAL support: no)
   DirectInput (Win32): no
   Color Correction:no (lcms not found or unusable)
   Soft Proof:  no (lcms not found or unusable)


libpoppler IS there, as are librsvg, libexif, and libgnomeui-2.0
(I didn't check the rest). Does anyone know what's the matter here?
I downloaded the source from the FTP site (the link is included on
the Download page at gimp.org).

TIA,

Claus

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Re: [Gimp-user] Attach Gimp file in to Blender

[Claus Cyrny]

Michael J. Hammel wrote:
> On Sat, 2009-01-24 at 17:27 +0100, OnyX wrote:
>> In severel Blender tuts, I need to go in to Gimp and made things and then
>> export it in to Blender.
>> http://www.linuxgraphic.org/section3d/blender/pages/didacticiels/paysages/index-ang.html


??? You can /import/ bitmap files from Gimp to Blender, but Gimp
doesn't save anything in Blender's .blend format, since .blend is
a format for storing 3D scenes, and this doesn't make any sense in
the context of the Gimp. I am assuming that you would like to export
height maps into Blender? For this, you could use formats like
PNG or TIFF, even JPG. You would only need grayscale images for this,
AFAIK (no RGB), and I wouldn't recommend converting the maps to indexed
colors: a) I'm not sure if Blender could handle this, and b) you lose
too much detail.

> 
> Nice.  I wish I spoke German (that's the language there, right?).

It's actually French! ;-)

Claus

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Re: [Gimp-user] Scaling image via the command line

[Claus Cyrny]

Sanjay Murthy wrote:
> Hi,
> 
> I wish to scale the 6MP images from my camera to a smaller size say 
> 600x800 to be loaded into my phone. How can this be done via command 
> line ? What are the switches (and arguments)  to be used ? I have 
> hundreds of images to be scaled. doing this with the GUI is impractical. 
> I have GIMP on Linux and Windows. I am reasonable linux literate . I 
> work on it for a living.

For this, I can recommend ImageMagick (http://www.imagemagick.org/).
The 'convert' command can do this, and by using a script you can
batch-process files. ImageMagick has an amazing number of options
where you can specify the output file format, the compression ratio,
compression algorithms, resolution, and much more.

Claus

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[Gimp-user] Gimp 2.6.1 on Ubuntu 8.10

[Claus Cyrny]

Hi,

I'm posting this again, since I really would like to
check out the new features in Gimp 2.6.

As I posted a few weeks ago, Gimp 2.6.1 crashes each time
I try to perform a filter, color adjustment, etc., so that
I had to install 2.4.7 in order to have a working bitmap
editor. This happened since I upgraded to Ubuntu 8.10.
Someone suggested that it might have to do with my
outdated hardware (AMD K6 II/350 MHz), but since I don't
have the money right now to buy a new computer, I would
like to know if anyone has an idea what I could do to fix
this problem.

When running Gimp out of a shell, I am getting:

"(script-fu:5142): LibGimpBase-WARNING **: script-fu: gimp_wire_read():
error Illegal instruction"

My guess is that it might have to do with GEGL, but on the other
hand I am assuming that Synaptic would automatically install all
the required packages. (I don't want to have to compile anything;
if there's a fix for it & I need to install additional packages,
I would prefer .deb files.)

I did have the latest 'libgimp' installed (I downgraded to the version
for Gimp 2.4.7 in the meantime), and I am not using compiz (as Chris
asked me the last time I posted on this.)

Especially after reading this very good & thorough review of
Gimp 2.6, I would like to check out the Gimp's new possibilities.
Two thing I am personally missing are a) 16-bit support, as well as
b) better anti-aliasing. While there are workarounds to improve the
latter, Gimp still doesn't output the quality of say, Photoshop.
I especially become aware of this when using curves to get a chromium
effect, or applying 'Lighting Effects', where I am frequently getting 
'stripes' instead of smooth gradients. I don't know, though, how much
this has been improved upon in Gimp 2.6.

TIA,

Claus


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Re: [Gimp-user] What is the best white balance script/plugin?

