Today some images randomly on clicking from browser or film strip, appear to be desaturated, as if ‘neutral’ processing was selected. No other processing done, straight from opening. Using bundled “Noise Reduction Low” profile.
Preview or open same image in RT 5.8 and all is exactly the same as the other nearby images. Canon 6D Mk II, .CR2 files. The tone curve in RT and ART appear quite different.
Hi, the auto-matched curve in art uses a slightly different logic, it was changed to better deal with some corner cases. I guess it doesn’t work so well here though
Would you be able to share a raw file that shows the problem? Thanks!
Hello, the tone curve of 0333 looks a bit strange in the shadows part. Copying the tone curve of 0344 to 0333 delivers a correct image. Applying a curve ‘by hand’ works as well.
As Alberto said, the auto-algorithm didn’t do its job like it should do.
All auto-buttons in photo software have one thing in common: they don’t always auto-work. QED !
Yep, nothing is perfetc I was just surprised that some very similar images came out so differently. Also, in RT 5.8 that they all came out OK. All were taken as RAW only, no camera JPGs but I’ve never seen that kind of curve from a native JPG either.
If Alberto prefers to keep the current logic I can fall back on copying a curve from one of the good frames or revert to RT if need be.
I wonder if anyone else has seen a similar effect or if the lighting/colours yesterday were just in the wrong combo for the current logic to cope with.
Yes I have had a few images like that, using the auto match tone curve. Sometimes the lowest few points in the shadow section of the tone curve look too high, so it makes the image lack contrast and saturation. But it is only occasionally…
I will try and dig an example out if it helps…
The picture is of some soap being made, in case you were wondering what it was.
The auto matching generally works well, in my experience it is more likely to be tripped up by photos where there are very few dark / near black tones.
I haven’t tried it in RawTherapee - I am trying to move towards learning to use one piece of raw processing software rather than half a dozen, and continually comparing them…