Digital filter for processing two-dimensional digital image

Details Digital filter for processing two-dimensional digital image Digital filter for processing two-dimensional digital image

1986-06-06

1987-07-21

Malzahn, David H.

Boots, shoes, and leggings

382 54, G06F 1531, H01J 4014

Patent

active

046823018

ABSTRACT:
Digital filters can be very effectively used for filtration of two-dimensional image. A special one of the digital filters operates to add together all data over a filter length, multiply the addition result by a predetermined set value, and to effect addition or subtraction between the multiplication result and data at a point of interest to be filtered. In case of the addition, the filter works as a low-pass filter. In case of the subtraction, the filter provides for a high-pass filtration. Such digital filter has such a problem that the number of additions is increased as the filter length is larger. Therefore, it is essential in the digital filters to reduce the necessary number of additions.

REFERENCES:
patent: 4328426 (1982-05-01), D'Ortenzio
patent: 4339803 (1982-07-01), Michael et al.
patent: 4437122 (1984-03-01), Walsh et al.
patent: 4463381 (1984-07-01), Powell et al.
patent: 4507681 (1985-03-01), Verhoeven et al.
patent: 4602285 (1986-07-01), Beaulier et al.

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