CA correction issue


(nosle) #21

Yep. It desaturates the image and may cause slight colour shifts. Noise reduction is similarly tricky to use. I now try to be minimalist with the applied modules and only use required ones.


#22

Thank you, didn’t know. So once you’ll commit the lensfun ca improvement i’ll try to use it and i’ll profile some lens i haven’t yet profiled.

Would be nice to add what you wrote in the rawpedia page: http://rawpedia.rawtherapee.com/Chromatic_Aberration


#23

@agriggio if you want I build ca-correction-before-distortion for W64, could you merge dev into it?


#24

Now I remember! Loss of saturation and color shift is exactly the reason why I stopped using automatic CA correction.

agriggio, as I understand that you are the developer of this function, do you plan to develop a fix for this problem? If so, how can I be warned when it is ready, so that I can test it?


(Alberto) #25

I’ll reply here when (and if) the branch gets merged into dev. but just to clarify, I have nothing to do with the auto ca correction in raw, I have never looked at that code, so if you were talking about that, I’m afraid I won’t be of any help…


#26

I’ve tried to see what happens with darktable 2.4.4 . Seems to me there is a similar problem.

On the left auto ca, on the right lensfun ca.