Method and apparatus for removing artifacts from scanned halfton

Details Method and apparatus for removing artifacts from scanned halfton Method and apparatus for removing artifacts from scanned halfton

1995-10-11

1998-10-13

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345136, 358454, 358456, G09G 536

Patent

active

058219153

ABSTRACT:
A method for removing artifacts from a bitmap of image data produced by scanning a halftone image may comprise the steps of: (a) calculating a weighted average intensity value for a target pixel based on a weight factor for the target pixel and on weight factors for neighboring pixels in the bitmap of image data; (b) repeating step (a) for each pixel in the bitmap of image data; and (c) replacing the intensity value of each pixel in the bitmap of image data with the weighted average intensity value for each such pixel.

REFERENCES:
patent: 4833723 (1989-05-01), Loveridge et al.
patent: 5504504 (1996-04-01), Markandey et al.
patent: 5533149 (1996-07-01), Kaplan et al.

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