Title:
CCDセンサのS/N比改善方法
Document Type and Number:
Japanese Patent JP4044655
Kind Code:
B2
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.
Inventors:
Mark Jay Bianth
Oscar Earl Hera Y
Oscar Earl Hera Y
Application Number:
JP27675397A
Publication Date:
February 06, 2008
Filing Date:
October 09, 1997
Export Citation:
Assignee:
HEWLETT-PACKARD COMPANY
International Classes:
H04N1/19; H04N5/353; H04N5/369; H04N9/04; H04N5/372
Domestic Patent References:
| JP63138866A | ||||
| JP9018888A | ||||
| JP6078107A | ||||
| JP9205520A |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Arihara Koichi
Matsushima Tetsuo