Re: Camera profiling with ICC et al
Re: Camera profiling with ICC et al
- Subject: Re: Camera profiling with ICC et al
- From: email@hidden
- Date: Mon, 15 Sep 2008 17:35:55 EDT
In a message dated 9/15/08 2:18:21 PM, email@hidden writes:
> how could
> it possibly become a "good" profile by another testing methodology?
>
As I explained in previous posts, one of many reasons is because cameras dont
meet the Luther condition, camera and human observer metamerism results. So
the profile designer has to decide what basis functions to optimize for. Chart
basis and scene basis are different enough such that a profile optimzed for
one set of basis will not likely be optimal for scene basis and vice versa. And
since we don't know what the profile designer choose (hopefully scene with or
without chart guidance), we cant conclude that a profile is good or bad
based on its performance against a chart. Stated mathematically, the camera
profiling problem is underdetermined. Its very different from a printer profile
evaluation which is not. We are going around in circles at this point, so I think
its time to move on. Good luck with the rest of your testing.
Eric Walowit
Tahoe
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