Spatial filter

Details Spatial filter Spatial filter

1985-03-29

1988-04-05

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

364724, G06K 940

Patent

active

047364483

ABSTRACT:
A spatial filter has a plurality of uniformly weighting spatial filters for defining as pixel data of a given pixel a value corresponding to a sum of pixel data in a predetermined square area near the given pixel. The characteristics of these uniformly weighting spatial filters are linearly coupled to obtain substantially circular filter characteristics.

REFERENCES:
patent: 3563634 (1971-02-01), Parks et al.
patent: 3849760 (1974-11-01), Endou et al.
patent: 3993976 (1976-11-01), Ginsburg
patent: 4328426 (1982-05-01), D'Ortenzio
patent: 4489390 (1984-12-01), Parenti et al.

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