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Join Date: Dec 2006
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I agree pixel-level sharpness is not the absolute determining factor, as it is only one type of sharpness, it can however be used in the measuring process as one of about 5 main attributes to sharpness. Pixel level sharpness can have a negative affect in video, but it can also act as a sharpening filter so to speak for certain types of content (depends though as it combines with other factors in sharpness, so it can go either way). There are several things to use, my test pattern will show textual sharpness on non-anti-aliased text, video sharpness, pattern sharpness, color sharpness, and sharpness across varying colors, etc... These all have to be taken into account. Not only do you have to look at all this, you also have to then check the focus uniformity and sharpness across different parts of the screen.
For instance if I have a red convergence error, then my text may appear much sharper with WHITE text on a red background than your text appears with a GREEN error, even if the green is 1/2 the error. The red background will hide the error. Generally speaking a blue error is the least concern, a green error is second least, and a red error is the largest concern in convergence (because easiest to see), or that is how I understand it.
That is why I just average it out across multiple patterns, I like that pattern I made (even though I know it's ugly) just because I'm used to it and seen it on so many different projectors. If I had known then what I know now, I would have made the pattern much more sophisticated, I would have used more color patterns and more color on text, and some other things as well, some moving video patterns too and crammed it all on one screen to compare at the same time. Maybe one day I will.