Title:
固定パターンノイズ除去ユニット、撮像ユニット、および電子内視鏡システム
Document Type and Number:
Japanese Patent JP5124416
Kind Code:
B2
Abstract:
A fixed-pattern noise reduction system comprising a receiver, a determination circuit, an image sensor driver, a subtracter and an output circuit is provided. The receiver receives optical pixel signals and artificial black pixel signals. The determination circuit determines whether the signal intensity of the optical pixel signal is less than a threshold. The image sensor driver orders the image sensor to carry out a second capture at least one time after the signal intensity of the optical pixel signal is less than the threshold. The subtracter subtracts noise signals from the optical pixel signals. The noise signals are generated on the basis of the artificial black pixel signal. The output circuit outputs the optical pixel signals that the subtracter subtracts the noise signals from after carrying out the second capture after carrying out the second capture.
Inventors:
Hiroshi Ieri
Application Number:
JP2008265442A
Publication Date:
January 23, 2013
Filing Date:
October 14, 2008
Export Citation:
Assignee:
HOYA CORPORATION
International Classes:
H04N5/353; H04N5/335; H04N5/365; H04N5/369; H04N5/378
Domestic Patent References:
| JP9083840A | ||||
| JP2008205635A | ||||
| JP2006222919A |
Attorney, Agent or Firm:
Takashi Matsuura
Hiroki Ogura
Tsuyoshi Nonaka
Shigeru Torayama
Tsubouchi Shin
Hiroki Ogura
Tsuyoshi Nonaka
Shigeru Torayama
Tsubouchi Shin