Ian Young wrote: >Most of the test images I've seen include a photograph of a Macbeth chart. >Curiously, they all seem to be slightly different colours... I was >wondering whether anyone knew what the actual colours of the Macbeth chart >patches were supposed to be? Answers in XYZ, xyY, your favourite working >space or Lab all gratefully accepted. A pointer to something on-line with >definitive information would probably be preferred to some RGB values off >your scanner :-) > >I don't own a copy of the Macbeth chart. I do own a set of the Kodak Q-13 >"Color Control Patches". The same question applies to those, really. > >I've tried Gretag-Macbeth's web site (I assume that's the Macbeth in >question?) and Kodak's web site, with no success. Ian, I sent you an artificially generated version of the Macbeth chart made with Lab values so you can read them in Photoshop, this is an averaged set of values of course, the actual charts are all somewhat different but close enough for some pretty discriminating work. For the Kodak IT8 Q60 targets the data reference files are specific to each individual batch of charts and many are available on Kodak's web site. They are averaged values for each batch of charts as printed and measured. They are available for download at ftp://FTP.Kodak.com/GASTDS/Q60DATA/ -- read the index and info file before you download. Dan Culbertson - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.