[Claus Cyrny]

Ken Warner wrote:
> I need to white balance some panoramas shot under high frequency
> florescent light.  I've googled around.  Apparently there is a
> bunch of scm around.  Which is the best?
> 
> The way I would *like* to do it is to use the color picker and
> select the white object in the panorama and say go.

Why don't you just use Gimp's 'Colors > Levels'? There's exactly
the kind of color picker you would like to have. You can select
both black & white point, you have the option 'auto', you can
apply 'Levels' to one specific channel, etc.

Claus

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Re: [Gimp-user] Resizing a larger image to smaller image causes distortion

[Claus Cyrny]

Daniel Hornung wrote:
> On Thursday 22 January 2009, Ajay Gautam wrote:
>> Now that you know the desired end result, what would the best way to
>> go about creating the it, if I were to recreate it from start?
>>
>> Thanks
>>
>> Ajay
> 
> If you can recreate it (or will anyway), do it in a resizable format, like 
> svg 
> with a program like Inkscape.

Basically, I agree, but when dealing with such low resolutions,
IMHO Inkscape doesn't do a good job at converting such small text
properly. In your case, I found that scaling the logo down with
the option 'bicubic' works best. Then copy the logo on a second
layer & set the layer mode to 'Multiply'. Then reduce the transparency
slightly, until the blue looks almost like in the original (it will
become somewhat darker due to the different layer mode). Merge the
image down & apply an 'Unsharp Mask' to it with the amount'25'.
Finally, apply 'Colors > Hue/Saturation > Lightness', until you
have the original blue again.

HTH,

Claus

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Re: [Gimp-user] Gimp latest version

[Claus Cyrny]

Owen wrote:

> Off the top of my head you will at least babl and gegl which may well
> install from a deb
> 
> Otherwise you may have to build them yourself, babl first and then
> gegl, last time I tried, gegl needed building with with
>   ./configure --disable-docs
> 
> you will need an updated glib, pango, atk I think, and finally gtk
> 
> build them with ./configure --prefix=/opt and
> make sure you set the environment variables for your build as follows:
> 
> export LD_LIBRARY_PATH="/opt/lib:/usr/lib"
> export PKG_CONFIG_PATH="/opt/lib/pkgconfig:/usr/lib/pkgconfig"
> export ACLOCAL_FLAGS="-I /opt/share/aclocal"

I tried this myself, but found it very difficult. IMHO, the easiest
way would be to upgrade to Ubuntu 8.10. Then you have all the latest
libraries installed.

HTH,

Claus

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Re: [Gimp-user] "Live" update of selected regions

[Claus Cyrny]

Hi Marco,

Marco Presi wrote:
> Hi,
> 
> I would like to know if there is a way to update a selection made with
> any of the selection tools. After the selection is made I often would
> like to make it smoother or to change the threshold (expecially when
> selecting by color). Acting on the selection controls (smoothing radius,
> threshold, ...) has no effect: in order to make the adjustments, I need
> to re-select from scratch the region.
> 
> Is there a way to do this without selecting from scratch again and
> again?

You could convert the selection to a path, and, at demand, proceed
vice versa (path -> selection). Then you could, say, feather the 
selection, or whatever. This way, you wouldn't have to select the
same area again. That's what comes to my mind instantly.

HTH,

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Re: [Gimp-user] drop shadow

[Claus Cyrny]

Hi Helen,

Helen wrote:
> When I use the drop-shadow filter, I see the checkerboard around the 
> image -- not a
> drop shadow.

Are you trying to make a drop shadow for an object against a transparent
background? At least it sounds like this to me. (Otherwise, you don't 
get the checkerboard pattern.)

I've experienced that in this case the drop shadow isn't easy to notice.
I usually create a temporary white layer  to see the effect, and then 
delete this layer again. (You will have to move this white layer to
the bottom first).

I'm hoping that my description is of some help.

Greetings,

Claus

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[Gimp-user] Gimp User Group web site

[Claus Cyrny]

Hi all,

has the GUG web site at http://gug.sunsite.dk/ been discontinued,
or is it just temporarily off the web?

Claus

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Re: [Gimp-user] How to update GIMP in Ubuntu? (P.S.)

