Facsimile and static presentation processing – Natural color facsimile – Specific image-processing circuitry
Patent
1995-03-03
1996-06-11
Brinich, Stephen
Facsimile and static presentation processing
Natural color facsimile
Specific image-processing circuitry
358536, H04N 123, H04N 146
Patent
active
055261400
ABSTRACT:
A system and method for representing a multi-color, halftone image on a multi-color, continuous-tone device can be configured to employ an approximation technique for determining areas of overlap regions produced by adjacent device spots in a printed halftone image based on a halftone device model. The approximation technique enables consideration of the effects of a variety of halftone device characteristics such as addressability, device spot size, and color values on the appearance of a printed halftone image. The system and method can be configured to employ the approximation technique in a manner that also enables consideration of the effect of misregistration between color separations on the appearance of a printed halftone image. As an alternative, the system and method can be configured to employ a geometrical abstract that effectively centers device spots on the corners of addressable units. This "corner-centered" addressing enables a computationally faster calculation of overlaps when used with either the approximation technique or an analytical technique based on geometric relationships, particularly for device spot diameters between a factor of .sqroot.2 and 2 of the addressability of the halftone device. Finally, the system and method may incorporate a technique for scaling the addressability of color values representative of the halftone printed image without introducing significant artifacts.
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patent: 5296947 (1994-03-01), Bowers
Brinich Stephen
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Shumaker Steven J.
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