Wow, I did not expected so many answers, thank you very much!
I am sorry for the delay.
Gargoyle, correctly, interpreted my aim accondingly to our previous discussion when I was asking how to modify an ICC Camera profile in order to tweak the colors...
At the end I successfully (thank everybody who helped me!) managed to tweak the camera profiles but I still had 2 big problems:
- The profiles where camera dependent, therefore changing camera and lighting condition everything would have varied a lot.
Absolutely, you'll need to learn all the different parameters. You have to experiment.
- When I had to convert the images back to a "normal" profile to send them around, like Adobe RGB, no matter what, the colors would have changed quite dramatically.
Knowing the gamut of camera profile, workspace profile and monitor profile are very different in size and shape you should not trust what you see on monitor. For conversion use absolute colorimetric. For viewing use simulate paper white. Probably that may help you a bit. There are many parameters to understand if you want to have better understanding and control. Research on ICC standards, its math and the algorithms , application software white papers and etc.
So now I am trying another way...
My aim with the abstract profiles is the creation of a series of profiles with the pure aim of tweaking the colors, not to refine another profile previously created.
Unfortunately I don't have all the technical knowledge as you do (but I am beginning to read some books on the subject) but, from what I understood, abstract profiles should not be connected to a specific camera or camera profile as they work in LAB...
Photoshop supplied abstract profiles are colorspace independent. Unfortunately this is not the case with refine tool from Argyll. The purpose of Argyll is too tweak the Source profile to match the closely to the color behavior of the Target colors or profile in the form of Abstract profile use for color correction of the source. I have to confess I haven't read thoroughly regarding the refine tool. You have to check Argyll document if you can omit RGB and work entirely in CIELab values and supply it as argument for the refine tool.
Now, having decided to go for the abstract profiles and not device link...
How can I make them with Argyll or other free resources?
Read the documentation. There are probably other tools. Probably photoshop and scanin -r tools but should be in CIELab values or try to email the author
Can't I simply save a TIFF in LAB mode and use it in Argyll?
Or how do I change the color in color think?
Sorry, I haven't d this. Please let us know when you found an easy method.
About the problems of converting the image to different profiles in photoshop I don't that is too much of an issue.
In the converting panel, when selecting "abstract" everything seems to be working properly with the standard abstract profiles provided by photoshop.
Same thing when I select the abstract profiles in Capture and then I export the resulting tiff with another RGB profile like Adobe.