JPS56116391A - Automatic adjusting device of white balance - Google Patents
Automatic adjusting device of white balanceInfo
- Publication number
- JPS56116391A JPS56116391A JP1993380A JP1993380A JPS56116391A JP S56116391 A JPS56116391 A JP S56116391A JP 1993380 A JP1993380 A JP 1993380A JP 1993380 A JP1993380 A JP 1993380A JP S56116391 A JPS56116391 A JP S56116391A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- white
- control
- output
- input
- 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.)
- Granted
Links
- 238000005070 sampling Methods 0.000 abstract 3
- 230000003321 amplification Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To enable to reproduce the specified white color, by controlling each amplifier for R and B signals in case of white objective, through the discrimination whether or not being the white objective, by the detection of minimum hue in the high luminance. CONSTITUTION:R-Y signal and B-Y signal fed from a matrix circuit 4 are clamped 10, 11 respectively, then the outputs VY, VX obtained from the amplifications 14, 15 of each output level of the R-Y signal and B-Y signal at minimum hue which are obtained from the sampling based on the sampling pulse for each clamp output at the 1st and 2nd sampling circuits 12, 13, are input to a color discrimination circuit 16 for discrimination. The amplified outputs VY, VX are input to the 1st and 2nd control circuits 19, 20 only when the 1st and 2nd switching circuits 17, 18 pick up the white part, in which the discriminated output is taken as the control input, and the white balance of the white part detected through the control of the amplified gain of the R signal amplifier 2 and the B signal amplifier 3 is automatically adjusted with each control output.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1993380A JPS56116391A (en) | 1980-02-19 | 1980-02-19 | Automatic adjusting device of white balance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1993380A JPS56116391A (en) | 1980-02-19 | 1980-02-19 | Automatic adjusting device of white balance |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56116391A true JPS56116391A (en) | 1981-09-12 |
JPS6251557B2 JPS6251557B2 (en) | 1987-10-30 |
Family
ID=12013010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1993380A Granted JPS56116391A (en) | 1980-02-19 | 1980-02-19 | Automatic adjusting device of white balance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56116391A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61184079A (en) * | 1985-02-08 | 1986-08-16 | Toshiba Corp | Circuit and system for controlling automatic white balance |
JPS62128692A (en) * | 1985-11-29 | 1987-06-10 | Matsushita Electric Ind Co Ltd | Video camera device |
JPS6313489A (en) * | 1986-07-03 | 1988-01-20 | Matsushita Electric Ind Co Ltd | White balance adjusting device |
JPS6320993A (en) * | 1986-07-15 | 1988-01-28 | Matsushita Electric Ind Co Ltd | White balance adjusting device |
US4797733A (en) * | 1986-12-12 | 1989-01-10 | Hitachi, Ltd. | White balance adjusting device for a color video camera |
JPH01112887A (en) * | 1987-10-27 | 1989-05-01 | Canon Inc | White balance adjusting device |
JPH01264088A (en) * | 1987-12-29 | 1989-10-20 | Fuji Photo Film Co Ltd | Method and apparatus for automatic adjustment of white balance |
US7352409B2 (en) | 2002-04-09 | 2008-04-01 | Sanyo Electric Co., Ltd. | Blue stretch circuit and level detection circuit |
-
1980
- 1980-02-19 JP JP1993380A patent/JPS56116391A/en active Granted
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61184079A (en) * | 1985-02-08 | 1986-08-16 | Toshiba Corp | Circuit and system for controlling automatic white balance |
JPS62128692A (en) * | 1985-11-29 | 1987-06-10 | Matsushita Electric Ind Co Ltd | Video camera device |
JPS6313489A (en) * | 1986-07-03 | 1988-01-20 | Matsushita Electric Ind Co Ltd | White balance adjusting device |
JPH0728415B2 (en) * | 1986-07-03 | 1995-03-29 | 松下電器産業株式会社 | White balance adjustment device |
JPS6320993A (en) * | 1986-07-15 | 1988-01-28 | Matsushita Electric Ind Co Ltd | White balance adjusting device |
US4797733A (en) * | 1986-12-12 | 1989-01-10 | Hitachi, Ltd. | White balance adjusting device for a color video camera |
JPH01112887A (en) * | 1987-10-27 | 1989-05-01 | Canon Inc | White balance adjusting device |
JPH01264088A (en) * | 1987-12-29 | 1989-10-20 | Fuji Photo Film Co Ltd | Method and apparatus for automatic adjustment of white balance |
US7352409B2 (en) | 2002-04-09 | 2008-04-01 | Sanyo Electric Co., Ltd. | Blue stretch circuit and level detection circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6251557B2 (en) | 1987-10-30 |
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