Re: Preview RGB space versus RGB working space
Re: Preview RGB space versus RGB working space
- Subject: Re: Preview RGB space versus RGB working space
- From: Chris Murphy <email@hidden>
- Date: Sat, 19 May 2001 21:11:47 -0600
Henrik Holmegaard <email@hidden> writes:
>
LUTs are good, but for device spaces, not for editing spaces.
I disagree. A well designed LUT based profile describing a color space
can make an effective working space. It just takes ample consideration to
ensure it isn't screwy. One example is that there are two common sRGB
profiles floating around. One is matrix based and the other is table
based. Perhaps Michael Stokes, or someone else who knows, exactly what
the idea is behind the LUT version. I believe the LUT based sRGB profile
I've seen is from Kodak, but I'm not sure about that. What I recall is
that a matrix based sRGB profile had some issue with it (a propensity for
blues to shift purple I think) that the LUT based one doesn't exhibit as
badly.
>
Linocolor, and now also Photoshop 6, support LUT-based monitor
>
profiles.
I'm pretty sure that ProveIt! makes LUT based monitor profiles, and those
profiles could be used as a monitor profile for Photoshop 5. They could
not be used as RGB working space profiles.
In Photoshop 6, it's not merely that it supports LUT-based monitor
profiles, but that it will allow any LUT-based profile (monitor, scanner,
or output) to be used as an RGB working space.
Chris Murphy
Color Remedies (tm)
Boulder, CO
303-415-9932