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 JP5366672
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a fixed pattern noise removing unit for removing fixed pattern noise with a high accuracy.SOLUTION: A timing controller makes an imaging element generate a regular image signal with low-luminance time as the exposure time (S101). The timing controller makes the imaging element generate an evaluation image signal with reduced time as the exposure time (S102). An image processing part detects the maximum value of the data level of pixel data constituting evaluation image data (S103). The image processing part stores low-luminance image data in an SDRAM if the maximum data level is less than a first threshold (S104 and S105). The image processing part generates FPN data by using the stored low-luminance image data. The image processing part subtracts the FPN data from regular image data (S109).
Inventors:
Hiroshi Ieri
Application Number:
JP2009143573A
Publication Date:
December 11, 2013
Filing Date:
June 16, 2009
Export Citation:
Assignee:
HOYA CORPORATION
International Classes:
A61B1/04; H04N5/361
Domestic Patent References:
| JP9083840A | ||||
| JP2007174266A | ||||
| JP2008205635A | ||||
| JP2007082097A | ||||
| JP10313428A |
Attorney, Agent or Firm:
Takashi Matsuura
Hiroki Ogura
Tsuyoshi Nonaka
Shigeru Torayama
Tsubouchi Shin
Hiroki Ogura
Tsuyoshi Nonaka
Shigeru Torayama
Tsubouchi Shin
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