Title:
電子カメラのシェーディング補正回路
Document Type and Number:
Japanese Patent JP4329409
Kind Code:
B2
Abstract:
A shading correction circuit of the present invention includes an image pickup device having photo detectors arranged on its receptive surface, and a shading correction part for performing shading correction on an output signal of the image pickup device. The image pickup device has an effective pixel area and an upper optical black part. The shading correction part has a correction coefficient generating part and a correction processing part. The correction coefficient generating part thereof extracts shading variation according to an output of the upper optical black part, and generates a correction coefficient for the shading variation. The correction processing part thereof performs shading correction on an image signal by using the correction coefficient generated by the correction coefficient generating part.
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Inventors:
Akihiko Morishita
Application Number:
JP2003146041A
Publication Date:
September 09, 2009
Filing Date:
May 23, 2003
Export Citation:
Assignee:
NIKON CORPORATION
International Classes:
H04N1/401; H04N5/335; H04N5/361; H04N5/369; H04N5/378; H04N9/64
Domestic Patent References:
| JP10341379A | ||||
| JP6078224A | ||||
| JP6054261A | ||||
| JP9326962A | ||||
| JP2002016841A |
Attorney, Agent or Firm:
Furuya Fumio