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Article #2395

Re: RGB Values of "NeXT Help Blue" -- NOT 12-bit pure !

#2395
From: Peter Eisch
Date: Thu, 28 Jan 1993 19:22
30 lines
1671 bytes
In article <2B6811EC.1252@deneva.sdd.trw.com> kieffer@spf.trw.com (Robert  
Kieffer) writes:
> In article <1k8i4n$mhl@agate.berkeley.edu> izumi@pinoko.berkeley.edu  
> (Izumi Ohzawa) writes:
> > 
> > Actually, on a closer examination,  Mail's Help Panel text color gets
> > dithered on Color Station.  There are actually two kinds of pixels
> > (RGB) = (51, 68, 136) and (RGB) = (51, 68, 153).  The former gives
> > B=0.5333 and the latter gives 0.6.  So, it's not a 12-bit pure color.
> > You've got to pick the color on a NeXTdimension to get the correct
> > information.
> > 
> 
> My NeXTDimension gives RGB = (51, 68, 152) FYI.

If this is about the little link diamond that is used in help, then read on.   
Otherwise this is of little use to you...

I looked at the image resource that the shared image is composited from and it  
is a RGBA image that holds 4bits per sample.  Thus, it will be the same whether  
it displayed on a station or dimension.  Chances are that it was dithered when  
the image was 'cast in stone' as a tiff file.



> Robert Kieffer
> kieffer@spf.trw.com

peter
peter@tahiti.umhc.umn.edu
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From: peter@tahiti.umhc.umn.edu (Peter Eisch)
Subject: Re: RGB Values of "NeXT Help Blue" -- NOT 12-bit pure !
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Date: Thu, 28 Jan 1993 19:22:39 GMT
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