Abstract of U.S. Patent No. 5,541,653 (July-30-1996)
Method and Apparatus for Increasing Resolution
of Digital Color Images Using Correlated Decoding
Inventors: John D. Peters, Hewitt D. Crane, and Eugenio Martinez-Uriegas
Assignee: SRI International, Menlo Park, California.
Color image compression and decompression is achieved by either spatially and chromatically multiplexing three digitized color planes, such as RGB (Red-Green-Blue), into a digital array representative of a single digitized spatially- and chromatically-multiplexed plane through use of a data processor or through use of a multi-sensor CCD imaging device with a sensor offset, or, by use of a color imaging device, capturing an image directly into a single spatially-multiplexed image plane, for further compression, transmission and/or storage. A decoder extracts, from the stored or transmitted image, data to restore each of the color planes. Specific demultiplexing techniques involve correlating information of other planes with the color plane to be demultiplexed. Various techniques of entropy reduction, smoothing and speckle reduction may be used together with standard digital color compression techniques.
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