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Black level vs. gamma

post #1 of 5
7/31/07 at 2:04pm
Thread Starter 
I recently ran across a display that exhibited either a good black level and much too-high gamma or a good gamma and a much too-high black level. I couldn't get both right at the same time. I finally compromised with a 2.57 gamma and a black level that was only a little too high.

Can anyone think of a reason for why one should in such situations optimize one or the other rather than compromising?
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post #2 of 5
7/31/07 at 4:20pm
I've always found that compromise is the logical choice. Except in politics.
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post #3 of 5
8/1/07 at 10:37am
Quote:
Originally Posted by TomHuffman View Post

I recently ran across a display that exhibited either a good black level and much too-high gamma or a good gamma and a much too-high black level. I couldn't get both right at the same time. I finally compromised with a 2.57 gamma and a black level that was only a little too high.

Can anyone think of a reason for why one should in such situations optimize one or the other rather than compromising?

I think the same philosophy you used in your color tutorial regarding grey scale compromises applies here as well. A single average gamma doesn't tell the whole story, getting good gamma reproduction from near-black to mid-tone is more important than at the high end or shooting for an overall target average. It also depends more heavily on room lighting conditions, if it's very bright, a higher black pedestal will not have as detrimental an effect as the batcave.
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post #4 of 5
8/1/07 at 11:48am
Thread Starter 
Quote:


getting good gamma reproduction from near-black to mid-tone is more important than at the high end or shooting for an overall target average.

Zoyd: But that was precisely the problem. The high end was fine. Rising out of black too slowly was the only significant deviation from an ideal curve. Raising the black level seemed to fix this, but now the black level was considerably elevated according to a pluge and the CR was ruined.
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post #5 of 5
8/1/07 at 12:17pm
Quote:
Originally Posted by TomHuffman View Post

Zoyd: But that was precisely the problem. The high end was fine. Rising out of black too slowly was the only significant deviation from an ideal curve. Raising the black level seemed to fix this, but now the black level was considerably elevated according to a pluge and the CR was ruined.

ok, unless the viewing environment was extreme in one direction or the other I don't see any problem with your choice.
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