Low-distortion and high-speed color image scanner

Details Low-distortion and high-speed color image scanner Low-distortion and high-speed color image scanner

1996-10-08

1998-04-21

Vu, Kim

Image analysis

Image enhancement or restoration

Artifact removal or suppression

358514, 358516, 358463, 348572, H04N 156

Patent

active

057427119

ABSTRACT:
The present invention is an image scanner adapted to be used for scanning a color image which includes an image sensor which converts the scanned color image into three analog voltage signals, a clock generator which provides a clock for the image sensor outputting the three analog voltage signals in response to the clock, three amplifying switches electrically connected to the image sensor through three respective independent signal paths and respectively having three disablers thereon for respectively enabling/disabling the amplifying switches by utilizing an impedance thereof in order to respectively amplify the three analog voltage signals and transmit one of the amplified voltage signals therethrough at a time, an analog-to-digital converter electrically connected to the three amplifying switches which respectively converts the three analog voltage signals into digital signals and a data-processing device electrically connected to the analog-to-digital converter which receives and stores the digital signals. The present invention has an advantage of avoiding the signal distortion and has a fast scanning and processing speed.

REFERENCES:
patent: 4675727 (1987-06-01), Sekizawa et al.
patent: 4707615 (1987-11-01), Hosaka
patent: 4809061 (1989-02-01), Suzuki
patent: 4954888 (1990-09-01), Fogaroli et al.
patent: 5105286 (1992-04-01), Sakurai
patent: 5305122 (1994-04-01), Hayashi et al.
patent: 5319450 (1994-06-01), Tamayama et al.

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