Method and apparatus for compression of digitized image data usi

Details Method and apparatus for compression of digitized image data usi Method and apparatus for compression of digitized image data usi

1995-06-05

1998-06-16

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3582612, 3582613, 358426, 358430, 358432, 358433, 358448, 358453, 358530, 358538, 382232, 382233, 348398, 348420, G06F 1500, H04N 1415, H04N 146, H04N 1102

Patent

active

057684812

ABSTRACT:
The present invention is directed to systems and methods for encoding (for example, compressing) image data while at the same time, improving both the compression ratio and the perceptibility of the decoded (for example, decompressed) image using a dynamic band recompression scheme. In accordance with exemplary embodiments, portions of a compressed image are decompressed upon occurrence of a predetermined condition prior to compression of an entire frame of image data, and then recompressed with subsequent portions of the original image. Exemplary embodiments achieve enhanced fidelity in a decompressed image even when the image data is compressed without segregation into its scanned and non-scanned components.

REFERENCES:
patent: 4797739 (1989-01-01), Tanaka
patent: 4903317 (1990-02-01), Nishihara et al.
patent: 4918541 (1990-04-01), Ishida et al.
patent: 5003299 (1991-03-01), Batson et al.
patent: 5068644 (1991-11-01), Batson et al.
patent: 5144688 (1992-09-01), Bovir et al.
patent: 5189521 (1993-02-01), Ohtsubo et al.
patent: 5237397 (1993-08-01), Mighdoli et al.
patent: 5291286 (1994-03-01), Murakami et al.
patent: 5408328 (1995-04-01), Boliek et al.
patent: 5408542 (1995-04-01), Callahan
patent: 5455680 (1995-10-01), Shin
patent: 5576845 (1996-11-01), Komatsu
patent: 5588069 (1996-12-01), Katayama et al.
Data Compression Techniques and Applications, Thomas J. Lynch, Ph.D, Van Nostrand Reinhold Company, New York, 1985, Table of Contents, plus Chapter 5, Transform Coding, pp. 68-81.
Tilings and Patterns-An Introduction, Branko Grunbaum et al.
Inside Macintosh.TM., vol. I, II, and III, Addison-Wesley Publishing Company, Inc., 1985, 3 pages, including a page labelled 1-470 Toolbox Utility Routines.
Graphics File Formats, David C. Kay et al, Windcrest.RTM./McGraw-Hill, 1992, Table of Contents, plus Chapter 15, JPEG, pp. 141-148.
Graphics Gems II, "11.4 Fast Anamorphic Image Scaling", by Dale A. Schumacher, 1991, Academic Press Inc., ESEN 0-12-064480-0, Title Page and pp. 78-79.
PostScript Language Reference Manual, Second Edition, by Adobe Systems Incorporated, 1990, Title Page, and pp. 305-307.

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