Compression and expansion methods and apparatus

Details Compression and expansion methods and apparatus Compression and expansion methods and apparatus

1997-04-18

2000-05-09

Couso, Yon J.

Image analysis

Image compression or coding

Substantial processing of image in compressed form

382244, G06K 936

Patent

active

060614730

ABSTRACT:
A compression and encoding system for bi-level image data determines the available memory capacity of a receiving device, then compresses and encodes the image data with successively increasing compression ratios until encoded data not exceeding the memory capacity of the receiving device are obtained. Preferably, the image is divided into rectangular blocks, and successive bit planes are generated on the basis of the number of dark picture elements in each block, and on the basis of adjacency relationships among like-valued picture elements in each block. Feedback may be employed to adjust the darkness of certain compressed blocks according to the darkness of the preceding block.

REFERENCES:
patent: 4853778 (1989-08-01), Tanaka
patent: 5040233 (1991-08-01), Davy et al.
patent: 5107345 (1992-04-01), Lee
patent: 5177797 (1993-01-01), Takenaka et al.
patent: 5513279 (1996-04-01), Yoshinari et al.
patent: 5553160 (1996-09-01), Dawson
patent: 5555323 (1996-09-01), Hongu
patent: 5696842 (1997-12-01), Shirasawa et al.
patent: 5699169 (1997-12-01), Nakatani et al.
patent: 5715329 (1998-02-01), Murata
patent: 5832126 (1998-11-01), Tanaka

Affiliated with

Also associated with

Rating

Compression and expansion methods and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compression and expansion methods and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compression and expansion methods and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1072935