Cluster dot halftoning system

Details Cluster dot halftoning system Cluster dot halftoning system

1996-11-26

1998-04-14

Rogers, Scott

Image analysis

Image compression or coding

Gray level to binary coding

382270, 358456, 358457, 358460, H04N 1405

Patent

active

057402795

ABSTRACT:
A method of constructing a screen for halftoning a digitized image is described, in which a composite screen is established. A composite LUT having m times n rank ordered threshold elements is constructed for use in halftoning digitized images. A variety of optimization techniques can be employed to improve the visual appeal of the images rendered using the composite LUT for rendering a variety of image types in single or multicolored imaging applications.

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patent: 4149194 (1979-04-01), Holladay
patent: 4485397 (1984-11-01), Schueter et al.
patent: 4876611 (1989-10-01), Fischer et al.
patent: 5014123 (1991-05-01), Imoto
patent: 5181162 (1993-01-01), Smith et al.
patent: 5341228 (1994-08-01), Parker et al.
patent: 5394252 (1995-02-01), Holladay et al.
patent: 5673121 (1997-09-01), Wang
Binarization Using a Two-Dimensional Pulse-Density Modulation by R Eschbach and R. Hauck, Journal of the Optical Society of America A 4, 1873-1878 (1987).
"Pulse-Density Modulation on Rastered Media; Combining Pulse-Density Modulation and Error Diffusion", by R. Eschbach, Journal of the Optical Society of America A, 7, 708-716 (1990).

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