Color sequential scanner incorporating a synchronized variable e

Details Color sequential scanner incorporating a synchronized variable e Color sequential scanner incorporating a synchronized variable e

1992-08-05

1993-10-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

358475, 358 42, H04N 146, H04N 907

Patent

active

052510212

ABSTRACT:
This abstract describes an apparatus for providing accurate white balance for images from a color sequential image scanner while minimizing the object illumination level. A shutter synchronized to the phase of a fluorescent light source allows for different exposure times for the red, green and blue image captures, in order to achieve proper white balance while maximizing the signal to noise ratio. By synchronizing the shutter with the AC voltage supplied to the illumination source, light level variations from one image capture to another are minimized.

REFERENCES:
patent: 4636081 (1987-01-01), Saitoh et al.
patent: 4713683 (1987-12-01), Fujimori et al.
patent: 4736251 (1988-04-01), Sasaoka
patent: 4737857 (1988-04-01), Rucci et al.
patent: 4831460 (1989-05-01), Yamada
patent: 4937663 (1990-06-01), Gerlach

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