How do one generate profiling patches (The hen or the egg)
How do one generate profiling patches (The hen or the egg)
- Subject: How do one generate profiling patches (The hen or the egg)
- From: Thomas Holm / Pixl <email@hidden>
- Date: Tue, 22 Apr 2003 17:29:38 +0200
I'm a firm advocate of ICC profiles but there is still one thing I can't get
into my head. If anyone would volunteer an explanation, I'd be grateful.
When one builds patches for profiling a printer, how do one obtain the
reference (LAB or XYZ) values used when comparing the actual spectral
readings of printed targets?
Or in other words, where does the reference value for something like the
IT8, or ECI 2002 target originate from? What's the correlation between
something like 100, 100, 0 100 in the printable CMYK target and the
corresponding reference value...
In my mind you have to have a profile to be able to convert between LAB and
any device space. But in this case you don't have a profile as you need the
reference value to build the profile. So there must be another way eh?
Best Regards
Thomas Holm / Pixl ApS
- Photographer & Colour Management Expert (or so I thought ;-)
- Adobe Certified Training Provider in Photoshop.
- Imacon Authorized Scanner Training Facility
- Remote Profiling Service (Output ICC profiles)
- Seminars speaker and tutor on CM and Digital Imaging etc.
- Home Page: www.pixl.dk 7 E-mail: email@hidden
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