Block parallel error diffusion method and apparatus

Details Block parallel error diffusion method and apparatus Block parallel error diffusion method and apparatus

1994-01-04

1996-05-21

Mancuso, Joseph

Image analysis

Image compression or coding

Quantization

358465, 382234, 382304, G06K 936

Patent

active

055197914

ABSTRACT:
In order to display a continuous tone colour image on a discrete colour level display, methods of halftoning must be used. The high display rate of colour output devices means that serial methods of real time halftoning are difficult to use. A method and apparatus is disclosed for reducing the speed with which a halftoning method must be performed by performing the halftoning of an output image by simultaneously dividing the input image into a number of areas and simultaneously halftoning the areas individually making special provisions for pixels located in the boarder regions of a given area.

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P. Heckbert, "Color Image Quantization for Frame Buffer Display", Computer Graphics, vol. 16, No. 3, pp. 297-307 (Jul. 1982).
R. Ulichney, "Digital Half Toning", MIT Press, pp. 341, 342 (1987).
G. W. Braudaway, "Procedure for Optimum Choice of a Small Number of Colors From a Large Color Palette for Color Imaging", IBM Technical Disclosure Bullentin, vol. 29, No. 3, pp. 1329-1334 (Aug. 1986).

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