Pattern reading system

Details Pattern reading system Pattern reading system

1983-08-10

1986-01-21

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 22, 382 60, G06K 978

Patent

active

045661243

ABSTRACT:
A pattern reading system by line segment approximation comprising the steps of tracing the contour and simultaneously, seeking out as candidate extreme points the points at which the inner products of coordinate point vectors and directional vectors at coordinate points of the contour being traced are largest, and feeding out these candidate extreme points as real extreme points when the differences between the inner products of the direction vectors and the inner products of the candidate extreme points are greater than an allowance set in advance.

REFERENCES:
patent: 3609685 (1971-09-01), Deutsch
patent: 3987412 (1976-10-01), Morrin, II
patent: 4228421 (1980-10-01), Asada
patent: 4428077 (1984-01-01), Shimada et al.
Yamamoto et al., "Recognition of Handprinted Characters by an Outermost Point Method," Pattern Recognition, vol. 12, No. 4, 1980, pp. 229-236.
Larson et al., Calculus with Analytic Geometry, 1979, pp. 581-584.

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