System for recognition of shape patterns

Details System for recognition of shape patterns System for recognition of shape patterns

1976-06-09

1977-04-19

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

250202, G06K 900

Patent

active

040191737

ABSTRACT:
A system for the recognition of shape patterns is disclosed which comprises reading the projection on a reference line of a shape pattern by means of a pattern input device, converting the output of the pattern input device into projection values, transferring the projection values to two stages of differential circuits, continuing the whole procedure described above while the postural angle of the shape pattern is changed until the shape pattern completes one rotation, detecting the fact that each side of the polygon of the shape pattern has fallen exactly into the direction of projection in accordance with the change in the initial value of the output from said differential circuits, causing the rotated postural angle of the shape pattern and the projection value existing at the time of said detection to be memorized and accomplishing the recognition of the shape pattern on the basis of the memorized data.

REFERENCES:
patent: 3366735 (1968-01-01), Hecker
patent: 3576980 (1971-05-01), Doyle
patent: 3599149 (1971-08-01), Pardoe

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