Two dimensional hybrid digital convolver

Details Two dimensional hybrid digital convolver Two dimensional hybrid digital convolver

1989-12-26

1991-03-05

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

36472405, 36472412, 382 27, 382 49, G06K 940

Patent

active

049982885

ABSTRACT:
A hybrid 2-D digital convolver in a video image processor to enhance or supress image characteristics comprises a rectangular array of delay elements of pixel duration arranged in rows and columns. A digital serial stream of data encoding pixel values of a 2-D image is coupled to successive rows of delay elements of the array in horizontal-line lengths. The pixel values are modified in a multiplier of preselected weight in series with the input of each columnar delay element in a row. An adder connected between pixel delay elements in each row combines weighted inputs and outputs from prior delay elements. The output of the last delay element of each row is combined with the row outputs of prior rows and the output of the adder following the output of the last delay element off the last row forms the processed output of the convolver. The arrangement of adders and delay elements in each row avoids cumulative adder delays and thereby improves image processing efficiency.

REFERENCES:
patent: 4231095 (1980-10-01), Cassagne
patent: 4363104 (1982-12-01), Nussmeier
patent: 4399461 (1983-08-01), Powell
patent: 4433438 (1984-02-01), Couturier
patent: 4443855 (1984-04-01), Bishop et al.

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