33^4 should be enough! I have a slightly unusual situation - I have a proprietry monitor calibration scheme that I'm trying to emulate with ICC. The scheme I have gives me the primaries of the monitor, the white point and very precise brightness values for every step of r, g and b separately (3 * 256). My first thought was to pretend to have an IT8 chart with 768 patches on it which seems like it would work from your comments below.
>Hi, >Well, first you have to take in account that profiles does not contain >sample points but a model for the colorspace translation. >One particular implementation of this model, could be a 3D grid containing >samples at fixed slices. If these are what you are referring, there is >AFAIK no limit in ICC spec, but a cube side of 33 - 48 points is the >practical limit. Note that, in RGB, a side of 33 points does represent >33 * 33 * 33 * 3 = 107811 samples!! On CMYK, the numbers >grow to enormous: 33 * 33* 33* 33 * 4 = 4743684!!!!! >On 6-inks profiles, anything higher that 6 points is a little monster. > >Photoshop does work fine with this type of profiles, in fact, all >profiles pre-revision 4 can be only of two different flavors: LUT-based >(this ones) and matrix-shaper. Rev 4 will introduce a lot more variants. > >If you are referring to IT8 files, well, I've checked up to 1000 samples, >I assume this would be enough for most applications ;-) > >Regards, >Marti. ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user
