Method and apparatus for data reduction in a video image data reduction system
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United States of America Patent
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Oct 27, 1992
Grant Date -
N/A
app pub date -
Dec 26, 1991
filing date -
Dec 26, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Reducing the amount of data required to describe a greyscale image is achieved by determining the modal greyscale and giving all pixels within a tolerance level of, for example, .+-.2 greyscale levels of the modal greyscale, a logic value of 0. This leads to significant data reduction since proportionally very many pixels are effected. The contrast extremes of the image are unaffected however so that the image remains reasonably comprehensible.
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