[Claus Cyrny]

Claus Cyrny wrote:

> Meanwhile I performed an upgrade to 2.6 via Synaptic (including 
> 'gimp-data' and 'libgimp') and selected 'libbabl-dev' in addition

I selected gegl as well.

Claus

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Re: [Gimp-user] How to update GIMP in Ubuntu?

[Claus Cyrny]

David Gowers wrote:
> On Thu, Dec 18, 2008 at 4:01 AM, Claus Cyrny  wrote:
>> Hi Akkana,
>>
>> Akkana Peck wrote:
>>
>>> I'm building GIMP 2.6 on Ubuntu 8.04 and it's really no big deal.
>>> You don't need the whole gtk+ chain -- the ones installed on 8.04
>>> are fine. You do need babl and gegl and there are a couple minor
>>> gotchas there.
>>>
>>> I have the complete list of packages you'll need here:
>>> http://shallowsky.com/linux/gimpbuild.html
>> Do you probably know if there is an option/possibility to
>> compile Gimp 2.6 for an older CPU architecture (AMD K6 II).
>> I'm having Ubuntu 8.10 installed, but Gimp 2.6 crashed
>> each time I tried some color adjustment/filters. Someone
>> on the list suggested that it might have to do with my
>> outdated CPU. As a temporary solution, I installed Gimp 2.4.7
>> from a .deb file (as well as 'gimp-data' and 'libgimp').
>> Could it be that my problems are due to an improper installed
>> babl and gegl? I tried to compile 2.6 and got an error message
>> during ./configure that both gegl and babl were missing, although
>> according to Synaptic, they are both installed.
> 
> Did you install the -dev packages? Failing to do so is the usual cause
> of such troubles.
> 

Meanwhile I performed an upgrade to 2.6 via Synaptic (including 
'gimp-data' and 'libgimp') and selected 'libbabl-dev' in addition
(there's no 'gegl-dev' available among the Ubuntu packages). Still,
Gimp crashes, and I am getting the following error message in the shell:

(script-fu:5477): LibGimpBase-WARNING **: script-fu: gimp_wire_read(): error
Illegal instruction

How can I fix this?

TIA,

Claus

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Re: [Gimp-user] How to update GIMP in Ubuntu?

[Claus Cyrny]

Hi Akkana,

Akkana Peck wrote:

> I'm building GIMP 2.6 on Ubuntu 8.04 and it's really no big deal.
> You don't need the whole gtk+ chain -- the ones installed on 8.04
> are fine. You do need babl and gegl and there are a couple minor
> gotchas there.
> 
> I have the complete list of packages you'll need here:
> http://shallowsky.com/linux/gimpbuild.html

Do you probably know if there is an option/possibility to
compile Gimp 2.6 for an older CPU architecture (AMD K6 II).
I'm having Ubuntu 8.10 installed, but Gimp 2.6 crashed
each time I tried some color adjustment/filters. Someone
on the list suggested that it might have to do with my
outdated CPU. As a temporary solution, I installed Gimp 2.4.7
from a .deb file (as well as 'gimp-data' and 'libgimp').
Could it be that my problems are due to an improper installed
babl and gegl? I tried to compile 2.6 and got an error message
during ./configure that both gegl and babl were missing, although
according to Synaptic, they are both installed.

TIA,

Claus

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Re: [Gimp-user] How to update GIMP in Ubuntu?

[Claus Cyrny]

Hi Dave,

Owen wrote:
>> I am running Ubuntu Linux v8.04.  I love Gimp 2.6 on Windows, but am
>> using
>> only version 2.4.5 on Ubuntu.
>>
>> How do I upgrade to v 2.6.x of Gimp on Ubuntu?
> 
> 
> 
> I don't think you are going to be able to do this.
> 
> To do so requires a number of updated libraries, glib,gtk, babl and
> gegl are 4 off the top of my head and I am pretty sure the 8.04
> repositories wont hold these.
> 
> You can do it by building your own libraries from the sources, but I
> guess you don't want to do that

As an afterthought to my private email, I think I agree with that.
There are simply too many additional libraries to update, not just
'gimp-data' and 'libgimp'. I only kept my /home partition from Ubuntu
8.04 and did a complete new install of Ubuntu 8.10.

