Image analysis – Histogram processing – For setting a threshold
Patent
1996-05-08
1998-07-07
Downs, Robert W.
Image analysis
Histogram processing
For setting a threshold
382176, 382261, G06K 962, G06K 936, G06F 944
Patent
active
057781567
ABSTRACT:
A system and method electronically image process a pixel belonging to a set of digital image data with respect to a membership of the pixel in a plurality of image classes. This process uses classification to determine a membership value for the pixel for each image classes and generates an effect tag for the pixel based on the fuzzy classification determination. The pixel is image processed based on the membership vector of the pixel. The image processing may include screening and filtering. The screening process screens the pixel by generating a screen value according to a position of the pixel in the set of digital image data; generating a screen amplitude weighting value based on the values in the membership vector for the pixel; multiplying the screen value and the screen amplitude weighting value to produce a modified screen value; and adding the modified screen value to the pixel of image data. The filtering process filters the pixel by lowpass filtering the pixel; highpass filtering the pixel; non-filtering the pixel; multiplying each filtered pixel by a gain factor based on the values in the membership vector associated with the pixel; and adding the products to produce a filtered pixel of image data.
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Beikirch Thomas R.
Schweid Stuart A.
Williams Leon C.
Downs Robert W.
Nickerson Michael J.
Xerox Corporation
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