Re: [Gimp-user] Removing a layer (part of jpg) from graphic.

2010-02-07 Thread Cédric Gémy
> I have a .jpg graphic that I want parts of it removed. I am new to Gimp, can
> anyone help/guide me how to do that.
> Thanks
> 

The trouble is to know what the part you want to remove looks like. And
it can sometimes take a while (see Re: how to invert greyscale values
only... (Rich Evans)) depending on the complexity of the subject.

Anyway, your question says layer, and i'm surprised since jpgs don't
handle layers.

pygmee

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Re: [Gimp-user] how to invert greyscale values only...

2010-02-04 Thread Cédric Gémy
"Duplicate layer, invert bottom layer and cut all blacks and whites out 
of (transparent) top layer (of course, if there's a range of greys it 
gets more complicated)."

it's evident that this is the problem : i don't know about Rich's photo
but the sample i use here have various flavors of blacks'. If it is not
a simple Color2alpha should work to delete blacks and just add a white
layer below :)

i guess this is not the case :)

Rich : Try Gmic Toolbox>Colors>Replace color select black as original
and white as dest and play with smoothness. Is that good ?

!! It's not working exactly the same as Gimp's replace color!!


find gmic here : http://gmic.sourceforge.net/
this is a external filter addons with so many possibilities :)

pygmee

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Re: [Gimp-user] how to invert greyscale values only...

2010-02-02 Thread Cédric Gémy
not completely satisfied with sven's method, working on some pictures
but not any, depending on the shades.
I used to do it in CMYK a long time ago with photoshop by just pushing
the image to CMYK and inverting the K curve.
I guess something might be done with decompose color filter or so. But
the quicker/best average i've found is just adding a mask based on the
layer (L from Lab or N form CMYK could be used too), and play with the
curve to adapt to the shades+refine with brush on mask. It takes few
seconds if the picture is not too complex. Then put a white layer below
and it's quite done. 
But i'm not completely satisfied with it.

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[Gimp-user] Hue GUI

2010-01-30 Thread Cédric Gémy
lo
I've just seen this screenshot of a forthcoming new node in blender and
i find this rainbow UI really nice because it lets you quite easily (gimp 
curve-like) modify any hue of the document. 
I let you check this :
http://mke3.net/blender/devel/2.5/hue_correct_node.jpg
or
http://mke3.net/blender/devel/2.5/hue_correct_hue_val.jpg

pygmee 

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Re: [Gimp-user] GIMP vs Photoshop

2010-01-20 Thread Cédric Gémy
I don't remember how this discussion has turned to a GUI discussion just
as if the hugest difference wetween the two was this point.
Anyway, Gimp is great, and photoshop has many default too. It also tries
to implement new GUI possibilities, but they sometimes shouldn't, i
guess :)

"Most people thinks having two different menubars in one application is 
insane. The small amount of people that thinks it is a good idea will 
have to maintain code for that themselves, sorry."

One thing that might be interesting is having contextual menu which is
really contextual to image areas we're on, instead of a simple duplicate
of main menu. WOuldn't be a second menu, but just an extract of
immediate main applicable functionnalities.

pygmee 


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[Gimp-user] Re : GIMP vs Photoshop

2010-01-14 Thread Cédric Gémy
This is a common question. The question is not what a software does, but
what you really need. Then you'll find the software by testing it for a
long time (i'm not sure photoshop 30 days is enough)

IMO Photoshop doesn't really supports 16bit and CMYK just because when
you switch to these modes, a huge amount of functionnalities are made
unavailable. The workflow is working in RGB as long as possible then
export.
RAW pictures can have higher bit-depth but you can use ufraw
(gimp-plugin) or rawstudio (simple), digikam (use too) to manage this.
IMO too, Photoshop doesn't really handles RAW, which is the job of
Camera raw (in fact using the dcraw library like digikam and ufraw) or 
Lightroom in adobe's product.

If you just begin, try gimp and if it doesn't match, you can try
photoshop later. Any knowledge you'd have get in Gimp will still true in
photoshop. Personnaly i used to be a photshop teacher and i switch completely a 
long time ago, but you're not me.

Mainly Proprietray ecosystem try to phagocytate many applications ...
Free ecosystem is working with more specialised tools (qtpfsgui, hugin, 
digikam) which complete the workflow). 

pygmee


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[Gimp-user] Re : gimp brushes from abr ?

2009-12-30 Thread Cédric Gémy
Just put the .abr file in your $HOME/.gimp-2.6/brushes. Relaunch gimp
and it might be OK.

Unfortunately, i feel that Gimp is running much slower when such brush
set are loaded. It seems to me that gimp loads them all at launch time.
Is there any caching that would allow to have them available but not
loaded full-res until we need them ?

pygmee 

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Re: [Gimp-user] Native Support for SVG

2009-12-17 Thread Cédric Gémy
It seems that my message has been sent several time. I don't know where
it comes from, please apologize for this.

actual i don't have any idea of how vector layers have been implemented
to Gimp. I guess the most important thing is not that vector property of
the layer. 
IMO, having vector masks (whose mask would be linked to a path) would
already be a very good improvement.


pygmee

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Re: [Gimp-user] Native Support for SVG

2009-12-08 Thread Cédric Gémy
There is no non-sense that Inkscape supports some bitmap operations and
also no nonsense that a bitmap applications support some vector
possibilities simply because in many project, you simply need to mix
vector and bitmap datas.

a logo on a photo for example : and if the logo can be kept vector
that's much better. if the photo don't need any modification, yo ucan
simply load it into Inkscape (except that inkscape doesn't deal with
import resolution), but in the other case, it will be more comfortable
to open the vector logo in Gimp.

Anyway, gimp works on vector layers since a long time and it's on a good
way. SVG import has been improved in the last realease and will go on.

Just a question : text tool is a vector tool. Would you tell gimp don't
need it ?

pygmee 

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[Gimp-user] Tinting brushes

2009-12-01 Thread Cédric Gémy
I'm searching for a way to tint a phot-based brushes. What i found using
Gradient option of any brush tool is that the color of the gradient are
filling the shape of the active brush shape. What i'm looking for is
something that would replace the brushes values by a color. Just as if
you were modifying tint from the color menu, but this directly in the
brush tools.

pygmee 

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