Apparatus and method for detecting scanning boundary

Details Apparatus and method for detecting scanning boundary Apparatus and method for detecting scanning boundary

1997-12-08

2000-05-09

Lee, Cheukfan

Facsimile and static presentation processing

Facsimile

Facsimile measuring, testing, or calibrating

358488, H04N 100

Patent

active

060611472

ABSTRACT:
An apparatus and method are provided for detecting a scanning boundary of a scanner. The apparatus includes a reference unit, an image-pickup unit, and an operating process unit. The detecting method includes steps of: a) providing an initial optical signal; b) receiving the initial optical signal and generating a reference signal in response to the initial optical signal; c) setting a first reference pixel in the scanner; d) receiving the reference signal and generating a second reference pixel; e) calculating a difference between the first reference pixel and the second reference pixel; and f) detecting the scanning boundary after adjusting the scanner according to the difference.

REFERENCES:
patent: 4933778 (1990-06-01), Tufano et al.
patent: 5144455 (1992-09-01), Stein et al.
patent: 5198907 (1993-03-01), Walker et al.

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