HTH,

Claus

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Re: [Gimp-user] Billboards

[Claus Cyrny]

Johan Vromans wrote:
> "Nathan Lane" <[EMAIL PROTECTED]> writes:
> 
>> I don't really see what you're trying to do -- If you download that
>> billboard image, then take another image you want to put in that
>> white space on the billboard, then that is completely trivial. Can
>> you explain more please?
> 
> What I want is a good image of an empty billboard, that is transparent
> except for the billboard itself.


Why don't you make one using the Gimp?  ;-)  You can
draw the frame in white on a black background, apply
"Gaussian Blur" to it, make a second layer, and apply
"Filters > Light and Shadow > Lighting Effects..." with
the bottom layer (black/white) as a bump map. A nice
effect can be achieved by selecting the black layer,
shrinking the selection, then applying "Selection> Border"
(with "Feather" set) to it and fill this border with white.
This results in a nice 3D border that can be used as
a bump map for "Lighting Effects...".


HTH,

Claus

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Re: [Gimp-user] Gimp 2.6.1 and 2.6.3 crash

[Claus Cyrny]

On Sat, 06 Dec 2008 20:47:28 +0100, Claus Cyrny wrote:

 >> I just ran Gimp from a terminal, and I am getting
 >> "(script-fu:5142): LibGimpBase-WARNING **: script-fu:
 >> gimp_wire_read():
 >> error
 > Illegal instruction"
 > after it closes.

 > What CPU do you have?

I have an old AMD K6 II /350 MHz.

Claus

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< Contact address: >< jernej simoncic at isg si >

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Re: [Gimp-user] Gimp 2.6.1 and 2.6.3 crash

[Claus Cyrny]

Chris Mohler wrote:
> On Sun, Dec 7, 2008 at 1:47 PM, Claus Cyrny <[EMAIL PROTECTED]> wrote:
>> Hi Chris,
>>
>> Chris Mohler wrote:
>>> On Sun, Dec 7, 2008 at 12:30 PM, Claus Cyrny <[EMAIL PROTECTED]> wrote:
>>>> Hi,
>>>>
>>>> I just upgraded to Ubuntu 8.10, but Gimp 2.6.1 included there
>>>> closes abruptly when I open "Colors > Color Balance...".
>>>> I removed 2.6.1 and got a .deb package of 2.6.3 (with libgimp
>>>> and gimp-data), but here's exactly the same behavior. Does
>>>> anyone know how to fix this? Is this a known issue? Under
>>>> Ubuntu 8.04, I worked with Gimp 2.4.5 and never experienced
>>>> anything like this.
>>> Hi Claus,
>>>
>>> I also upgraded to 8.10 (and therefore GIMP 2.6.1) and cannot
>>> reproduce your problem.  Have you tried running GIMP from the terminal
>>> and looking for an error message?
>> I just ran Gimp from a terminal, and I am getting
>>
>> "(script-fu:5142): LibGimpBase-WARNING **: script-fu: gimp_wire_read():
>> error
>> Illegal instruction"
>>
>> after it closes.
> 
> Do you have 3rd-party plug-ins installed?  Try renaming your
> ~/.gimp-2.6 folder to ~/.gimp-2.6_OLD and restarting GIMP - if that
> solves it, you'll need to copy the plug-ins back one at a time to find
> the culprit.

I did that, but to no avail. :-( And I don't have any plug-ins
installed, yet.

> 
>>  A shot in the dark, but maybe
>>> rename all of your ~/.gimp-2.x folders to ~/.gimp-2.x-OLD ? Are you
>>> running compiz, BTW?
>>
>> What is compiz?
> 
> In Gnome, compiz is the "Desktop Effects"
> (System->Preferences->Appearance, effects tab).  Sometimes it behaves
> badly with other programs...

I checked this, but I have desktop effects disabled.

