Apparatus and method for processing digital images
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United States of America Patent
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Apr 25, 1989
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N/A
app pub date -
Apr 1, 1986
filing date -
Apr 1, 1986
priority date (Note) -
Expired
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Abstract
A computer graphics apparatus and a method for allowing the comparison of two or more digitally-stored images on a raster-scan display device, such as a cathode ray tube (CRT), by use of arithmetic or Boolean logic operations performed on the picture elements (pixels) in each image which are to be superimposed at a given display pixel on the CRT. The invention provides the features of color lookup tables, continuous zoom and roam logic and high-speed processing in a computer graphics apparatus for digital image comparison.
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