On Sun, 15 Jul 2012 00:54:50 -0700, Martin Jambon wrote: > On 07/14/2012 03:56 PM, Robert Krawitz wrote: >> On Sun, 15 Jul 2012 01:19:52 +0400, Alexandre Prokoudine wrote: >>> On Sat, Jul 14, 2012 at 12:35 PM, Martin Jambon wrote: >>>> Hi, >>>> >>>> I am totally new here but I wrote a standalone program that does a >>>> decent job of removing purple fringing from photos, and I would like to >>>> be able to implement the same functionality for Gimp. >>>> >>>> Here are some examples of what it does: >>>> >>>> http://mjambon.com/purple-fringe/examples.html >>>> >>>> My algorithm needs to perform pixelwise operations (+, -, min, max >>>> between two channels; scaling of one channel) but I also would prefer >>>> something that is easy to install (for users) and easy to maintain (for me). >>>> >>>> The OCaml source code is here; it should give an idea of what's needed: >>>> >>>> https://github.com/mjambon/purple-fringe/blob/master/src/unpurple.ml >>>> >>>> (see functions make_purple_blur and remove_purple_blur, lines 103-177) >>>> >>>> >>>> My questions are: >>>> >>>> 1. Is it possible to do that using a Gimp script? >>>> >>>> 2. If so, Scheme or Python? >>>> >>>> 3. If a plugin makes more sense, will average users be able to install >>>> it for themselves or would I have to wait for the inclusion in some >>>> standard precompiled distribution? >>> >>> Just in case, are you aware of http://kcd.sourceforge.net/fix-ca.php ? >> >> BTW, Martin, I'd suggest optimizing it -- 1 second/megapixel is a fair >> amount of time for someone processing a lot of 18 MP images, and people >> with Nikon D800's will be even more unhappy. You may also want to talk >> with the ImageMagick folks about getting it included there. This could >> become a very important part of a photographic workflow. > > Right. I'd like to try built-in implementations of blur algorithms > first, since it is likely to remain the bottleneck of my algorithm. If > that's not enough, some parallelization should help. Have you profiled the code yet? -- Robert Krawitz <rlk@xxxxxxxxxxxx> MIT VI-3 1987 - Congratulations MIT Engineers men's hoops Final Four! Tall Clubs International -- http://www.tall.org/ or 1-888-IM-TALL-2 Member of the League for Programming Freedom -- http://ProgFree.org Project lead for Gutenprint -- http://gimp-print.sourceforge.net "Linux doesn't dictate how I work, I dictate how Linux works." --Eric Crampton _______________________________________________ gimp-developer-list mailing list gimp-developer-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gimp-developer-list
