Hi, On 18.12.2013 at 10:29 PM Joao S. O. Bueno wrote:
It looks like this still remains to be rewritten for GEGL?
Looking at the [GEGL porting matrix] you are right.
(what lead me to do this? I've hit the "retinex" filter description while translating the GIMP manual, and went happily to gimp master to check how retinex would behave in a 32 bit per channel image - just to find it was not there)
I just tried with a quite current master build on Linux and found it at the end of the Colors menu. You can find the code in GIMP 2.8 and master sources - it's /plug-ins/common/contrast-retinex.c. I looked in the help and found the [webpage of the plug-ins author]. It seems the algorithm dates back to 1996, which is quite old and in the meantime there happened [further research] about the topic. IMHO to go with GIMPs product vision to provide cutting-edge and fast algorithms it should considered to first check whether now exist improvements to the 1996 Retinex algorithm (resp. Rahman Tone-mapping operator). Perhaps there's also something usable in the former years' GSOC GEGL branches. The best would surely be if the potential contributor came to IRC and spoke with the devs. Kind regards, Sven [GEGL porting matrix]: http://wiki.gimp.org/index.php/Hacking:Porting_filters_to_GEGL [webpage of the plug-ins author]: http://www-prima.inrialpes.fr/pelisson/MSRCR.php [further research]: http://scholar.google.com/scholar?q=multiscale+retinex&hl=de&as_sdt=1%2C5&as_ylo=1996&as_yhi=2013 _______________________________________________ gegl-developer-list mailing list List address: gegl-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gegl-developer-list
