Method and apparatus for encoding and transmitting picture infor

Details Method and apparatus for encoding and transmitting picture infor Method and apparatus for encoding and transmitting picture infor

1985-04-29

1987-05-19

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358261, H04N 140

Patent

active

046672516

ABSTRACT:
A half tone picture information is encoded and transmitted by apparatus comprising dither processing means for dither processing an analog picture image signal into a picture information block including M picture element points.times.N scanning points by means of a dither matrix including M.times.N threshold values, correlating processing means for correlating respective picture elements between dither processed picture information blocks by the dither matrix for outputting signal change information of respective picture elements between respective picture information blocks, an encoding means for encoding the signal change information outputted from the signal processing means.

REFERENCES:
patent: 3185823 (1965-05-01), Ellersick, Jr. et al.
patent: 3185824 (1965-05-01), Blaslag et al.
patent: 3213268 (1965-10-01), Ellersick, Jr.
patent: 3502806 (1970-03-01), Townsend
patent: 3808362 (1974-04-01), Tsuda et al.
patent: 3967052 (1976-06-01), Judice
patent: 4475127 (1984-10-01), Sinuma
patent: 4533957 (1985-08-01), Sinuma

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