Image encoding apparatus

Details Image encoding apparatus Image encoding apparatus

1991-06-27

1992-10-06

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358445, 358447, H04N 140

Patent

active

051537494

ABSTRACT:
An image encoding apparatus includes a conversion circuit for converting binary image data to be encoded into multi-value image data, a sampling circuit for sub-sampling the multi-value image data from the conversion circuit, a binary-encoding circuit for binary-encoding the multi-value image data sub-sampled by the sampling circuit, and an encoding circuit for encoding binary image data from the binary-encoding circuit. The binary-encoding circuit binary-encodes the multi-value image data while diffusing an error generated upon binary-encoding to surrounding pixels.

REFERENCES:
patent: 4414580 (1983-11-01), Johnsen et al.
patent: 4654721 (1987-03-01), Goertzel et al.
patent: 4656525 (1987-04-01), Norris
patent: 4668995 (1987-05-01), Chen et al.
patent: 4682869 (1987-07-01), Itoh et al.
patent: 4710823 (1987-12-01), Kitazawa
patent: 4766499 (1988-08-01), Inuzuka
patent: 4782399 (1988-11-01), Sato

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