True color? Modifying Color at Bit map ...

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2 total messages Started by UTKD03 Sun, 08 Nov 1992 17:37

#1385

Author: UTKD03
Date: Sun, 08 Nov 1992 17:37

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I really have a problem. When I was an unsatisfied User of an IBM Clone
I had a couple buttons at my screen, where I could adjust the red/blue/green
level. It was essential for true color scans. Now I have this nice little
box equipped with a dimension board (32 MB) , a couple different colour
modells, but without the possibility to adjust the colour after it left
the dimension board. I cannot recalculate the tiff image, becouse it will
be correct when printed. If I dont find any help, i probably have to switch
to a silicon graphic or such a thing. It is also no problem with a Mac.
Please give me a short e-mail note, If you have a suggestion.
         THANKS Markus Schroeder  (UTKD03@RHRZ.UNI-BONN.DE)

Re: True color? Modifying Color at Bit map ...

#1403

Author: Scott Byer
Date: Mon, 09 Nov 1992 22:50

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UTKD03@rhrz.uni-bonn.de writes

> I really have a problem.  When I was an unsatisfied User of an IBM
> Clone I had a couple buttons at my screen, where I could adjust
> the red/blue/green level.  It was essential for true color scans.
> Now I have this nice little box equipped with a dimension board
> (32 MB) , a couple different colour modells, but without the
> possibility to adjust the colour after it left the dimension board.
> I cannot recalculate the tiff image, becouse it will be correct
> when printed.  If I dont find any help, i probably have to switch
> to a silicon graphic or such a thing.  It is also no problem with
> a Mac.  Please give me a short e-mail note, If you have a suggestion.

Do you mean physical knobs, or software adjustments?

Most color monitors I have dealt with do not have exposed color
adjustment knobs, but all color monitors do have adjustment knobs
somewhere, usually hidden inside the case.  I don't recommend
messing around with them yourself, but...

If you mean software adjustment, then that is a problem with the
application displaying the tiff.  Doing color adjustments using
Display PostScript is fairly trivial, given the ease with which
transfer functions can be installed.

NeXTSTEP 3.0 also has a way of adjusting the default CIE-based
color space translations to RGB according to the ReadBook, 2nd ed.
Check out /NextLibrary/PS2Resources/ColorRendering/NXCalibratedRGB,
and the CIE chapters in the ne RedBook.

--
Scott Byer                             NeXTMail: byer@mv.us.adobe.com
Adobe Systems Incorporated               These are *my* opinions, and  
1585 Charleston Road, P.O. Box 7900        do not necessarily reflect
Mountain View, CA 94039-7900             the opinions of my employer.
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