JPS5550795A - Rbg chroma key signal generator - Google Patents
Rbg chroma key signal generatorInfo
- Publication number
- JPS5550795A JPS5550795A JP12409078A JP12409078A JPS5550795A JP S5550795 A JPS5550795 A JP S5550795A JP 12409078 A JP12409078 A JP 12409078A JP 12409078 A JP12409078 A JP 12409078A JP S5550795 A JPS5550795 A JP S5550795A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- signals
- gain
- circuit
- arbitrary
- 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
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE: To carry out the automatic adjustment of white balance by extracting arbitrary specific position of the television image surface as the marker and carrying out the gain adjustment of other signals as reference of the arbitrary signal of the portion of the marker.
CONSTITUTION: The gate pulse synchronizing with the image signal is generated in the gate pulse generating circuit 11, outputted to the gate circuits 7∼9 to determine the arbitrary position of the image surface. The gate circuits 7∼9 receives the gate pulse and outputs B, G, R signals of the specific portion of the image surface as the marker to the level difference detection and control circuit 10. As reference to the arbitrary signals B, G, R, the gain adjusting signal for adjusting the gain of two signals is formed in the circuit 10 to output to the gain adjusting circuit 1∼3. In the circuit 1∼3, B, G, R signals are adjusted in gain so as to reach the same level of B, G, R signal. Accordingly, the B, G, R signal inputting to the matrix 4 is situated at the same level and the output thereof is no signal, so that it can be made white or grey.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12409078A JPS5550795A (en) | 1978-10-11 | 1978-10-11 | Rbg chroma key signal generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12409078A JPS5550795A (en) | 1978-10-11 | 1978-10-11 | Rbg chroma key signal generator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5550795A true JPS5550795A (en) | 1980-04-12 |
Family
ID=14876670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12409078A Pending JPS5550795A (en) | 1978-10-11 | 1978-10-11 | Rbg chroma key signal generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5550795A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6234494A (en) * | 1985-08-07 | 1987-02-14 | Canon Inc | Video signal processor |
US4679067A (en) * | 1984-04-09 | 1987-07-07 | Corporate Communications Consultants, Inc. | Color correction system and method with localized color sampling |
US5182636A (en) * | 1990-02-15 | 1993-01-26 | Sony Corporation | Color video camera with auto-white balance control |
US5282024A (en) * | 1989-08-23 | 1994-01-25 | Canon Kabushiki Kaisha | White balance correction device |
JPH0713540A (en) * | 1993-06-21 | 1995-01-17 | Nec Corp | Transparent color processing circuit |
-
1978
- 1978-10-11 JP JP12409078A patent/JPS5550795A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4679067A (en) * | 1984-04-09 | 1987-07-07 | Corporate Communications Consultants, Inc. | Color correction system and method with localized color sampling |
JPS6234494A (en) * | 1985-08-07 | 1987-02-14 | Canon Inc | Video signal processor |
US5282024A (en) * | 1989-08-23 | 1994-01-25 | Canon Kabushiki Kaisha | White balance correction device |
US5182636A (en) * | 1990-02-15 | 1993-01-26 | Sony Corporation | Color video camera with auto-white balance control |
JPH0713540A (en) * | 1993-06-21 | 1995-01-17 | Nec Corp | Transparent color processing circuit |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5550795A (en) | Rbg chroma key signal generator | |
JPS5279729A (en) | Color adjusting circuit of color television | |
JPS5416918A (en) | Background density compensating circuit | |
JPS5779944A (en) | Detector for equal color tone region | |
JPS543418A (en) | Picture reading device | |
JPS53132214A (en) | Vertical aperture correction circuit | |
JPS5417623A (en) | Scanning-speed modulator circuit | |
JPS5416919A (en) | Automaic gain control circuit | |
JPS53126817A (en) | Level controller of video signal | |
GB1512149A (en) | Colour television | |
JPS5454523A (en) | Superimposing system for letter and graphic signal | |
JPS5225531A (en) | Integration type floating comparator | |
JPS5210613A (en) | Two-value conversion circuit of image signal | |
JPS5436122A (en) | Generator for still picture signal | |
JPS5437627A (en) | Picture quality adjusting circuit | |
JPS52124821A (en) | Picture output circuit | |
JPS5588462A (en) | Scanning timing detector | |
JPS53138232A (en) | Generating circuit for hue control signal | |
JPS51120627A (en) | Character signal correction circuit | |
JPS53126213A (en) | Discriminating circuit for vir signal | |
JPS5250616A (en) | Outline compensation device | |
JPS51118321A (en) | Automatic frequency character controlled circuit for color tv set | |
JPS5541057A (en) | Color solidstate pick up unit | |
JPS5423427A (en) | Beam index television picture receiver | |
JPS5431229A (en) | Signal processor |