[Gimp-user] Script to change opacity of a layer
Hi, I need a script that changes the opacity of a layer and then saves the whole image as a PNG file. So I wrote the following script: #!/bin/sh gimp -i -b - EOF ( let* ((image (car (gimp-file-load 1 test.xcf test.xcf))) (drawable (car (gimp-image-get-active-layer 1 (gimp-layer-set-opacity drawable 50) (let* ((new-layer (car (gimp-image-merge-visible-layers image EXPAND-AS-NECESSARY) (gimp-file-save RUN-NONINTERACTIVE image new-layer test-40.png test-40.png) (gimp-quit 0) ) However, an error message appears saying error: eval: unbound variable new-layer. So what am I doing wrong here? Thanks for your help!! Sabine -- professor (via www.gimpusers.com) ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Magic-lasso tool?
On Mon, Aug 17, 2009 at 10:07 AM, Dotan Cohendotanco...@gmail.com wrote: I have last used an image editing program several years ago, I think it was photoshop. It had a magic-lasso tool that would snap to areas of different colour, and make selecting objects very easy. Does gimp not have such a tool? I cannot find it. Thanks. Try the scissors tool? I also make frequent use of the 'select by color' tool... Chris ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move image when selecting?
On Monday 17 August 2009, Dotan Cohen wrote: When I am selecting an area with the freehand select tool, how can I move the image shown? Hello Dotan, try pressing the space bar. Then the mouse should move (or more specifically pan) your view of the image when no mouse button is pressed. I think that this is what you want :) But maybe the navigator in the bottom right corner of the image window works better for you. Just try them out. Daniel signature.asc Description: This is a digitally signed message part. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Magic-lasso tool?
On Monday 17 August 2009, Dotan Cohen wrote: I have last used an image editing program several years ago, I think it was photoshop. It had a magic-lasso tool that would snap to areas of different colour GIMP has magic scissors instead of lassos :) signature.asc Description: This is a digitally signed message part. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Scaling a foto
Dear all, I have a question and maybe it is easy to answer and has been answered before although I didn't find it in the FAQ's. When I try to scale a foto in order to get it passport photo size it looses quality. The fotos I want to scale are of good quality but too large and are showing not only the head and upper chest of people but often more and so I have to cut them which is possible without any problem and then scale them in the format I need. I would understand the loss in quality if I would try to enlarge the fotos but making them smaller in size should not make them loose quality??? Any hints from you out there? Thank you in advance for any answer. Best wishes Monika ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Batch processing resizing images
Probably an old question, but since I am new to this list I just post it. How do I batch process files in gimp and resize the images while keeping the aspect ratio of the original file. I modified the batch processing example on the Gimp web pages, but it just doesn't work. I have included the modified script below. As you can see I try to resize the images to a maximum size of 1920x1200px. (define (batch-unsharp-mask pattern radius amount threshold) (let* ((filelist (cadr (file-glob pattern 1 (while (not (null? filelist)) (let* ((filename (car filelist)) (image (car (gimp-file-load RUN-NONINTERACTIVE filename filename))) (drawable (car (gimp-image-get-active-layer image))) (width (car(gimp-image-width image))) (height (car(gimp-image-height image))) (scale min( (/ 1920 width) (/ 1200 height))) (xsize (* scale width)) (ysize (* scale height))) (plug-in-unsharp-mask RUN-NONINTERACTIVE image drawable radius amount threshold) (gimp-image-scale image (floor xsize) (floor ysize)) (gimp-file-save RUN-NONINTERACTIVE image drawable filename filename) (gimp-image-delete image)) (set! filelist (cdr filelist) -- Kind regards / Vriendelijke groeten, Eric van Oorschot Prinsenbeek ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Batch processing resizing images
Hi, On Mon, 2009-08-17 at 20:27 +0200, Eric van Oorschot wrote: How do I batch process files in gimp and resize the images while keeping the aspect ratio of the original file. I modified the batch processing example on the Gimp web pages, but it just doesn't work. It would help a lot if you told us what exactly does not work. Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move image when selecting?
2009/8/17 Chris Mohler cr33...@gmail.com: On Mon, Aug 17, 2009 at 10:05 AM, Dotan Cohendotanco...@gmail.com wrote: When I am selecting an area with the freehand select tool, how can I move the image shown? I need to select an area that is larger than my screen size. Zooming out is not an option because I need the precision that zoom gives me. Thanks. Try middle-mouse or space bar... Thanks, Chris, but what I am looking for is a way to pan while selecting. As I cannot release the left mouse button (I have not selected all that I need to select) I need to pan with it depressed. -- Dotan Cohen http://what-is-what.com http://gibberish.co.il ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Magic-lasso tool?
