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I'm trying to get my monitors (two different models) to look the same. I've been fiddling with the gamma/brightness/color channels in the NVIDIA Control Panel, but I can't make them look exactly the same.

When I use comparison images, it's always just slightly off. Is there some free tool out there that can do this process for me? I don't know if the contrast, brightness, or whatever is off. My perception is apparently pretty bad.

I'm using Windows 7.

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If you really want the monitors to look "exactly the same", then there is no free "tool". You need to use a colorimeter instead of your eyeballs. –  sawdust Jun 14 '11 at 8:45

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