Method and apparatus for effecting spot/void filtering of image

Details Method and apparatus for effecting spot/void filtering of image Method and apparatus for effecting spot/void filtering of image

1989-10-10

1991-07-02

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 52, 382 54, G06K 940

Patent

active

050292269

ABSTRACT:
Apparatus for filtering digital image data which is initially presented in the form of an array of multi-bit pixels having plural scale values. Threshold means are provided for converting the scale value pixels to an array of binary pixels in which each pixel is associated with either background or image formation data. Patterns of neighboring pixels are examined and used to transform a center pixel in the window as a function of the detected pattern in a manner to remove isolated spots or voids from the image data.

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