How to increase accuracy of the profile when faced with out-of-gamut colors?
Is it possible to profile a printer using a scanner?
Adding White Point to Camera matrix profile
Imaginary Primaries
CMP Digital Target 3
CMP Digital Target 3 chart recognition file
.cht Format
Tips by Graeme Gill [link]
Quote:{ it8.cht was created by scanning and running scanin -g, then hand editing, while ColorCheckerDC.cht was created completely by hand. You need to be careful of the syntax, since the code is quite simple, and therefore not very forgiving. The usual thing is to try the .cht file out on a real scan while generating the recognition diagnostics, to see how well/not well it is working.
Another approach that may work for some charts, is to create a print test chart that imitates the chart you want to recognize (ie. same layout, relative size & spacing of patches, similar test colors), and then to use printtarg -r -S to generate a .cht file that is setup for that chart. This is only going to be worthwhile if one of the printtarg instrument output formats can be made to match the chart though.}
Hutchcolor target
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