GB2013448B - Measurement of chroma key area in television systems - Google Patents

Measurement of chroma key area in television systems

Info

Publication number
GB2013448B
GB2013448B GB7901961A GB7901961A GB2013448B GB 2013448 B GB2013448 B GB 2013448B GB 7901961 A GB7901961 A GB 7901961A GB 7901961 A GB7901961 A GB 7901961A GB 2013448 B GB2013448 B GB 2013448B
Authority
GB
United Kingdom
Prior art keywords
measurement
key area
television systems
chroma key
chroma
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.)
Expired
Application number
GB7901961A
Other versions
GB2013448A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Quantel Ltd
Original Assignee
Quantel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Quantel Ltd filed Critical Quantel Ltd
Priority to GB7901961A priority Critical patent/GB2013448B/en
Publication of GB2013448A publication Critical patent/GB2013448A/en
Application granted granted Critical
Publication of GB2013448B publication Critical patent/GB2013448B/en
Expired legal-status Critical Current

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)
GB7901961A 1978-01-30 1979-01-19 Measurement of chroma key area in television systems Expired GB2013448B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7901961A GB2013448B (en) 1978-01-30 1979-01-19 Measurement of chroma key area in television systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB370278 1978-01-30
GB7901961A GB2013448B (en) 1978-01-30 1979-01-19 Measurement of chroma key area in television systems

Publications (2)

Publication Number Publication Date
GB2013448A GB2013448A (en) 1979-08-08
GB2013448B true GB2013448B (en) 1983-02-23

Family

ID=26238527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7901961A Expired GB2013448B (en) 1978-01-30 1979-01-19 Measurement of chroma key area in television systems

Country Status (1)

Country Link
GB (1) GB2013448B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538182A (en) * 1981-05-11 1985-08-27 Canon Kabushiki Kaisha Image processing apparatus
US4463372A (en) * 1982-03-24 1984-07-31 Ampex Corporation Spatial transformation system including key signal generator
GB2305050A (en) * 1995-09-08 1997-03-26 Orad Hi Tec Systems Ltd Determining the position of a television camera for use in a virtual studio employing chroma keying
GB2305051B (en) * 1995-09-08 2000-06-21 Orad Hi Tec Systems Ltd Method and apparatus for automatic electronic replacement of billboards in a video image
JP4320064B2 (en) 1998-07-10 2009-08-26 富士通株式会社 Image processing apparatus and recording medium

Also Published As

Publication number Publication date
GB2013448A (en) 1979-08-08

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee