Encoding apparatus for color image data

Details Encoding apparatus for color image data Encoding apparatus for color image data

1992-09-17

1994-10-25

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

Specific image-processing circuitry

358520, 348396, H04N 4415

Patent

active

053594380

ABSTRACT:
There is disclosed an apparatus for encoding, faithful to human visual characteristic, of color image data containing luminance information and color information in the unit of each block of predertermined size, by detecting the edge of the color image data in the block based on the luminance information, forming a code of a fixed length in response to the edge detection, encoding the luminance information and the color information into codes of different lengths according to the presence or absence of edge, and forming codes from the code of fixed length and codes of different lengths.

REFERENCES:
patent: 4682215 (1987-07-01), Adachi
patent: 4887151 (1989-12-01), Wataya
patent: 4974071 (1990-11-01), Maeda
patent: 4982270 (1991-01-01), Tanaka et al.
patent: 4982277 (1991-01-01), Katoh et al.
patent: 5089884 (1992-02-01), Suzuki et al.
patent: 5204738 (1993-04-01), Aragaki

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