Image analysis – Image compression or coding – Gray level to binary coding
Patent
1997-10-03
1999-06-29
Lee, Thomas D.
Image analysis
Image compression or coding
Gray level to binary coding
382205, 358456, 358457, G06K 936, G06K 946, H04N 140
Patent
active
059179511
ABSTRACT:
A technique combines most of the advantages of both blue noise and clustering in generating a clustered aperiodic mask and using it in a dither array algorithm for halftoning. The method of halftoning of grey scale images utilizes a pixel-by-pixel comparison of the image against a clustered aperiodic mask in which the clustered aperiodic mask is comprised of a partly random and partly deterministic single valued function which is designed to produce visually pleasing dot configurations when thresholded at any level of grey.
REFERENCES:
patent: 5111310 (1992-05-01), Parker et al.
patent: 5602943 (1997-02-01), Velho et al.
Thompson Gerhard Robert
Tresser Charles P.
Wu Chai Wah
International Business Machines - Corporation
Kaufman Stephen C.
Lee Thomas D.
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