Re: [Gimp-developer] Purple fringing removal extension

[Robert Krawitz <rlk alum mit edu>]

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.
-- 
Robert Krawitz                                     <rlk alum mit edu>

MIT VI-3 1987 - Congratulations MIT Engineers men's hoops Final Four!
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