Method for improving the signal-to-noise ratio of a CCD sensor i

Details Method for improving the signal-to-noise ratio of a CCD sensor i Method for improving the signal-to-noise ratio of a CCD sensor i

1996-10-15

1999-04-27

Vu, Kim Yen

Facsimile and static presentation processing

Facsimile

Picture signal generator

358474, 348272, 25020801, H01L 2700, H04N 104, H04N 314

Patent

active

058985093

ABSTRACT:
A method for color imaging using a photosensor array having multiple rows of charge-coupled-device cells. The exposure times for each color channel are adjusted to provide improved signal-to-noise. The overall cycle time is determined by the channel having the weakest signal. A sufficient number of shift pulses are added to ensure that the weakest signal can still result in a full scale output. Once the total number of shift pulses per cycle is determined, the exposure times for the remaining channels are determined as a fraction of the weakest signal's required exposure (if possible). Each row has a separate transfer gate control input. The timing of the transfer gate pulses is then determined, preferably centering the exposure times to reduce color misregistration.

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Patent Abstracts of Japan; Pub. No. JP63076570; Pub.Date Jun. 4, 1988; vol. 12, No. 310; Yamamoto Yukio; Intl Cl. 1/04.

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