Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1980-10-29
1982-12-21
Britton, Howard
Facsimile and static presentation processing
Facsimile
Recording apparatus
358133, 364515, H04N 712
Patent
active
043652735
ABSTRACT:
A method for compressing picture data, wherein an original picture is scanned photoelectrically to obtain analog picture signals which are converted in an analog-digital converter into picture data to be transmitted or stored in a memory, wherein each of a matrix of picture data having addresses is compared with an adjacent picture data in horizontal, vertical, right upper diagonal and left upper diagonal directions to obtain comparison results, and wherein either each picture data or its adjacent picture data is skipped according to the comparison results when the two picture data have the same value, to obtain compressed data consisting of representative data which cannot be skipped.
REFERENCES:
patent: 4150401 (1979-04-01), Yamamoto
patent: 4155097 (1979-05-01), Lux
patent: 4189748 (1980-02-01), Reis
patent: 4231095 (1980-10-01), Cassagne
Nakade Toshiaki
Yamada Mitsuhiko
Britton Howard
Dainippon Screen Seizo Kabushiki Kaisha
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