[Gimp-developer] Gaussian highpass filter
Hello,
I'm sorry if this is not the proper place to post this , but I have a
question and I hope some of you may be able to help me, so here goes:
I need to apply a gaussian high pass filter on a grayscale image represented
as a pixel matrix.
After doing some reading I understand that I need to a pply a transformation
matrix on each pixel of the image, actually a transformation vector in two
passes, once for the x axis and once for the y axis resulting in something
like(for a row, for example):
transofrmationSum = the sum of the transformationVector elements
for (i=0, ipixels.size; i++) {
for (j=0, jtranformationVector.size; j++) {
pixels[i] = pixels[i] +
pixels[i+(j-transformationVector.size/2)]*transformationVector[j]/transformationSum
}
}
Please tell me if this is correct and how do I compute the transormation
matrix for the gaussian high pass filter.
Thank you,
Daniel
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Re: [Gimp-developer] Silent profile embedding.
Hi, On Sun, 2009-02-08 at 20:03 +0100, Martin Nordholts wrote: I agree that someone should sit down and specify exactly how we want color management to work before doing major surgery. Yes. We absolutely need a document that describes the workflows that are handled by the current implementation. Then we need some test images that can be used to verify that everything works as it is supposed to. Any volunteers? However, reverting that commit is not major surgery and to me writing an sRGB profile in the absence of an embedded profile is just plain wrong. If something like that was supposed to done it should at least be the RGB profile selected in the Color Management preferences, but even doing that would be making hasty assumptions. Well, choosing a working profile other than sRGB is totally unsupported and will definitely lead to bad results. But you are correct, the PNG plug-in is doing the wrong thing here and we should revert that change. Probably even in also in the gimp-2-6 branch. Sven ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Silent profile embedding.
Hi, On Mon, 2009-02-09 at 05:52 +0900, Yoshinori Yamakawa wrote: See the following image: http://cue.yellowmagic.info/softwares/images/gimp_profile_status_comparison.png In case of using the GIMP and any other softwares, handling the image without color profile is very important. Ah, I think I understand now. The idea behind your changes is good and we should implement something like this for 2.8. But the wording you have chosen in your implementation is very misleading. Untagged RGB will be confused with tagging for data resources. We should better use a title like No Embedded Color Profile. And the working space profile is not used temporarily. We need to find a better phrase to describe that GIMP uses the default workspace profile due to the fact the the image has no embedded color profile. Sven ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
[Gimp-developer] Gimp on a Commercial CD-Rom ?
Hi, I work for a company that is interested in including Gimp on a CD-Rom. The CD-Rom will also have custom photo frames and clip art. The inclusion of Gimp is meant to save the effort of downloading the Gimp software since this product is aimed at kids who may not have internet access. Can anyone direct me to who I can contact for permission? (Apologies if this is the wrong mailing list. Is there another mailing list I should post to instead? I didn't want to spam the mailing lists and thought the developer mailing list was the most logical place). Thanks! Jack This message contains information proprietary to our company. It is intended to be read only by the individual or entity named above or their designee. Any distribution of this message or the information contained herein without written permission from our company is strictly prohibited. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Gimp on a Commercial CD-Rom ?
Am Dienstag, den 10.02.2009, 16:31 -0500 schrieb Jackson Tam: Hi, I work for a company that is interested in including Gimp on a CD-Rom. The CD-Rom will also have custom photo frames and clip art. The inclusion of Gimp is meant to save the effort of downloading the Gimp software since this product is aimed at kids who may not have internet access. Can anyone direct me to who I can contact for permission? You don't need permission as long as you follow the rules of the license. As Gimp is under the GPL the most important rule is to add the source code on the CD too. Regards, Tobias P.S. The Gimp Team is always very thankful for donations. ;) http://gimp.org/donating/ ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
[Gimp-developer] Gimp on a Commercial CD-Rom ?
Hi Tobias, Yep, we are planning on making a donation :-). Thanks for the reply and I hope you could help me with a few more questions. It would be greatly appreciated. 1. Can you tell me what the source code we need to include looks like specifically? If we were to simply include the Gimp installer (the setup.exe file), the source code is already packaged inside, right? 2. Do you know if this permission applies internationally too? We're interested in distributing to the US, Mexico, and maybe Europe. 3. Is the 2007 GPL the most current? 4. And lastly, do I need to contact anyone else besides you? (The company I work for is a bit afraid of GPL's since there is no direct contact person. So we want to cover all bases). Thanks for all of your help! Jack This message contains information proprietary to our company. It is intended to be read only by the individual or entity named above or their designee. Any distribution of this message or the information contained herein without written permission from our company is strictly prohibited. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Gimp on a Commercial CD-Rom ?
On Wed, Feb 11, 2009 at 4:44 PM, Jackson Tam j...@sditech.com wrote: Hi Tobias, Yep, we are planning on making a donation J. Thanks for the reply and I hope you could help me with a few more questions. It would be greatly appreciated. You might find this page (and the entire site, actually) useful: http://www.gnu.org/licenses/licenses.html Chris ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
[Gimp-developer] brush rotation - abotu the chanegs on 10-feb-09
Hi, I am aware that it is a work in progress -- just to let you know (Alexia and others) - the changes in the two commits dated 10-feb-2009 got things a lot worse and less natural for me than it was before. I am nto complainign, I know a lot of tunning is getting in, and I am writing this just for feedback while you adjust it. Now, I f I paint slowly, the brush will suddenly reverse its angle - Also, if I mark the direction x angle dynamic, the painting angle does nto feel natural, and it felt before - at least when I use a brush that is oriented towards up like an up arrow, or the letter A - both behaviores were better previously. Regards, js -- ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Gimp on a Commercial CD-Rom ?
