JPS55110486A - Color temperature correction circuit for color television camera - Google Patents
Color temperature correction circuit for color television cameraInfo
- Publication number
- JPS55110486A JPS55110486A JP1739679A JP1739679A JPS55110486A JP S55110486 A JPS55110486 A JP S55110486A JP 1739679 A JP1739679 A JP 1739679A JP 1739679 A JP1739679 A JP 1739679A JP S55110486 A JPS55110486 A JP S55110486A
- Authority
- JP
- Japan
- Prior art keywords
- color temperature
- color
- detectors
- detector
- detected
- 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
- 239000003086 colorant Substances 0.000 abstract 1
- 238000005286 illumination Methods 0.000 abstract 1
Landscapes
- Color Television Image Signal Generators (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE: To perform the correction of color temperature with a simple constitution, by detecting the color temperature of light source normally and automatically adjusting the color temperature to make unnecessary the temperature set every color temperature of illumination of objective changed.
CONSTITUTION: The different colors from the light source are detected at the color detectors 31 and 32, and color temperature is detected at the color temperature detector 33 with the ratio of the color signals different from the detectors 31 and 32. The output of the detector 33 is fed to the color temperature correctors 34, 35 and the voltage determining the gain of the red and blue signals is produced from the color temperature correctors 34 and 35 through the use of the output of the detector 33. Further, the gain of the external variable gain amplifiers 12, 13 amplifying the red and blue signals R, B detected at the detectors 10, 11 is adjusted automatically, and color difference signals R-YL, B-YL are made with the subtractors 14, 15 and they are fed to the encoder 16 and the standard TV signal is formed by adding the luminace signal YH.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1739679A JPS55110486A (en) | 1979-02-16 | 1979-02-16 | Color temperature correction circuit for color television camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1739679A JPS55110486A (en) | 1979-02-16 | 1979-02-16 | Color temperature correction circuit for color television camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55110486A true JPS55110486A (en) | 1980-08-25 |
Family
ID=11942828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1739679A Pending JPS55110486A (en) | 1979-02-16 | 1979-02-16 | Color temperature correction circuit for color television camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55110486A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60254894A (en) * | 1984-05-31 | 1985-12-16 | Matsushita Electric Ind Co Ltd | Color camera |
JPS6158393A (en) * | 1984-08-30 | 1986-03-25 | Nec Corp | Color image pick up device |
US4682210A (en) * | 1985-04-05 | 1987-07-21 | Victor Company Of Japan, Ltd. | Automatic white balance adjusting circuit for image pickup device |
US4700219A (en) * | 1984-04-09 | 1987-10-13 | Nec Corporation | Color imaging apparatus |
US4774564A (en) * | 1986-09-09 | 1988-09-27 | Fuji Photo Film Co., Ltd. | Electronic still camera for compensating color temperature dependency of color video signals |
US4879591A (en) * | 1986-01-31 | 1989-11-07 | Canon Kabushiki Kaisha | Image pickup apparatus compensating an image signal for variations in color temperature |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5055221A (en) * | 1973-09-12 | 1975-05-15 | ||
JPS5178925A (en) * | 1974-12-30 | 1976-07-09 | Teac Corp | Karaasatsuzosochi |
-
1979
- 1979-02-16 JP JP1739679A patent/JPS55110486A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5055221A (en) * | 1973-09-12 | 1975-05-15 | ||
JPS5178925A (en) * | 1974-12-30 | 1976-07-09 | Teac Corp | Karaasatsuzosochi |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4700219A (en) * | 1984-04-09 | 1987-10-13 | Nec Corporation | Color imaging apparatus |
JPS60254894A (en) * | 1984-05-31 | 1985-12-16 | Matsushita Electric Ind Co Ltd | Color camera |
JPS6158393A (en) * | 1984-08-30 | 1986-03-25 | Nec Corp | Color image pick up device |
US4682210A (en) * | 1985-04-05 | 1987-07-21 | Victor Company Of Japan, Ltd. | Automatic white balance adjusting circuit for image pickup device |
US4879591A (en) * | 1986-01-31 | 1989-11-07 | Canon Kabushiki Kaisha | Image pickup apparatus compensating an image signal for variations in color temperature |
US4774564A (en) * | 1986-09-09 | 1988-09-27 | Fuji Photo Film Co., Ltd. | Electronic still camera for compensating color temperature dependency of color video signals |
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