Pattern analysis apparatus and method

Details Pattern analysis apparatus and method Pattern analysis apparatus and method

1974-04-24

1976-01-13

Thesz, Jr., Joseph M.

Communications: electrical

Digital comparator systems

3401463R, 235 92PC, G06K 912

Patent

active

039328392

ABSTRACT:
Method and apparatus for providing data values characteristic of objects having many different levels of light remissivity, or shades of grey, includes scanning an object to derive density and density gradient signals, accumulating signals falling within each of a plurality of gradient ranges either separately or in terms of predetermined combinations of gradient ranges, accumulating signals within a given density range which are substantially simultaneously accompanied by, or with a predetermined delay accompanied by signals falling within each of a plurality of gradient ranges either separately for each gradient range or in terms of combinations of gradient ranges, and accumulating signals within a given density gradient range which are substantially accompanied by, or with a predetermined delay accompanied by, signals falling within each of a plurality of density ranges either separately for each density range or in terms of predetermined combinations of density ranges.

REFERENCES:
patent: 3790883 (1974-02-01), Bergegere
patent: 3863056 (1975-01-01), Klein

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