Le sam. 5 sept. 2020 à 11:55, Bill Martz <broccoli.salad.s...@gmail.com> a écrit :
> I will have to dig through my Pixls posts to find this, but I posted about > a problem using channel mixer, and I received that suggestion in reply. I > tried it, and it fixed the problem as far as I could tell. I will see if I > can find it tomorrow. > Putting the channel mixer after the filmic module will "solve" the clipping problem, but remember that channel mixer is doing a matrix multiplication. When you multiply in a linear space like we have before fimlic, you are doing a scaling, but when you multiply in a log space like what we have after filmic, it becomes like raising the values to a power, which will mess around with the contrast. If the adjustments are small, maybe this won't matter too much in practice, but I was just warning from a maths perspective, it could become problematic especially for larger adjustmentd. The ideal situation is to do those sorts of scaling and rotation transformations in a linear space without doing any clipping, then at the end of those transforms you apply your non-linear look transform using filmic/tonecurve/basecurve/whatever. ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
