JPS5767390A - Chromakey composing device - Google Patents
Chromakey composing deviceInfo
- Publication number
- JPS5767390A JPS5767390A JP14497280A JP14497280A JPS5767390A JP S5767390 A JPS5767390 A JP S5767390A JP 14497280 A JP14497280 A JP 14497280A JP 14497280 A JP14497280 A JP 14497280A JP S5767390 A JPS5767390 A JP S5767390A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- chromakey
- blur
- foreground
- color video
- 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
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
- H04N9/74—Circuits for processing colour signals for obtaining special effects
- H04N9/75—Chroma key
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To compose natural chromakey by introducing space filtering which generates ''blur'' in color video signals into chromakey processing. CONSTITUTION:A color video signal VA applied from an input terminal 1 is treated as the foreground signal of a panoramic photograph including chromakey back and a color video signal VB applied from an input terminal 2 is treated as a background signal for insertion. These two signals are sent to two-dimentional filter circuits 3, 4 and, after ''blur'' processing, they are inputted in a video mixing circuit 8 as a foreground signal VA' and a background signal VB' respectively. The signal VA' is also sent to a chromakey signal generating circuit 7 to generate a chromakey signal KEY with tone wedge. Thus, if the degree of ''blur'' is high, ''blur'' is generated also in the chromakey back picture at the same time as blurring of the foreground picture, so that the generated signal KEY operates as a signal with loose leading at the border of the chromakey back picture.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14497280A JPS5767390A (en) | 1980-10-15 | 1980-10-15 | Chromakey composing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14497280A JPS5767390A (en) | 1980-10-15 | 1980-10-15 | Chromakey composing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5767390A true JPS5767390A (en) | 1982-04-23 |
Family
ID=15374474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14497280A Pending JPS5767390A (en) | 1980-10-15 | 1980-10-15 | Chromakey composing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5767390A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0881597A2 (en) * | 1997-05-30 | 1998-12-02 | Quantel Limited | An electronic graphic system |
-
1980
- 1980-10-15 JP JP14497280A patent/JPS5767390A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0881597A2 (en) * | 1997-05-30 | 1998-12-02 | Quantel Limited | An electronic graphic system |
EP0881597A3 (en) * | 1997-05-30 | 2000-01-19 | Quantel Limited | An electronic graphic system |
US6292167B1 (en) | 1997-05-30 | 2001-09-18 | Quantel Limited | Electronic graphic system |
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