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process and apparatus for filtering spatial frequencies change, an image of a picture projected on a transparent image of a projection objective, and application of this process
process and apparatus for filtering spatial frequencies change, an image of a picture projected on a transparent image of a projection objective, and application of this process
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机译:滤波空间频率变化的方法和装置,投影在投影物镜的透明图像上的图像图像以及该方法的应用
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摘要
An optical system in which a plurality of light sources is used in conjunction with a spatial filter to modify at least some of the details of a projected image so as to increase or decrease the image contrast with respect to such details.
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