Method and apparatus for filtering digital data by concatenating

Details Method and apparatus for filtering digital data by concatenating Method and apparatus for filtering digital data by concatenating

1989-03-16

1992-03-31

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 27, G06K 940

Patent

active

051014459

ABSTRACT:
An image, of the type that is comprised of an array of pixels, is filtered by the steps of: (a) reading a respective group of pixels from the array for each individual pixel that is in the array, with each pixel group overlapping other pixel groups and consisting of pixels that are contiguous with the individual pixel; (b) quantizing each of the respective groups of pixels; (c) retrieving from a memory, a single pixel for each quantized group of pixels, with the single pixel being the result of a pre-performed transformation on the quantized group of pixels; and (d) concatenating the retrieved pixels to form the filter image.

REFERENCES:
patent: 4288779 (1981-09-01), Otsu et al.
patent: 4703513 (1987-10-01), Gennery
patent: 4720871 (1988-01-01), Chambers

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