gamma on Mac vs. Windows PC
gamma on Mac vs. Windows PC
- Subject: gamma on Mac vs. Windows PC
- From: "Neil Okamoto" <email@hidden>
- Date: Wed, 18 Jul 2001 01:00:20 -0700
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neil snape wrote:
>
> Do modern video cards use a different native gamma setting based on the
>
> platform they have been designed for?
>
Before any intervention there isn't a VLUT to adjust the gamma. When you
>
calibrate you push the levels that indeed modify the gamma. Most monitor
>
profilers now include a VCGT which I think means VideoCardGammaTag that
>
installs (loads) the VLUT in the video card after Colorsync version 2.5.
I just worked through the Mac vs. PC gamma question at work, with assistance from Tom and Nick at Sequel Imaging. On our G4 Macs running OS 9 with "millions of colors" (eg. 24 bit or truecolor), the gamma is roughly 2.2. It is *not* 1.8 as most people would believe.
We did this test because we're writing Linux monitor calibration software to match our Macs and our Linux PCs. The gamma is the same on either platform, so our software works the same on either platform.
-Neil
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