Facsimile and static presentation processing – Natural color facsimile – Specific image-processing circuitry
Patent
1995-04-11
1998-01-13
Coles, Sr., Edward L.
Facsimile and static presentation processing
Natural color facsimile
Specific image-processing circuitry
358456, 382270, H04N 140
Patent
active
057085188
ABSTRACT:
A method of and system for rendering a halftone image of a gray scale image by utilizing a pixel-by-pixel comparison of the gray scale image against a blue noise mask is disclosed in which the gray scale image is scanned on a pixel-by-pixel basis and compared on a pixel-by-pixel basis to an array of corresponding data points contained in a blue noise mask stored in a PROM or computer memory in order to produce the desired halftoned image. Both digital and optically implemented halftone methods are disclosed. Application specific modifications of the blue noise mask as well as its use for producing halftoned color images are also disclosed.
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Mitsa Theophano
Parker Kevin J.
Coles Sr. Edward L.
Lee Fan
Research Corporation Technologies Inc.
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