Pattern detecting method and apparatus
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United States of America Patent
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-
Sep 4, 1990
Issued Date -
N/A
app pub date -
Jul 18, 1989
filing date -
Dec 10, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pattern detecting method for accurately detecting the position of a center of an image of a pattern is disclosed. The method includes the steps of forming an image of a pattern on an image pickup device, dividing the image of the pattern into plural portions and detecting the center of the image of the pattern in each portion, and determining the position of the center of the image of the pattern, on the basis of the data obtained by the detection made with regard to each portion.
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