[NTG-context] Which color model shall I use

Hans Hagen j.hagen at xs4all.nl
Sun Sep 30 19:37:37 CEST 2018


On 9/30/2018 7:22 PM, Alan Braslau wrote:
> On Sun, 30 Sep 2018 19:07:24 +0200
> Hans Hagen <j.hagen at xs4all.nl> wrote:
> 
>>> Luckily I never had to match corporate colors of different models in ConTeXt...
>> the worst are colors specs with 4 decimals based on some design made in
>> indesign where one has at most 256 values per channel and then some
>> designer looking at his display claiming to see a difference in the 3rd
>> decimal betweenm his sample and the one generated by tex
> 
> I have 16bit grayscale images where the full dynamic range contains very useful information. Of course, no display really shows this and I doubt that any printer would faithfully reproduce it, yet the eye can discern the difference using the proper media. This is now called high dynamic range imaging in photography... but has been used in X-ray imaging for quite some time now.

given that the average male can only see 16 shades of gray ...

> For reasons of quality or transparency, rather free dissemination of information, it would be useful to be able to distribute a PDF including these images with their whole 16bit dynamic range. Of course, any or most all PDF readers would only display 8bits, but one could in principal extract the underlying image for examination and analysis.
c m y k in 16 bit would mean 4 * 8 bytes per pixel

(ok, one day we migh twant to store raw images made by these multi-ccd 
(in high end) phone camera and do all these sharp and zoom corrections 
outside that device .. interesting techniques btw)

Hans


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