Re: Gamma confusion!
Re: Gamma confusion!
- Subject: Re: Gamma confusion!
- From: email@hidden
- Date: Sun, 11 Mar 2001 10:09:40 EST
In a message dated 3/11/01 12:36:21 AM, email@hidden writes:
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Could anybody clarify gamma confusion I recently found?
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As I understand the purpose of calibration process is to linearize certain
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device. So to calibrate monitor I should find out what gamma my uncalibrated
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monitor and VLUT in video card have. The overall gamma = Mon Gamma / VLUT
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Gamma.
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To linearize my monitor I should apply reverse gamma equal to overall gamma.
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The
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question is why then all calibration programs ask me for gamma I want
calibrate
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to ? What does it mean? If all the above is right they should define
uncalibrated
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gammas by itself. So could you please explain this gamma issue to me?
You are making all this much too complicated. On the Mac the assumed monitor
gamma is 1.8, and on the PC 2.2. Smart applications like Photoshop are going
to compensate for the gamma you set anyhow, so the real question is how you
want the brightness on the color-clueless applications to look. Using a
monitor gamma of 2.2 on the Mac is a bit snappy at the Finder level, but in
many non-managed apps actually displays something more representative of what
the print will look like. So try building profiles at both 1.8 and 2.2 and
seeing which you prefer to live with.
C. David Tobie
Design Cooperative
email@hidden