Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1978-05-15
1981-09-22
Orsino, Jr., Joseph A.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358261, H04N 712
Patent
active
042913390
ABSTRACT:
A scanner scans an original document in two orthogonal directions and produces binary data signals representing the document. An extractor combines each two scan lines into one scan line by taking the logical sum of the data signals in corresponding positions in the two original scan lines. Each second data signal is removed. The data signals in even positions in one line are removed and the data signals in odd positions in the succeeding line are removed, thereby removing the data signals in a zig-zag manner. The data signals so processed are subjected to run-length encoding. In a receiver, the data signals are run-length decoded and fed into an interpolator which senses the data signals and inserts data signals into the spaces from which data signals were removed in accordance with a predetermined logical function. The interpolator controls a printer to print each scan lines twice to reproduce the original document.
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Wong-Picture Restoration Algorithm for Facsimile Machines, IBM Tech. Discl. Bull., vol. 19, #2 pp. 668-671, Jul. 1976.
Konishi Akira
Murayama Noboru
Ogawa Mutsuo
Takeuchi Norisada
Alexander David G.
Orsino Jr. Joseph A.
Ricoh & Company, Ltd.
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