Image reading apparatus with correction of image signals

Details Image reading apparatus with correction of image signals Image reading apparatus with correction of image signals

1995-03-13

1997-04-01

Allen, Stephone

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

358474, 358471, 358486, 25055906, 25055908, H04N 140

Patent

active

056169140

ABSTRACT:
An image reading apparatus for reading a document such as book, constructed to detect a height of the document. A line sensor captures an image of the document and a lateral side view of the document reflected on a mirror. Then the height of the document detected by the line sensor is corrected based on a deviation between a positions of the document image projected on the line sensor and the lateral side view of the document projected on the line sensor.

REFERENCES:
patent: 4980720 (1990-12-01), Siegel
patent: 5084611 (1992-01-01), Okisu et al.
patent: 5184733 (1993-02-01), Arnarson et al.
patent: 5221974 (1993-06-01), Kusumoto et al.
patent: 5362958 (1994-11-01), Ando
patent: 5416609 (1995-05-01), Matsuda et al.

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