File:2008-04-20 gamma correction screenshot - detail.png

The gamma correction test pattern from Kubuntu 7.10. I tried to adjust it for neutral before taking the screenshot, and it may or may not make a difference if it was correct, but if it does make a difference and I didn't get it quite right, this image may not be good for calibration use.

Here's another test pattern, but I don't think it's as good.