Image scanning apparatus

Details Image scanning apparatus Image scanning apparatus

1993-12-17

1994-10-11

Rogers, Scott A.

Facsimile and static presentation processing

Natural color facsimile

Scanning

358516, 359889, H04N 104, H04N 146, H04N 907, H04N 973, G02B 523, G02B 308

Patent

active

053552342

ABSTRACT:
An image scanning apparatus which can reduce a shading distortion generated by luminous characteristics of a light source, vignetting of a lens, etc. adopts color filters having a geometrical structure which enables to counterbalance a shading distortion and is characterized in that a line sensor is vertically arranged for the radial direction of the rotary filter. The image scanning apparatus can accomplish a simple shading calibration by arranging color filters and the line sensor so that a shading distortion is calibrated geometrically.

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patent: 4809062 (1989-02-01), Chen
patent: 4841358 (1989-06-01), Kammoto et al.
patent: 4851899 (1989-07-01), Yoshida et al.
patent: 4945405 (1990-07-01), Hirota
patent: 5153717 (1992-10-01), Nitta

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