Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1997-05-01
2000-10-10
Cuchlinski, Jr., William A.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345138, 345149, 358534, 358535, 358536, G09G 510
Patent
active
061306614
ABSTRACT:
A method and apparatus are disclosed which permit a seamless halftoning of an image by halftoning regions of the image independently and/or in parallel. Each region of the image being arbitrarily determined, and being halftoned on the basis of halftoned pixel results of pixels within a predetermined neighborhood of the region. The arrangement providing a greater flexibility in the independent halftoning of the regions, while providing substantially seamless joins between abutting halftoned regions of the image. Further, the arrangement also provides a mechanism for parallel processing (halftoning) of abutting regions of an image with substantially seamless results.
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Knuth, "Digital Halftones by Dot Diffusion," acm Transactions of Graphics, 1987, pp. 245-273.
Canon Information Systems Research Australia Pty Ltd
Cuchlinski Jr. William A.
Marc-Coleman Marthe Y.
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