Re: Colorsync-users Digest, Vol 5, Issue 82
Re: Colorsync-users Digest, Vol 5, Issue 82
- Subject: Re: Colorsync-users Digest, Vol 5, Issue 82
- From: "info" <email@hidden>
- Date: Sat, 8 Mar 2008 10:20:23 -0500
Nov06 wrote:
A camera does the same as a raw converter. It converts the raw data
into RGB data existing in an internal colour space.
Don't most raw converters use generic input profiles as a starting point ,
unless ( like Capture One or Bibble) they allow for complete manual control
of the conversion inorder to produce an untagged Tiff file for profiling?
Eric Walowit wrote:
1) The rendering "look" imparted in the conversion from sensor signals to
the
color space (color image encoding). The matrix settings, in part,
determine
the rendering.
Somehow this "output referred rendering" seems to know source colorimetric
values and is able to place them (or prepare them for placement) into
specific target values. The only way that I am aware of, for a camera
manufacturer to know what specific colorimetric values any camera produces
would be to measure them with a spectrophotometer. Otherwise , it seems to
me that the link from signal control to srgb colours would be as arbitrary
as assigning a colour space.
Is it possible that this "output referred rendering" is actually either
several alternative input profiles or a single input profile with different
"rendering " instructions for the CMM.
Paul Lowry
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