Color image reading apparatus

Details Color image reading apparatus Color image reading apparatus

1991-07-26

1993-11-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

358500, H04N 146

Patent

active

052626318

ABSTRACT:
A color scanner having two lines of CCD. One of the CCD line is used for scanning green image of a document, and another CCD line is used for scanning red and blue images of the document. In the CCD line for red and blue image scanning, red and blue filters are located alternatively on the pixel sensors in a lined shape. In order to obtain a pixel density corresponding to the red image and blue image as same as that to the green image, each of red and blue image signals is processed from two image signals. The color scanner is provided with a memory to store red and blue image signals so that those signals are processed with next-obtained red and blue image signals. The color scanner also includes a shift register to delay green image signals so that all of red, blue, and green image signals are carried out to a processor simultaneously.

REFERENCES:
patent: 4954703 (1990-09-01), Ohzu

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