Image reading apparatus and image recording apparatus

Details Image reading apparatus and image recording apparatus Image reading apparatus and image recording apparatus

1996-05-22

1999-11-16

Lee, Thomas D.

Image analysis

Image sensing

Optical

382312, 358505, 358455, G06K 920, H04N 146, H04N 140

Patent

active

059871946

ABSTRACT:
An image reading apparatus includes a line sensor for reading an image of a document sheet, an A/D converter for converting image data from the line sensor to multi-level image data, a binarization comparator for converting the multi-level image data from the A/D converter to bi-level image data and an image processing IC for selectively outputting the multi-level image data from the A/D converter and the bi-level image data from the binarization comparator. The number of read pixels in the multi-level image data output mode is set to be smaller than the number of read pixels in the bi-level image data output mode.

REFERENCES:
patent: 4525748 (1985-06-01), Carbone
patent: 5101282 (1992-03-01), Honma
patent: 5604826 (1997-02-01), Kajita

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