The device may dither them if it's not native colors. I don't think a picture is a good test for such a thing.
Anyway I've some more complicated grayscale tester in my own bag (and I prefer pictures with complicated display instead of simple "bar of gray".
I attach them with my post. The third one is for my point of view the best way to test a grayscale screen. but even trying to use "native gray value" of a Eink screen it always dither for a lot of reasons.
Last edited by Godzil; 07-13-2009 at 01:06 PM.
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