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Digital BW, The Print

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Message

Re: PS6/PS7 "posterization" or blotchiness with VM curves

2002-07-11 by jimhayes361

--- In DigitalBlackandWhiteThePrint@y..., "Paul Roark" 
<paul.roark@v...> wrote:

> If you have blotchy highlights with vm curves, let me know which 
curves are
> the problems, and I'll just apply the same remedy to them that 
worked for
> me, and we'll see if that makes a difference.
> 
> Paul
> http://www.PaulRoark.com

But how about the way PS7 treats the greyscale conversion from gamma 
2.2 to sRGB vs PS6...I mentioned before that it converts differently. 
Using Adobe98 lessens the deviance somewhat, but most of your VM 
curves are based on sRGB conversion. I had posterization in a very 
dark print due to the PS7 change. If you do a histogram of a dark 
print file converted to sRGB in both PS7 and PS6 you will see the 
slight differences in mean, SD, and median.
Jim H.

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