Claus

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Re: [Gimp-user] Gimp 2.6.1 and 2.6.3 crash

[Claus Cyrny]

Hi Chris,

Chris Mohler wrote:
> On Sun, Dec 7, 2008 at 12:30 PM, Claus Cyrny <[EMAIL PROTECTED]> wrote:
>> Hi,
>>
>> I just upgraded to Ubuntu 8.10, but Gimp 2.6.1 included there
>> closes abruptly when I open "Colors > Color Balance...".
>> I removed 2.6.1 and got a .deb package of 2.6.3 (with libgimp
>> and gimp-data), but here's exactly the same behavior. Does
>> anyone know how to fix this? Is this a known issue? Under
>> Ubuntu 8.04, I worked with Gimp 2.4.5 and never experienced
>> anything like this.
> 
> Hi Claus,
> 
> I also upgraded to 8.10 (and therefore GIMP 2.6.1) and cannot
> reproduce your problem.  Have you tried running GIMP from the terminal
> and looking for an error message?

I just ran Gimp from a terminal, and I am getting

"(script-fu:5142): LibGimpBase-WARNING **: script-fu: gimp_wire_read(): 
error
Illegal instruction"

after it closes.


   A shot in the dark, but maybe
> rename all of your ~/.gimp-2.x folders to ~/.gimp-2.x-OLD ? Are you
> running compiz, BTW?


What is compiz?

Thanks for your response, ;-)

Claus
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[Gimp-user] Gimp 2.6.1 and 2.6.3 crash

[Claus Cyrny]

Hi,

I just upgraded to Ubuntu 8.10, but Gimp 2.6.1 included there
closes abruptly when I open "Colors > Color Balance...".
I removed 2.6.1 and got a .deb package of 2.6.3 (with libgimp
and gimp-data), but here's exactly the same behavior. Does
anyone know how to fix this? Is this a known issue? Under
Ubuntu 8.04, I worked with Gimp 2.4.5 and never experienced
anything like this.

TIA,

Claus
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Re: [Gimp-user] Changing hair colour

[Claus Cyrny]

Victor Domingos wrote:
> What is, in your oppinion,  the best method to make dark hair look  
> like blond hair? 

Given that you have masked out the hair well enough, I
would suggest that you try a combination of 'Tools >
Color Tools > Levels...' (to lighten the hair in the first
place), and then 'Tools > Color Tools Color Balance...'.
After that, I would try 'Tools > Color Tools > Brightness-
Contrast', and finally 'Levels...' again. I think that should
do it.

HTH,

Claus

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Re: [Gimp-user] How to spot fix a large area that is too light

[Claus Cyrny]

DJ wrote:
> Hi,
>
>   
>>> My latest problem. I have a very nice black and white photo of a
>>> couple. The only problem is the man's right arm and part of his chest
>>> are too light. I tried using the cloning and smudge tool, but it
>>> looked like he was wearing a dead raccoon. Not the look I was going
>>> for :-) I so much just want to draw a rectangle around the arm and say
>>> darken, but how do I do that in GIMP?
>>>   
>>>   
> A> If that's really all you want, do just that. Use the rectange select 
> A> tool and then Brightness-Contrast in the Colour Tools. (Other ways of 
> A> selecting might give you better results, though.)
>
> This may be an "ah ha" moment for me :-) Do you mean, if I make a
> selection with any of the Selection Tools, that others Color Tools
> will be limited to that selection...  D'oh!
>
> I guess I was already doing that with the Paint Bucket and Gradient,
> but didn't think other Tools and Dialogs obeyed, like Levels. I'll
> have to play with this.

I would suggest

1. ) Make a selection with the lasso tool.

2. ) Increase the selection by several pixels.

3.) Feather this selection by the same value.

4.)  Darken the selection by using the  Dodge/Burn Tool (SHIFT + D).

HTH,

Claus

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Re: [Gimp-user] How do you select the inside of a circle?

