Quite a lot going on since the last posts. Frequency domain chroma became more polished in the meanwhile, and is now part of darktable 2.4.0rc0. Needless to say that this is a nice milestone for me. 😀
I take the occasion to link to a more functional description of the algorithm, for the geeks out there.
As the next step, I'm now looking into performance improvements. Maybe symmetric properties of the filter kernels can be exploited, and probably SSE2 is a good option. More to come...
