On 9/15/07, John Fremlin <john@xxxxxxxxxxx> wrote: > Yesterday I decided to implement the retinex algorithm described by > John McCann in 1999 as a gimp plugin. > > I am using Python (in particular numpy for the main calculations) and > consequently chose to put in some modifications to the algorithm to > make it more efficient, but it makes generally the same effect as that > described in > > Brian Funt, Florian Ciurea, and John McCann "Retinex in Matlab," Proceedings of the IS&T/SID Eighth Color Imaging Conference: Color Science, Systems and Applications, 2000, pp 112-121. > > http://www.cs.sfu.ca/~colour/publications/IST-2000/index.html > > As this is my first foray into gimp plugging in, I'd appreciate if > someone could look over the code. Is there a more efficient way of > getting out one colour channel of the image at a time? At the moment I > read in the whole image which takes a lot of memory. plug_in_decompose decomposes the image into a layer per channel. > > Searching the archives today I notice that Pedro Paf was suggesting > implementing it as a Summer of Code project - as the algorithm is very > simple (a day to make even starting no numpy or Gimp python > knowledge), what enhancements where being contemplated? I find this odd -- your whole email odd, in fact, because -- there is already a retinex plugin (found at Colours->Retinex; plug-ins/common/retinex.c in the GIMP source tree.). If you want to add some enhancements, perhaps you could check that out first. _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
