Image reading apparatus

Details Image reading apparatus Image reading apparatus

1997-07-09

1998-12-08

Ben, Loha

Optical: systems and elements

Lens

With viewed object support

358471, 358474, 2502081, 355 55, G02B 2702, H04N 104

Patent

active

058478841

ABSTRACT:
An image reading apparatus which reads document surfaces of open book-like documents placed on a document platen in a face upward condition, the image reading apparatus comprises; a first detector which detects a height distribution of a document surface in a main scanning direction, a second detector which detects a height distribution of the document surface in a sub-scanning direction, and a direction discrimination device for discriminating whether a placement direction of the document is a main scanning direction or a sub-scanning direction based on the height distributions.

REFERENCES:
patent: 5003167 (1991-03-01), Arques
patent: 5276530 (1994-01-01), Siegel
patent: 5362958 (1994-11-01), Ando
patent: 5416609 (1995-05-01), Matsuda et al.
patent: 5585926 (1996-12-01), Fujii et al.
patent: 5616914 (1997-04-01), Matsuda

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