On 07/15/2012 08:14 AM, Robert Krawitz wrote: > 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? Yes, but it's written in OCaml and I expect to rewrite it completely in order to fit in the gimp dev environment. The algorithm is not very complicated and I'm hoping to use optimized high-level primitives. Martin _______________________________________________ gimp-developer-list mailing list gimp-developer-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gimp-developer-list
