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Originally posted by ChaCha What I mean is the ability to just tell your projector "OKay, I have a 80 inch wide by 60 inch high screen - Now make whatever I feed you come out in that size exactly. And do the least image distortion that you can do" Am I dreaming or just showing my total naivete to the way a projector works? |
Originally posted by jeff125va ... If the projector projected only the image and not the bars, wouldn't you see white bars (the color of the screen/wall)? ... |
The bars are not projected, but are in fact the lack of anything to project |
Originally posted by joebwan Ummm, no. If you think about it, how do you think black (say a black dinner jacket) is constructed? It is the absence of light. So what Sailn said is quite correct: The fact that a white screen looks black is a cool illusion. |
Originally posted by jeff125va ... in your example, a black dinner jacket is black because of black pigmentation in the material, normally a dye in clothing. My white clothes don't have any more light than my red or blue or black clothes. They just have less pigmentation. True white, by definition, would have no pigmentation. Something has to cause the black bars to be black. If you turn the projector off, those portions of the screen appear white again. ... Maybe we're just on a different page here ... |