[Claus Cyrny]

Chris Mohler wrote:
> On 5/22/07, Claus Cyrny <[EMAIL PROTECTED]> wrote:
>   
>> David Gowers wrote:
>> 
>>> Drawing a circle in Inkscape will not improve it's quality. The gimp
>>> quality is about the maximum, and you'll find that inkscape provides
>>> pretty much the same quality.
>>>   
>> I have to disagree with you. I noticed that the anti-aliasing in the Gimp is
>> by far not as good as in Inkscape, and I can post some screenshots to prove
>> my point. As I wrote, I tried several ways to improve the anti-aliasing
>> of the
>> circle in the Gimp, but not to much avail.
>> 
>
> And I have to disagree with you :)   Are you zoomed in past 100%?  I
> can't think of any other reason your circle in GIMP should be jagged.
>   

I wonder what I'm doing wrong! :-( Here's an example of what
I tried (Gimp 2.2.8/Ubuntu "Breezy"/24-bit color depth):
 
http://home.arcor.de/ccyrny/downloads/circles_rgb.png

The "jaggies" remain. :-(

How do you achieve getting a smooth circle? I checked both
anti-aliasing and feather (3.0) in the selection tool. The zoom factor
was always 100%.

Claus

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Re: [Gimp-user] How do you select the inside of a circle?

[Claus Cyrny]

David Gowers wrote:
> Drawing a circle in Inkscape will not improve it's quality. The gimp
> quality is about the maximum, and you'll find that inkscape provides
> pretty much the same quality.

I have to disagree with you. I noticed that the anti-aliasing in the Gimp is
by far not as good as in Inkscape, and I can post some screenshots to prove
my point. As I wrote, I tried several ways to improve the anti-aliasing
of the
circle in the Gimp, but not to much avail.

Claus

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Re: [Gimp-user] How do you select the inside of a circle?

[Claus Cyrny]

DJ wrote:
> Hi,
>
> How do I get a selection of the entire inside of an outline of a
> circle? For example, I have a transparent background, and I draw a
> circle in black (it looks like this " O ", minus the quotes)
>   

How do you draw the circle in the first place? Are you using
the circular selection tool & stroke the selection? In this case,
the selection remains after you have drawn the circle, and you
can simply apply a gradient of your choice inside the circle.

But what I personally noticed (i just tried it myself right now) is
the bad anti-aliasing of the circle. I tried several tools, but the
results are far from satisfying.  My  suggestion would be, to draw
the circle in a vector program like Inkscape, where the anti-aliasing
is much better, and then import it into Gimp as a PNG. Or does any-
body else know how to draw a smooth circle using the Gimp?

Claus

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Re: [Gimp-user] Adobe Illustrator output.

[Claus Cyrny]

Sven Neumann wrote:
> Hi,
>
> On Thu, 2007-05-03 at 08:20 -0400, John R. Culleton wrote:
>   
>> Gimp (and other programs) can use Adobe Illustrator output with one 
>> small change.  Just rename the file from foo.ai to foo.pdf. It is 
>> actually pdf 1.4 in format. 
>> 
>
> If these files are really PDF files, then GIMP should detect that and
> you wouldn't have to change the file extension. Do these files actually
> start with %PDF- ?
>
>
> Sven
>
>
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>   

The Gimp converts AI files to postscript, where you can set
both the resolution  and the amount of anti-aliasing. One .AI
file I have on my computer (I'm using Ubuntu Linux) starts
with '%!PS-Adobe-3.0' (Illustrator 8.0).

HTH,

Claus

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Re: [Gimp-user] Photos negatives scanned into the gimp

[Claus Cyrny]

Owen wrote:
>> Or do I need to code a plugin, and if so, what exactly is the operation 
>> to be done
>> (in terms of RGB) ?
>> 
>
>
>
> Image->Layers->Colors->Invert ?
>   

Actually it's not that easy, because the film contains a mask (yellow &
red), which has to be filtered out.

Claus

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[Gimp-user] KPT for the Gimp?

[Claus Cyrny]

Hi,

does anyone know if there is a Script-Fu available
somewhere which emulates Kai's Power Tools (KPT)?
I once had KPT v 3 under Corel PHOTO-PAINT, and it
had some really nice fx. What I'm particularly looking
for is the KPT tool which has a sort of magnifying glass
as an interface, which allowed you to apply warps to
an image. I didn't manage to get this effect by using the
filters/Script-Fu's available in the Gimp.

