Method and apparatus for performing image compression using disc

Details Method and apparatus for performing image compression using disc Method and apparatus for performing image compression using disc

1990-09-21

1993-02-23

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Auxiliary signal

358426, 358133, 358138, H04N 1415, H04N 712

Patent

active

051895269

ABSTRACT:
A method and apparatus for performing data compression is disclosed that does not require interpolation of pixel data in order to define image blocks. More specifically, the present invention provides spatially interleaved image blocks composed of high frequency image components by sampling the high frequency image components at a pitch or spatial sample frequency equal to that of the low frequency image components. The present invention provides the added advantage of reducing the number of image blocks that must be defined in order to perform data compression.

REFERENCES:
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patent: 4417269 (1983-11-01), Dischert
patent: 4446484 (1984-05-01), Powell
patent: 4549212 (1985-10-01), Bayer
patent: 4553165 (1985-11-01), Bayer
patent: 4608600 (1986-08-01), Sugiyama
patent: 4677479 (1987-06-01), Hatori et al.
patent: 4692806 (1987-09-01), Anderson et al.
patent: 4876590 (1989-10-01), Parulski
patent: 5051840 (1991-09-01), Watanabe et al.
"Optical Scanning of Continuous-Tone and Line Documents with Spatial Frequency Separation for Improved Data Handling and Compaction" by H. R. Schindler, S. S. Soo and J. M. White, IBM Technical Disclosure Bulletin, vol. 20, No. 12, May 1978, pp. 5416-5421.

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