Try the scissors tool? I also make frequent use of the 'select by color' tool... The select by colour tools was having trouble with this spot, but magic scissors works great. Thanks! -- Dotan Cohen http://what-is-what.com http://gibberish.co.il ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move image when selecting?
On Mon, Aug 17, 2009 at 2:21 PM, Dotan Cohendotanco...@gmail.com wrote: 2009/8/17 Chris Mohler cr33...@gmail.com: On Mon, Aug 17, 2009 at 10:05 AM, Dotan Cohendotanco...@gmail.com wrote: When I am selecting an area with the freehand select tool, how can I move the image shown? I need to select an area that is larger than my screen size. Zooming out is not an option because I need the precision that zoom gives me. Thanks. Try middle-mouse or space bar... Thanks, Chris, but what I am looking for is a way to pan while selecting. As I cannot release the left mouse button (I have not selected all that I need to select) I need to pan with it depressed. Let go, pan using either MMB or space, then continue making the selection. There's no penalty for releasing LMB early :) Chris ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Scaling a foto
Hi Monika, I haven't experienced a loss in quality with scaling photos smaller; as you mentioned, loss of quality will occur with enlargements. Are you scaling before you crop the photos? How are you scaling (I scale with Image-Scale Image). What are your original target sizes? Regards, Erik. Monika Himpelmann wrote: Dear all, I have a question and maybe it is easy to answer and has been answered before although I didn't find it in the FAQ's. When I try to scale a foto in order to get it passport photo size it looses quality. The fotos I want to scale are of good quality but too large and are showing not only the head and upper chest of people but often more and so I have to cut them which is possible without any problem and then scale them in the format I need. I would understand the loss in quality if I would try to enlarge the fotos but making them smaller in size should not make them loose quality??? Any hints from you out there? Thank you in advance for any answer. Best wishes Monika ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move image when selecting?
Let go, pan using either MMB or space, then continue making the selection. There's no penalty for releasing LMB early :) When I do that, as soon as I finish making the second selection (after the pan) I loose the first selection. -- Dotan Cohen http://what-is-what.com http://gibberish.co.il ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move image when selecting?
Hi, On Mon, 2009-08-17 at 22:36 +0300, Dotan Cohen wrote: Let go, pan using either MMB or space, then continue making the selection. There's no penalty for releasing LMB early :) When I do that, as soon as I finish making the second selection (after the pan) I loose the first selection. Are you using GIMP 2.6 or are you for whatever reason stuck to an older version? Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move image when selecting?
2009/8/17 Sven Neumann s...@gimp.org: Hi, On Mon, 2009-08-17 at 22:36 +0300, Dotan Cohen wrote: Let go, pan using either MMB or space, then continue making the selection. There's no penalty for releasing LMB early :) When I do that, as soon as I finish making the second selection (after the pan) I loose the first selection. Are you using GIMP 2.6 or are you for whatever reason stuck to an older version? GIMP 2.6.6 -- Dotan Cohen http://what-is-what.com http://gibberish.co.il ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Scaling a foto
On 08/17/2009 11:33 AM, Monika Himpelmann wrote: Dear all, I have a question and maybe it is easy to answer and has been answered before although I didn't find it in the FAQ's. When I try to scale a foto in order to get it passport photo size it looses quality. The fotos I want to scale are of good quality but too large and are showing not only the head and upper chest of people but often more and so I have to cut them which is possible without any problem and then scale them in the format I need. I would understand the loss in quality if I would try to enlarge the fotos but making them smaller in size should not make them loose quality??? Any hints from you out there? Thank you in advance for any answer. Best wishes Monika Monika, I agree that it does not make sense to loose quality when scaling smaller. The only thing I can think of is that if the photos are JPEG / JPG (or some other lossy format then, *EVERY* time a photo is saved it looses quality. If somehow in the process you are saving it multiple times, then you might loose quite a bit of quality. With JPEG (that you want to keep as JPEG) that best method is probably to make a copy of the file and then open the copy in Gimp. Do all your work on it (scaling, cropping, etc.) WITHOUT doing any saving until you are DONE. Then save it. When you do that save, select the highest possible quality setting. If in the future you have to open the file for some reason (for example, printing) do NOT save it again in the process of closing it (unless you have specifically made some change that you really intend to save -- but understand you will lose some quality. If that is not the problem, then the situation really does sound odd. Jay ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move image when selecting?
