JPS5451717A - Soft chromakey system - Google Patents

Soft chromakey system

Info

Publication number
JPS5451717A
JPS5451717A JP11845577A JP11845577A JPS5451717A JP S5451717 A JPS5451717 A JP S5451717A JP 11845577 A JP11845577 A JP 11845577A JP 11845577 A JP11845577 A JP 11845577A JP S5451717 A JPS5451717 A JP S5451717A
Authority
JP
Japan
Prior art keywords
signal
circuit
component
chromakey
color
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
Application number
JP11845577A
Other languages
Japanese (ja)
Other versions
JPS6118919B2 (en
Inventor
Masahiro Yamanoi
Katsutoshi Ito
Kunikatsu Kumakura
Tatsuhiko Kondo
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.)
Fujitsu General Ltd
Japan Broadcasting Corp
Aerojet Rocketdyne Holdings Inc
Original Assignee
Nippon Hoso Kyokai NHK
Fujitsu General Ltd
Japan Broadcasting Corp
Gencorp Inc
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 Nippon Hoso Kyokai NHK, Fujitsu General Ltd, Japan Broadcasting Corp, Gencorp Inc filed Critical Nippon Hoso Kyokai NHK
Priority to JP11845577A priority Critical patent/JPS5451717A/en
Publication of JPS5451717A publication Critical patent/JPS5451717A/en
Publication of JPS6118919B2 publication Critical patent/JPS6118919B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)
  • Studio Circuits (AREA)

Abstract

PURPOSE: To eliminate the unnatural feeling and to enhance the quality of the composite screen by giving non-addition to the color killer signal which is obtained by eliminating the component of under the black level of the color difference signal whose high noise is eliminated and the chromakey signal obtained from the color difference signal via the stretch amplifier.
CONSTITUTION: The R, G and B signals sent from the color camera are applied to subtraction circuit 2 via hue matrix 1 to obtain color difference signal A-B, and this signal is made to pass through LPF3, delay line 4, stretch amplifier 5 and output circuit 6 to obtain chromakey signal (c). Also, signal A-B is made to pass through LPF7 to eliminate the noise of high component, and then the signal component of over the black level is drawn out at forward linear clipper circuit 8 to obtain color killer signal (b) via delay line 9 and video amplifier circuit 10. The component of signal (b) of more than the prescribed level is eliminated through white clipper circuit 13 to obtain shadow signal (d). Signal (d) is then applied to non-addition circuit 14 to be non-added with signal (c) and to obtain the soft chromakey signal
COPYRIGHT: (C)1979,JPO&Japio
JP11845577A 1977-09-30 1977-09-30 Soft chromakey system Granted JPS5451717A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11845577A JPS5451717A (en) 1977-09-30 1977-09-30 Soft chromakey system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11845577A JPS5451717A (en) 1977-09-30 1977-09-30 Soft chromakey system

Publications (2)

Publication Number Publication Date
JPS5451717A true JPS5451717A (en) 1979-04-23
JPS6118919B2 JPS6118919B2 (en) 1986-05-14

Family

ID=14737059

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11845577A Granted JPS5451717A (en) 1977-09-30 1977-09-30 Soft chromakey system

Country Status (1)

Country Link
JP (1) JPS5451717A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58117787A (en) * 1981-12-30 1983-07-13 Sony Corp Chromakey device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58117787A (en) * 1981-12-30 1983-07-13 Sony Corp Chromakey device

Also Published As

Publication number Publication date
JPS6118919B2 (en) 1986-05-14

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