TIA,

Claus

-- 
Home Page- http://home.arcor.de/ccyrny/[in English]
graf-o-matic - http://grafomatic.twoday.net/   [in German]
:: django|log :: - http://djangolog.twoday.net/[in German]
Djangology   - http://home.arcor.de/ccyrny/djangology/ [in German]

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[Gimp-user] IPTC standard

[Claus Cyrny]

Hi all,

is there some way in which the Gimp supports
the ITPC standard for copyright information,
author, etc. in JPEGs?

TIA,

Claus

-- 
Home Page- http://home.arcor.de/ccyrny/[in English]
graf-o-matic - http://grafomatic.twoday.net/   [in German]
:: django|log :: - http://djangolog.twoday.net/[in German]
Djangology   - http://home.arcor.de/ccyrny/djangology/ [in German]

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Re: [Gimp-user] more than 8 bit/channel

[Claus Cyrny]

Marco Ciampa wrote:
> so the
> answer is no for now and perhaps yes for the next version (2.6? 3.0?) GIMP
> version.

That's why people are switching to other apps like Krita or
CinePaint.

Claus

-- 
Home Page: http://home.arcor.de/ccyrny/ (Photographs)
Blog: http://grafomatic.twoday.net (in German)
"Djangology" http://home.arcor.de/ccyrny/djangology/ (my Django Reinhardt site; 
in German)


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[Gimp-user] Realistic textures

[Claus Cyrny]

Hi all,

as a good alternative to the commonly used
'tiling' textures, there's a great plug-in
 for the
Gimp, written by Paul Harrison . This
creates
so-called 'near-regular' textures. For more on
this, please see

Texture Synthesis on Near-regular and Irregular Textures"
.

An example of how I used this plug-in can be found at
my blog: http://grafomatic.twoday.net/stories/3401251/.

Greetings,

Claus

-- 
Home Page: http://home.arcor.de/ccyrny/ (Photographs)
Blog: http://grafomatic.twoday.net (in German)
"Djangology" http://home.arcor.de/ccyrny/djangology/ (my Django Reinhardt site; 
in German)


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Re: [Gimp-user] removing the background from a scanned text

[Claus Cyrny]

P.S.:

To keep the transparency, you should finally
save the text either as TIFF, PNG, or XCF.
JPEG doesn't support transparency.

Claus

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Re: [Gimp-user] removing the background from a scanned text

[Claus Cyrny]

Hi Ed,

Ed wrote:
> Hello all,
> My knowledge of Gimp and image editing borderlines /dev/null so bare with me 
> please!
>
> Is there a way to make the background transparent so that only the hand 
> written text remain after I have scanned a document... or do I need a tablet?
>
> The document is scanned via xsane so I can have it in multiple formats, TIFF, 
> JPEG, ...
>
> Any help would be apreciated, thanks :)
>   
you could achieve this by selecting the entire scan, copying it into the
clip-
board, and then using this copy as a layer mask. I am presuming that the
text as such is grayscale; otherwise you could first duplicate the layer
(the scan is most likely on the background layer) & then convert it to
a grayscale via 'Layer > Colors > Desaturate'.

The following steps would be (there are actually several ways to achieve
this, but I'm trying to make it as simple as possible):

1. 'Duplicate layer' (the layer with the scan; the text should be in
grayscale
by now; otherwise see above).

2.  Invert  the  colors of the duplicated layer via 'Layer >  Colors >
Invert'.
(This is, btw, an easy way to invert colors in general.)

3. Copy the inverted channel into the clipboard via 'CTRL + A', 'CTRL + C'.

4. Go to the layer with the scan, and apply 'Layer > Mask > Add Layer
Mask...'.

5. Copy the contents of the clipboard into the mask by simply applying
'CTRL + V',
'CTRL + H'.

6. The last step would be 'Layer > Colors Apply Layer Mask...'. This
will remove the
background from the scan, leaving only the text. In case that the
remaining text
is somewhat 'edgy', applying 'Filters > Blur > Blur' after step 1. can
probably help.

HTH,

Claus

-- 
Home Page: http://home.arcor.de/ccyrny/ (Photographs)
Blog: http://grafomatic.twoday.net (in German)
"Djangology" http://home.arcor.de/ccyrny/djangology/ (my Django Reinhardt site; 
in German)


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Re: [Gimp-user] Pan Tool keyboard shortcut

[Claus Cyrny]

Hi Dave,

Dave M G wrote:
> Sven,
>
> Thank you, sort of, for responding.
>   
>> Did you see a Pan tool somewhere in the toolbox or in the Tools menu?
>> No, you didn't.
you can pan by clicking on the middle mouse button (MMB) and then
moving the cursor, which changes to a hand, around the image.

