Digital filter for image processing

Details Digital filter for image processing Digital filter for image processing

1996-03-25

1997-09-16

Couso, Jose L.

Image analysis

Image enhancement or restoration

Image filter

382205, 382254, 364724011, 36472416, G06K 940

Patent

active

056688954

ABSTRACT:
A digital filter for image processing which permits a reduction in the size of the circuit includes a plurality of bit shifters for multiplying each picture element data of a k.times.k matrix, each by a coefficient which corresponds to the respective picture element. A first adder circuit adds the output data of all of the bit shifters. A first multiplier circuit multiplies picture element data of a center picture element of the k.times.k matrix by a predetermined coefficient. A second multiplier circuit multiplies output data of the first adder circuit by a predetermined coefficient and a second adder circuit adds output data of the first multiplier circuit and that of the second multiplier circuit.

REFERENCES:
patent: 3818203 (1974-06-01), Perlowski et al.
patent: 4724544 (1988-02-01), Matsumoto
patent: 4760542 (1988-07-01), Mehrgardt et al.
patent: 4847909 (1989-07-01), Shibata
patent: 4887232 (1989-12-01), Wolrich et al.
patent: 5027423 (1991-06-01), Kawata et al.

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