Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1977-04-04
1980-03-11
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358133, 358138, H04N 100
Patent
active
041930967
ABSTRACT:
A system for compressing or compacting scanned image data is disclosed. The system electronically subdivides the image data pixel pattern into quadrants and predictively encodes pictorial data by predicting, from the established image values of adjoining quadrants, an image value for each quadrant. The predicted image value is then compared with the established image value and the magnitude of the error, if any, determined. The error, if any, is then encoded to provide a relatively highly compressed description of the image suitable for transmittal, storage, and the like.
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patent: 4150400 (1979-04-01), Wong
Coles Edward L.
Griffin Robert L.
Xerox Corporation
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