Image compressing apparatus

Details Image compressing apparatus Image compressing apparatus

1994-12-05

1996-07-16

Boudreau, Leo

Image analysis

Image compression or coding

Adaptive coding

382245, 382246, 358427, 3582612, G06K 936

Patent

active

055376169

ABSTRACT:
In an image compressing apparatus of this invention, a table of extended MH codes is prepared with respect to combinations of consecutive black/white pixels. When a portion where frequent changes between black and white occur is to be coded, consecutive black/white pixels are coded at once without measuring the run lengths of pixels. These extended MH codes are obtained by combining MH codes corresponding to black and white runs whose run lengths are determined in one byte of an original image.

REFERENCES:
patent: 4610027 (1986-09-01), Anderson et al.
patent: 4646356 (1987-02-01), Anderson et al.
patent: 4750043 (1988-06-01), Hisada et al.
patent: 4797945 (1989-01-01), Suzuki et al.
patent: 4939583 (1990-07-01), Tsuboi et al.
patent: 5305111 (1994-04-01), Chao et al.

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