On Tuesday 10 February 2009, Jackson Tam wrote: 1. Can you tell me what the source code we need to include looks like specifically? If we were to simply include the Gimp installer (the setup.exe file), the source code is already packaged inside, right? Unless someone here can give you a better answer, maybe ask the windows packager at http://gimp-win.sourceforge.net/contact.html . But sinze the ...setup.exe is about the same size as the source code packages themselves, I don't think they can be included already. You can find the sources linked from the gimp-win home page (the link named Releases). There select the release you're interested in and get the source packages (architecture: platform independent, usually just archives in some format), gtk+, babl, gegl and gimp, maybe the libexif there as well. 2. Do you know if this permission applies internationally too? We're interested in distributing to the US, Mexico, and maybe Europe. The GPL is a license that grant you extra rights (beyond use and those rights you have in each country anyway), if you agree to it. Its creators do their best to make it as widely applicable as possible, but, as Chris wrote, have a look at their site for more information. 3. Is the 2007 GPL the most current? There's no 2007 GPL (only versions, like 2 or 3), the relevant one is the one found in the LICENSE and COPYING files in each source package. (AFAIK it's version 2 or later for the current releases.) 4. And lastly, do I need to contact anyone else besides you? (The company I work for is a bit afraid of GPL's since there is no direct contact person. So we want to cover all bases). The GPL is kind of an agreement between all the authors (so there cannot be just one contact in most cases) of a program and its users. The authors offer the users the GPL's conditions. If the users accept, they can redistribute and copy the program (under these conditions). If they don't, they don't gain the right to copy the software and no harm is done to anyone. (You and your company are the users in this case.) It's your choice to either accept the conditions or not. I am not a lawyer, but that's basically how I understand the GPL and explain it to people :) And there's no reason to be afraid of it, the GPL is not there to restrict usage or distribution, but just tries to guarantee this freedom to your customers as well. So as long as you tell them Hey, GIMP is free, just copy it and give it to your friends as well if you want. probably nobody will bite you. Daniel signature.asc Description: This is a digitally signed message part. ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
[Gimp-developer] LGM and development opportunities
Hi all, This is an exploratory email for all teams participating at LGM. There are more questions than answers and everything is in discussion at present time. In the end we need the input of each team. Here's the punch! I had a very productive discussion with René Barsalo at the SAT on Monday about next LGM. Summary: For next LGM we could have at least two projects working a full day at SAT: Blender and Hugin. The SAT immersive projection equipment would be available to both teams for direct work, hacking, presentations, etc.. Starting at 11:00 the day would be followed by a LGM 5 to 7 where all the teams would gather for a beer. So far we have thought of Thursday to be that day. So, second day of LGM. We need to know if this would appeal to the development teams of Hugin and Blender. Although I trust this event can only add to the interest of LGM, and also noting that this is in no way competing with Polytechnique's facilities — only a big plus to have the SAT in Montreal and to have LGM in Montreal... I think we need to find out if there are any objection to this proposal. I ask Blender and Hugin people to step in. Guys! Tell us what you think. To all other, please do the same! Speak up! Cheers! Louis LGM 2009 main organiser Montréal GMT -5 ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Gimp on a Commercial CD-Rom ?
You don't need permission as long as you follow the rules of the license. As Gimp is under the GPL the most important rule is to add the source code on the CD too. By the way, isn't it enough to publish it on the net? E.g. one could provide a link to the gimp website for the original source, plus publish their modification on their own website (or include only these parts on the CD)? The Linux kernel is also GLP, but the majority of Linux CD distributions does not ship the source. Regards, Alpar ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Gimp on a Commercial CD-Rom ?
On Wednesday 11 February 2009 08:46:26 Alpár Jüttner wrote: You don't need permission as long as you follow the rules of the license. As Gimp is under the GPL the most important rule is to add the source code on the CD too. By the way, isn't it enough to publish it on the net? E.g. one could provide a link to the gimp website for the original source, plus publish their modification on their own website (or include only these parts on the CD)? Pointing to gimp website is not enough. They must provide the version of the source, tha binary is built from, from their own servers and yes, link to it is enough if they do not wish to use the space on the disk for a tarball. The Linux kernel is also GLP, but the majority of Linux CD distributions does not ship the source. No, but they have to provide it from their repros and they do AFAIK. ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Silent profile embedding.
On Tue, 10 Feb 2009 20:24:34 +0100 Sven Neumann s...@gimp.org wrote: Untagged RGB will be confused with tagging for data resources. We should better use a title like No Embedded Color Profile. Untagged is used in Adobe Photoshop. I think that the other phrase may be used, but, individually, I wants more short phrase. And the working space profile is not used temporarily. We need to find a better phrase to describe thatGIMP uses the default workspace profile due to the fact the the image has no embedded color profile. I think that is temporarily *for the image*. The image and a workspace are less related by the GIMP. After editing the image, that relation will be lost. When re-opening the image with the GIMP, the image will be related with the workspace that specified at the time. If I use the other phrase, it is as follows: GIMP assumes that Adobe RGB (1998) (workspace profile) is embedded. -- Yoshinori Yamakawa y...@yellowmagic.info ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
