Method of processing pattern data on the basis of ranked amplitu

Details Method of processing pattern data on the basis of ranked amplitu Method of processing pattern data on the basis of ranked amplitu

1991-06-12

1994-06-07

Couso, Yon J.

Image analysis

Histogram processing

For setting a threshold

382 30, 382 31, 382 41, 382 33, G06K 964, G06K 962, G06K 920

Patent

active

053197232

ABSTRACT:
Method and apparatus for determining the presence of a predetermined pattern in a spatial field. The invention involves selecting a collection of amplitude values on the basis of location within a multivalued-amplitude field and arranging sequences of amplitude values in order of their magnitude. Amplitude values occurring at predetermined ranks are chosen as characteristic quantities representative of the portion of the field under consideration. By inter-relating a plurality of these characteristic quantities, pattern recognition is accomplished. Preferably rank value filters are employed for producing the characteristic quantities.

REFERENCES:
patent: 4597009 (1986-06-01), Ballmer et al.
patent: 4736439 (1988-04-01), May
patent: 4933978 (1990-06-01), Perlman et al.
patent: 4949389 (1990-01-01), Allebach et al.
patent: 5054095 (1991-10-01), Bernsen et al.

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