Bitmap-image pattern matching apparatus for correcting bitmap er

Details Bitmap-image pattern matching apparatus for correcting bitmap er Bitmap-image pattern matching apparatus for correcting bitmap er

1990-12-27

1995-04-04

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 30, G06K 940, G06K 962

Patent

active

054044111

ABSTRACT:
Improvements in bit-image quality in printing systems is achieved by providing several different pattern matching processors. Each pattern matching processor comprises a lookup table of patterns and corresponding replacement image patterns. A source image is modified by replacing areas in the source image that match patterns with the corresponding image patterns. Pattern matching processors are chosen depending on: the type of image being processed, input from the operator (user), feedback from the xerographic processor, and the color of the image. A user interface is provided which allows a user to download template and pattern data for each pattern matching processor. Pattern matching can be used to correct single-bit, half-bit, line-growth, xerographic effects and aliasing errors, and to provide control of print quality to the user.

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J. Crawford et al. (IBM Information Products Division), "Improved Print Quality by Recording Power Modulation", May 25, 1988, pp. i-8.

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