Hi, On Mon, 2009-08-17 at 22:36 +0300, Dotan Cohen wrote: When I do that, as soon as I finish making the second selection (after the pan) I loose the first selection. There's always only one selection. Creating a selection will replace the current one. That has nothing to do with panning. If you want to add to an existing selection, then choose the Add mode from the tool options of the selection tool. Or use the modifier keys (as hinted in the status-bar). Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Gimp 2.2.17 Crash During File/Open.
Update on this issue. If I type "dbus-launch PathToGimp", gimp launches and the file/open works fine. Can anyone tell me if dbus was implimented in this new 2.2.17 version, or what exactly dbus does that gimp needs? Martin Cracauer wrote: Steven M. Dodier wrote on Mon, Aug 03, 2009 at 07:32:21AM -0600: Hello, Hoping someone can help resolve this problem. I have done searches of archives and web sites without much luck. I know this version is a little old, but I don't have any control over updating the installation. My problem is related to gimp (2.2.17). I can start gimp from an nfs export with no problems. I get the GUI, but when I select file/open, the application crashes with the following error: I had the same problem, some GIMP versions (but not others) would crash when using the File open menu. I solved it by deleting the appropriate *.so in that GNOME dir. In fact I had two similar segfault crashes and moved two *.so. Here's what got moved: /usr/lib/gstreamer-0.10-inactive: libgstvideomixer.so /usr/lib/inactive: libtrackerclient.so.0@ libtrackerclient.so.0.0.0 Note that the gstream and other dirs are searched recursively, you need to move things outside, it is not sufficient to just mkdir inactive mv offender.so inactive/. in that dir. Martin ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Scaling a foto
Jay Smith wrote: Monika, I agree that it does not make sense to loose quality when scaling smaller. I'm confused I think. Isn't scaling smaller an inherently lossy process? If there's information in a section that's 20 bits across and it gets reduced to 5 bits across it isn't possible to still contain the same information, is it? Patrick ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move image when selecting?
Sven Neumann wrote: Hi, On Mon, 2009-08-17 at 22:36 +0300, Dotan Cohen wrote: When I do that, as soon as I finish making the second selection (after the pan) I loose the first selection. There's always only one selection. Creating a selection will replace the current one. That has nothing to do with panning. If you want to add to an existing selection, then choose the Add mode from the tool options of the selection tool. Or use the modifier keys (as hinted in the status-bar). If you're trying to use the lasso it's frustrating like that, you have to do the whole thing in one complex wack. If instead you use the path tool you can keep adding the points to the path, edit them when you make a mistake, scroll the image around all you want, and then when you have it perfect convert the path the a selection. I think it's MUCH easier than the lasso. Here's a great tutorial on this, http://mailman.linuxchix.org/pipermail/courses/2005-March/001821.html. Patrick Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move image when selecting?
In my link to the selection tutorial I should have given credit to Akkana Peck whose tutorial it is, and noted that her book: Beginning GIMP: from novice to professional ROCKS And also she helps people out here all the time and deserves a lot of credit for being such a good citizen of the net. Patrick ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Scaling a foto
On 08/17/2009 06:38 PM, Patrick Horgan wrote: Jay Smith wrote: Monika, I agree that it does not make sense to loose quality when scaling smaller. I'm confused I think. Isn't scaling smaller an inherently lossy process? If there's information in a section that's 20 bits across and it gets reduced to 5 bits across it isn't possible to still contain the same information, is it? Patrick As you state it, my understanding is, yes. Scaling smaller is a lossy process. But at higher compression (more lossy) settings, JPEGs can be extremely lossy. Hopefully, however, when scaling smaller, there is adequate data in the image to not result in actual visible loss of quality in the image (other than it is smaller, etc.). However, my point was that if the user is one who, perhaps simply out of habit, saves every time they do anything, a JPEG can be turned from sharp and clear into visual mush after just a few saves. Back in the days when I was using Photoshop on Windows 95 on a 128 MB memory machine, I _did_ save every time I did anything simply because Windoze was going to crash -- it was not a question of IF it was going to crash, it was only a matter of WHEN. (But... I was editing TIFFs, not JPEGs, so there was no lossyness.) Jay ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Scaling a foto
On Mon, Aug 17, 2009 at 10:33 AM, Monika Himpelmannmonika_1...@yahoo.it wrote: I would understand the loss in quality if I would try to enlarge the fotos but making them smaller in size should not make them loose quality??? Any hints from you out there? Thank you in advance for any answer. Are the images in RGB mode? (Image-Mode-RGB) Scaling indexed images can cause problems... Chris ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
