Re: Colorimetric Accuracy in the Field
Re: Colorimetric Accuracy in the Field
- Subject: Re: Colorimetric Accuracy in the Field
- From: Ben Goren <email@hidden>
- Date: Wed, 05 Jun 2013 14:25:53 -0700
On Jun 5, 2013, at 1:58 PM, Robin Myers <email@hidden> wrote:
> The issue was what Bruce Fraser did in his test, which was to perform a relative colorimetric shift on the RGB coordinates for the ColorChecker neutral patches.
See, that's where you're losing me.
ProPhoto is D50. The N9.5 patch typically had a D50 Lab value of about 95, 0, 2, corresponding to ProPhoto RGB values of about 238, 238, 233.
What's the different color space that this is being relatively colorimetrically rendered into with ProPhoto RGB values of 241, 241, 241 / Lab 96, 0, 0?
We are agreed, are we not, that the ColorChecker N{whatever} patches are emphatically not actually neutral, are we not?
b&
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