Reducing storage requirements for display data

Details Reducing storage requirements for display data Reducing storage requirements for display data

2007-04-30

2009-12-08

Lee, Thomas D (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S426010, C382S232000, C382S239000

Reexamination Certificate

active

07630099

ABSTRACT:
A method and apparatus for generating a compressed representation of a two-dimensional image where the image is described as a sequence of pixels in raster order. The method includes receiving the two-dimensional image as a sequence of pixels in raster order. For each pixel, the system determines whether the pixel is part of a first string of pixels that is identical to a second string of pixels found previously in the image at one of a plurality of preselected fixed distances from the first string of pixels. If so, the first string of pixels is encoded as a string token that is a reference to the second string of pixels. Otherwise, the pixel is encoded as a non-string token.

REFERENCES:
patent: 4876607 (1989-10-01), Tseng
patent: 5710719 (1998-01-01), Houle
patent: 6741368 (2004-05-01), Hoel
Nelson et al., “Sliding Window Compression”, The Data Compression Book chapter 8, M&T Publishing, Inc., 1992, 215-253.
Data compression reference center, “dictionary methods, algorithms”, 22 pgs., downloaded from www.rasip.fer.hr/research/compress.

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