Thank you for your thoughtful response Graeme. I will try this. All the best to you! Walker
On Jan 5, 2018, at 7:09 PM, Graeme Gill <graeme2@argyllcms.com> wrote:
forums@walkerblackwell.com wrote:
What I’m talking about is simple. Is there a consistent way to calibrate with an ICC such that numbers above print like this when measured with a spectro (approximately as the real values have been rounded to 2 decimals):
L* 14.45 L* 19.28 L* 24.11 L* 28.94 L* 33.77 L* 38.6 L* 43.43 L* 48.26 L* 53.09 L* 57.92 L* 62.75 L* 67.58 L* 72.41 L* 77.24 L* 82.07 L* 86.9 L* 91.73 L* 96.5
If you want to define values in L*a*b* in Photoshop, then why not simply do so ? - i.e. create an Lab raster, and enter the pixel values. When printed, these will be translated to the printer device values using the intent you have chosen. i.e. this bypasses the source profile, and uses just the destination (print) profile.
[ Also do-able using ArgyllCMS cctiff if your raster is a TIFF L*a*b* space raster - you just need the destination profile to convert to printer space, in contrast to the usual workflow in which you would also need a source profile to interpret the incoming rasters RGB space. ]
Absolute Colorimetric intent should then let you reproduce the measured L* values, within the gamut of the printer.
Graeme Gill. _______________________________________________ Do not post admin requests to the list. They will be ignored. colorsync-users mailing list (colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/forums%40walkerblack...
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