Method of recognizing a circular arc segment for an image processing apparatus
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United States of America Patent
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-
Nov 6, 1990
Grant Date -
N/A
app pub date -
Oct 7, 1988
filing date -
Oct 8, 1987
priority date (Note) -
Expired
status (Latency Note)
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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.
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