Image analysis – Histogram processing – For setting a threshold
Patent
1988-10-07
1990-11-06
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
382 56, 382 29, 382 25, 358426, G06K 948
Patent
active
049692011
ABSTRACT:
A method of recognizing an arcuate or circular arc segment is used with an image processing apparatus. In a first step, two arbitray image structuring points are selected as segmenting end points from the dot-line image data. next, an image structuring point among the image structuring points present within a segment divided by the segment end points that is located furthest from and in a direction perpendicular to a straight line connecting the given structuring points and within a distance which is equal to or larger than a constant distance is extracted. The, three consecutive, adjacent polygonal-line structuring points are recognized as an arcuate or circular arc segment when a distance between a virtual circle passing through the three adjacent points and a median point of two line segments formed by the three consecutive points is equal to or less than the constant distance.
REFERENCES:
patent: 4566124 (1986-01-01), Yamamoto et al.
patent: 4748675 (1988-05-01), Suzuki et al.
patent: 4783829 (1988-11-01), Miyakawa et al.
Proceedings of the 27th Conference of the Japanese Society of Data Processing, pp. 965-966, 1983.
Shimizu Nobuyuki
Takasaki Naruto
Tanaka Yutaka
Hitachi Software Engineering Co. Ltd.
Moore David K.
Razavi Michael
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