JPS6439171A - Image pickup device - Google Patents
Image pickup deviceInfo
- Publication number
- JPS6439171A JPS6439171A JP62194406A JP19440687A JPS6439171A JP S6439171 A JPS6439171 A JP S6439171A JP 62194406 A JP62194406 A JP 62194406A JP 19440687 A JP19440687 A JP 19440687A JP S6439171 A JPS6439171 A JP S6439171A
- Authority
- JP
- Japan
- Prior art keywords
- fixed pattern
- sensor
- pattern noise
- output signal
- amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Picture Signal Circuits (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
PURPOSE:To increase an image pickup light quantity area by correcting a signal corresponding to fixed pattern noise in response to the lightness of a subject and therefore eliminating effectively the fixed pattern noise component regardless of the lightness of the subject. CONSTITUTION:A shutter 3 is closed and the photoelectric transducing surface of an image sensor 2 becomes dark with switches S1 and S2 switched to the side opposite to that shown in a diagram. In this case, the output signal received from the sensor 2 is stored in a frame memory 4 via a differential amplifier 5. Then the signal corresponding to the fixed pattern noise read out of the memory 4 is inputted to a variable gain amplifier 10 and corrected in accordance with the output signal of the sensor 2. The output signal of the amplifier 10 is applied to the amplifier 5 simultaneously with the output signal of the sensor 2 that photographed an actual subject. The difference signal of both output signals is outputted. Then the video signals corresponding to only an optical image free from the fixed pattern noise is outputted via a process circuit 7.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194406A JPS6439171A (en) | 1987-08-05 | 1987-08-05 | Image pickup device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194406A JPS6439171A (en) | 1987-08-05 | 1987-08-05 | Image pickup device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6439171A true JPS6439171A (en) | 1989-02-09 |
Family
ID=16324073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62194406A Pending JPS6439171A (en) | 1987-08-05 | 1987-08-05 | Image pickup device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6439171A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0715632A (en) * | 1993-06-22 | 1995-01-17 | Nec Corp | Fixed pattern noise eliminating circuit for solid state image pickup camera |
US9325911B2 (en) | 2013-08-08 | 2016-04-26 | Canon Kabushiki Kaisha | Image capturing apparatus and method of controlling the same |
-
1987
- 1987-08-05 JP JP62194406A patent/JPS6439171A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0715632A (en) * | 1993-06-22 | 1995-01-17 | Nec Corp | Fixed pattern noise eliminating circuit for solid state image pickup camera |
US9325911B2 (en) | 2013-08-08 | 2016-04-26 | Canon Kabushiki Kaisha | Image capturing apparatus and method of controlling the same |
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