Image reading apparatus and a method for detecting open/close of

Details Image reading apparatus and a method for detecting open/close of Image reading apparatus and a method for detecting open/close of

1996-07-16

1999-12-14

Lee, Thomas D.

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

358400, 358474, 358498, G06K 938, H04N 104

Patent

active

06002805&

ABSTRACT:
An image reading apparatus suitable for use as a facsimile apparatus, a coping apparatus or the like, and a method for detecting open/close of an original feeding unit in the image reading apparatus. The image reading apparatus has an original feeding unit openable and closable for feeding an original set, a light radiating unit for radiating lights on the original fed, an image sensor disposed on a feeding route for detecting an image of the original on the basis of reflected light from the original, a binary information converting unit for converting detecting image information from the image sensor into binary information, and a data processing unit using the binary information from the binary information converting unit as read image information on the occasion of image reading, while using it as information used to detect an open/close state of the original feeding unit on the occasion excepting the image reading, thereby detecting an open/close state of the original feeding unit without causing an increase of the number of parts of the apparatus.

REFERENCES:
patent: 4132977 (1979-01-01), Nagano
patent: 5568281 (1996-10-01), Kochis

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