Image compression method

Details Image compression method Image compression method

1997-06-02

2000-05-23

Couso, Jose L.

Image analysis

Image compression or coding

G06K 936

Patent

active

06067380&

ABSTRACT:
An image with multiple gradations is divided into a plurality of pixel blocks each of which comprises a plurality of pixels. Pixel data of the pixel block are compressed to two representing values indicative of pixel levels and a binary block pattern by block approximation coding. Representing patterns of which the number is less than that of the block patterns are set previously. A plurality of block patterns having a specific relationship with one of the representing patterns are replaced with the one of the representing patterns, so that the block patterns are compressed.

REFERENCES:
patent: 5259042 (1993-11-01), Matsuki et al.
patent: 5442458 (1995-08-01), Rabbani et al.
patent: 5621543 (1997-04-01), Oomoto
patent: 5754676 (1998-05-01), Komiya et al.

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