Method of matching patterns and apparatus therefor

Details Method of matching patterns and apparatus therefor Method of matching patterns and apparatus therefor

1990-12-31

1993-10-12

Couso, Jose L.

Image analysis

Histogram processing

For setting a threshold

382 8, 382 48, 358101, 358106, 358107, G06K 948

Patent

active

052533069

ABSTRACT:
A method for matching patterns includes the steps of optically scanning a master image and a to-be-recognized image and outputting master image data and to-be-recognized image data, extracting master outline data representing an outline of the master image from the master image data, extracting to-be-recognized outline data representing an outline of a to-be-recognized image from the to-be-recognized image data, performing an enlargement process for the to-be-recognized outline data to enlarge the to-be-recognized outline, thereby forming to-be-recognized outline data, and collating the master outline data with the to-be-recognized outline data, and if a portion of the master outline projects from the to-be-recognized outline, determining that the to-be-recognized image has a short-defect indicating an omission of the image

REFERENCES:
patent: 4589140 (1986-05-01), Bishop et al.
patent: 4648053 (1987-03-01), Fridge
patent: 4692943 (1987-09-01), Pietzsch et al.
patent: 4701961 (1987-10-01), Hongo
patent: 4893346 (1990-01-01), Bishop
patent: 4953224 (1990-08-01), Ichinose et al.

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