Hello,

 

I'm trying to get UPLab up and running:

http://brucelindbloom.com/index.html?UPLab.html

using the LCMS compatible ICC profile version (see page down below).

 

If I just transform twice, an empty round trip Lab>UPLab>Lab, in float mode, 
I'd expect the colors not to change as long as there are no challenging gamuts.

However the greens are a little bit washed out and especially on pink color 
gets pretty desaturated:

http://www.visualbakery.com/RawTherapee/Download/StdVsUPLab.jpg

(watch the pink with the leaves on it on the circle)

 

I already tried the Lab2 vs. Lab4 functions and several intents, no help.

 

My first guess would be that there is some trouble with a LUT point?

 

Thanks in advance

Oliver

 

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