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

1989-07-31

1990-11-27

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358107, 382 8, H04N 700

Patent

active

049740776

ABSTRACT:
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.

REFERENCES:
patent: 4441125 (1984-04-01), Parkison

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