Michael Nagel wrote: Hi, > (1) Is there a way to see a visual report of a correction matrix (similar to > a profile > verification report) ? ccxxmake reports the max and average fit error. Would it really be useful to separate out this aspect as a verification function ? > (2) Can this program write into the hardware LUT's of an Eizo CG275W ? No, there is no current capability to write to specific display hardware. I'd be pleased to add this, but no-one has seen fit to provide me with the displays to RE and test, and I don't currently have the budget to buy dozens of high end displays myself, and give the resulting code away. > (3) How can I change the adaptation method (Bradford, Cat02 etc.) ? Which adaptation do you mean ? What benefits do you see in changing this ? The ICC white point adaptation is hard coded as Bradford in icc/icc.c, icmChromAdaptMatrix(). cLUT profiles B2A gamut mapping tables will use CIECAM02 white point adaptation whenever a gamut mapping algorithm using CIECAM02 is selected. > In all my verification reports I see that the adaptation method was always > Bradford. Yes. It seems to be the accepted best simple (ie. 3x3 matrix) white point adaptation algorithm. > (4) Can somebody advise on the ADVANCED GAMUT MAPPING OPTIONS ? What would be > standard default > values to map to a gamut ? I'm not sure what you mean. When creating profiles with gamut mapping, there is a choice of pre-defined gamut mappings - see <http://www.argyllcms.com/doc/collink.html#i> for instance. If you want to alter the gamut mapping details beyond this, then you would need to alter the source code, ie. see the gammapweights tables in gamut/gammap.c. Beyond that, you'd need to code your own algorithms. Graeme Gill.