Profile verification in PatchTool
Profile verification in PatchTool
- Subject: Profile verification in PatchTool
- From: Marco Ugolini <email@hidden>
- Date: Sun, 4 May 2008 12:07:11 -0700 (GMT-07:00)
Danny Pascale wrote:
>Marco,
>
>When making a check from an opened file, the reference data is always XYZ
>(or L*a*b*) based, and the source profile is thus L*a*b*/PCS.
>
>A source profile needs/can only to be assigned for the "Quick" test, which
>use RGB in the source profile as reference.
Hi Danny.
This is what I find on page 49 of the PatchTool manual (in PDF format):
"To check for your profile accuracy, select your display profile as both the source and destination. In theory, the difference between the references and the measured data should be zero for a perfect profile and if nothing has changed since calibration."
When the RGB data are opened in PatchTool, the user is asked to assign one of 5 possible working spaces. The choice is limited to AdobeRGB, Apple RGB, Generic RGB, ProPhoto RGB, and sRGB, and does *not* include the monitor profile or any of the other RGB profiles in the user's ColorSync profile folder.
At any rate, choosing the monitor profile as source for the opened RGB data in Display Check is the same as assigning it, say, in Photoshop, correct?
By the way, while I'm very clear on the the reason for selecting a source profile, why are we required to choose a *destination* profile in DisplayCheck, given that the measured data are already device-independent and ready to be used as is without further conversions?
Thank you, and all the best.
Marco
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