Apparatus and method for hybrid compression of raster data

Details Apparatus and method for hybrid compression of raster data Apparatus and method for hybrid compression of raster data

1996-12-24

1999-11-09

Lee, Thomas D

Image analysis

Image compression or coding

Adaptive coding

382166, G06T 900

Patent

active

059829370

ABSTRACT:
From a raster page, patches of connected pixels of the same color are identified. Patches of at least a predetermined sized, typically corresponding to text or line art objects, are subjected to a lossless compression. Patches below the predetermined size, typically corresponding to image or photo objects, are substantially subjected to a lossy compression. The patch predetermined size controls the mix of lossless and lossy compression procedures. Optimum compression is achieved by maximizing the lossless compression while attaining a targeted compression ratio. Various features include efficient recognition and encoding of patches, refined treatment of the boundaries between the lossless- and the lossy-compressed pixels, adaptive compression ratio control, and fail-safe compression provisions.

REFERENCES:
patent: 5151949 (1992-09-01), Miyata
patent: 5479587 (1995-12-01), Campbell et al.
patent: 5796864 (1998-08-01), Callahan
Search Report mailed on Apr. 15, 1998.

Affiliated with

Also associated with

Rating

Apparatus and method for hybrid compression of raster data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for hybrid compression of raster data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for hybrid compression of raster data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1467030