HTH,

Claus

-- 
Home Page: http://home.arcor.de/ccyrny/ (Photographs)
Blog: http://grafomatic.twoday.net (in German)
"Djangology" http://home.arcor.de/ccyrny/djangology/ (my Django Reinhardt site; 
in German)


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Re: [Gimp-user] GIMP throwing away TIFF tags

[Claus Cyrny]

scott s. wrote:
> Paul Surgeon wrote:
>   
>> Ok so let's throw the tags away.
>> Is there anyway to get GIMP to use libgeotiff instead of libtiff?
>> libgeotiff is built on top of libtiff.
>> I have to touch up hundreds of aerial photos and it's a PITA to have to save 
>> and then reapply the projection every time I save an image in GIMP.
>>
>> Avenza Systems sell a Photoshop CS plugin called "Geographic Imager" that 
>> handles GIS formats but it also does far more than what I need and am 
>> willing 
>> to pay for ($600).
>>
>>   
>> 
> I also wish there was an option to keep Geotiff tags in images.  At 
> least the current
> version of GIMP I use only raises 3 errors, vs the many errors I got in 
> the past.
> IIRC the last time I asked about it I was told to write my own plugin.
>
> scott s.
> .
>
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>
>   

Maybe 'listgeo' 
could help you on that. Found it via Google.
 
Claus

-- 
Home Page: http://home.arcor.de/ccyrny/ (Photographs)
Blog: http://grafomatic.twoday.net (in German)
"Djangology" http://home.arcor.de/ccyrny/djangology/ (my Django Reinhardt site; 
in German)


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[Gimp-user] 16-bit support/color management

[Claus Cyrny]

Hi,

after reading through a number of old posts to the devel-list,
I subscribed to this list again (after some time of absence),
because I'm not a programmer/developer, but a user.

With the advent of new bitmap editors like CinePaint (ok,
basically not for stills, but for 35mm film), Krita or
Pixel, which are available for Linux (I am working under Ubuntu
"Breezy" at the moment, and am about upgrading to "Edgy"
sometime next month), I'm asking myself what the current state
of the development of 16-bit support & color management for the
Gimp is. (All of the above mentioned programs do include those
features, as does Photoshop. I don't want the Gimp to become a
second Photoshop, since the interface basically has a different
approach, but I guess that, after so-and-so  many years of delay,
it's important to finally include those features. Otherwise I am
foreseeing a major shift particularly of pro users to other
programs.)

Last year I read in a preview of Gimp 2.4 that 16-bit/channel is
supposed to be included in v 2.4. My questions: a) Is this correct,
and b) Are there any rough 'directions' for Gimp development?

I'm hoping that this isn't off-topic for the 'users' list, but as
I said, I'm just a user (so far) with little experience in
programming, so it made no sense to me to subscribe to the devel
list.

TIA,

Claus
-- Home Page: http://home.arcor.de/ccyrny/ (Photographs) Blog:
http://grafomatic.twoday.net (in German) "Djangology"
http://home.arcor.de/ccyrny/djangology/ (my Django Reinhardt site; in
German)

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Re: [Gimp-user] Copy the alpha channel from an image to another

[Claus Cyrny]

Hi,

Germain Le Chapelain wrote:
>  
> Hi,
>
> I feel like my question might be very stupid :
>
> I would like to know who to copy the alpha channel of an image to
> another image.

Simpy select the alpha channel with 'select all' ([CTRL]+A)
and copy it into the clipboard. Then go to the second image
where you want to insert the alpha channel, select the image
([CTRL]+A again), and copy this selection into an alpha channel
('Select > Save to Channel'). Then just select this new alpha
channel in the 'Layers/Channels' menu and paste the alpha channel
([CTRL]+A, [CTRL]+H) from the clipboard into it. That's all.

HTH,

Claus


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