RE: Re Gamma, dithering and device calibration
RE: Re Gamma, dithering and device calibration
- Subject: RE: Re Gamma, dithering and device calibration
- From: "michael shaffer" <email@hidden>
- Date: Sun, 4 Aug 2002 21:46:46 -0230
bruce fraser writes ...
>
A great many operations in Photoshop simply work on the numbers --
>
Levels, Curves, USM, and resampling, for example, will all produce
>
identical numerical results irrespective of the gamut or gamma of the
>
working space. The meaning and the appearance of those numerical
>
values is tied to the working space, but the actual numerical
>
operations are not.
As I am beginning to accept ... but not understand. That is, I would
expect PS to resample (or blur, or whatever) the visual (or tonal, or
colorimetric) elements of an image ... not simply the numbers. That being
said ... I will from now on be careful. And, its not for fear or that I
have visually noticed the side-effects ... but it is a wakening to realize
PS, after 3 color space savvy versions, does not respect the contextual
gamma (i.e., I can understand the absolute colorimetric space being a
computational headache).
cheerios ... shAf :o)
Avalon Peninsula, Newfoundland
www.micro-investigations.com (in progress)
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