Data compression method having a fixed ratio of compression for

Details Data compression method having a fixed ratio of compression for Data compression method having a fixed ratio of compression for

1990-10-10

1993-06-15

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Auxiliary signal

358429, A63F 900

Patent

active

052204405

ABSTRACT:
A data compression method and device for an image processor such as a digital copying machine. The picture image information is divided into blocks and the blocks are characterized by the variation in density level found within each block. The individual blocks are then encoded. During encoding, the allocation of the chromatic gradation information and the resolution information are varied in accordance with the characteristics of the particular block. The amount of chromatic gradation information and the amount of resolution information are inversely proportional to each other. Because gradation information and the resolution information are varied, the total amount of information in each encoded block is constant. Therefore, the data compression is tailored to the individual requirements of each image block, but the total amount of information in each compressed block is constant. Because the data compression ratio is constant, storage and processing needs for the compressed information can be accurately and easily predicted before the data is compressed.

REFERENCES:
patent: 4205341 (1980-03-01), Mitsuya et al.
patent: 4222076 (1980-09-01), Knowlton
patent: 4811239 (1989-03-01), Tsao
patent: 4831659 (1989-05-01), Miyaoka et al.
patent: 4922349 (1990-05-01), Abe et al.
patent: 4979738 (1990-12-01), Frederiksen
patent: 5021891 (1991-06-01), Lee

Affiliated with

Also associated with

Rating

Data compression method having a fixed ratio of compression for does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data compression method having a fixed ratio of compression for , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data compression method having a fixed ratio of compression for will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1047295