Apparatus for detecting edge position of elongated article

Details Apparatus for detecting edge position of elongated article Apparatus for detecting edge position of elongated article

G - Physics

01

B

350/32, 340/124.

G01B 11/02 (2006.01) G01N 21/84 (2006.01)

Patent

CA 1322043

63-194,568 APPARATUS FOR DETECTING EDGE POSITION OF ELONGATED ARTICLE Abstract of the Disclosure An apparatus for detecting an edge position of an elongated article in which an image of the edge portion of the object is picked up by a two-dimensional television camera arranged above the article such that the scanning line of the television camera is made substantially parallel with the edge portion of the article, an image signal of the image of the edge portion is converted into a bivalent signal representing black and white pixels, the number of the black pixels in every scanning line is counted to obtain an histogram, a scanning line number at which the number of the black pixels is abruptly increased in the histogram is detected as the edge position of the article.

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