i1Studio with ccStudio vs ArgyllCMS

[erfus]

I'll have to read a bit more documentation on that, unfortunately I'm a bit restricted on time at the moment.

Just a few thoughts:

It now looks to me that providing a profile to colprof creates B2A tables for perceptual and saturation which map the whole gamut of the supplied profile into the gamut of the printer.

I think you are on the right track here, although that should be confirmable with documentation.
Almost every guide out there uses some profile with the -S flag, including torger's famous guide. But I don't really understand why you want to map the gamut of a supplied profile to the gamut of the printer. What we want is to map the gamut of the actual picture to the gamut of the printer, and not it's theoretical maximum gamut, right?

That also explains why with every bigger color space (sRGB -> AdobeRGB -> ProPhoto RGB) the image get's flatter.

For the OP I suggest you forget about specifying a profile to colprof and as long as you are using 16 bits use profoto or AdobeRGB profiles for you printed images.

I did a quick test without specifying a profile (= removing the -S flag), which gives me yet another output with perceptual rendering. Colors look strong (similar to sRGB), but with a yellowish tint. Have to look a bit deeper into that.

Maybe I should give it try to use the sRGB color space as the target space when generating my profiles and see what happens in the perceptual intent when printing

Difference between sRGB and AdobeRGB can definitly be seen, most difference is between sRGB and ProPhoto RGB which maps with the theory above.

//edit: Unfortunatly it seems all my posts require moderator approval, which kind of messes with the chronology of this thread, sorry about that.

 

[Epatcola]

What we want is to map the gamut of the actual picture to the gamut of the printer, and not it's theoretical maximum gamut, right?

What we want is to print the colors as they are in the image. The problem is colors in the image outside the printer's gamut and what you do with those colors depends on the rending intent.

You could choose to clip them with relative or absolute colorimetric intent or try to maintain saturation at the expense of color accuracy with saturation intent or compress the image gamut so it fits inside the printer gamut with perceptual intent which may mean none of the printed colors are accurate.

A profile which maps a color space to the printer gamut for perceptual and saturation intents could be useful because all images fitting in that color space would print consistent if inaccurate colors. If you want print a bunch of photos of a woman in a red dress you really don't want the color of the dress to change depending on what out of gamut colors there are in the background. As I said in the last post I don't know what happens when the image contains colors outside the color space used to generate the profile.