JPS5742270A - Masking method for picture - Google Patents

Masking method for picture

Info

Publication number
JPS5742270A
JPS5742270A JP11857980A JP11857980A JPS5742270A JP S5742270 A JPS5742270 A JP S5742270A JP 11857980 A JP11857980 A JP 11857980A JP 11857980 A JP11857980 A JP 11857980A JP S5742270 A JPS5742270 A JP S5742270A
Authority
JP
Japan
Prior art keywords
monitor
composite video
threshold value
picture
signal
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
Application number
JP11857980A
Other languages
Japanese (ja)
Inventor
Yutaka Kubota
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.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co 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 Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Priority to JP11857980A priority Critical patent/JPS5742270A/en
Publication of JPS5742270A publication Critical patent/JPS5742270A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects

Abstract

PURPOSE:To effectively pick up only the specific part on a monitor TV, by making signal processing so that the masking part can be decided at 1H period when a threshold value is detected by a timer circuit and repeating this operation when a vertical synchronizing signal is obtained. CONSTITUTION:A video camera 1 picks up an objective and a monitor TV2 obtains a composite video signal transmitted from the camera 1 for monitor picture. A signal processing section 3 processes the composite video signal and obtains the picture for the specific part only, the threshold value of the composite video signal is detected at a threshold value detection section 3a for the judgement of the composite video level. When this output exceeds a set level, setting is made and resetting is made at the next vertical synchronizing signal after the end of one horizontal scanning, and similar operation can be repeated at the next horizontal scanning. Thus, such an inconvenience as making of a part of the specific part to be desired or the appearance of unnecessary part can be avoided on the monitor TV.
JP11857980A 1980-08-28 1980-08-28 Masking method for picture Pending JPS5742270A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11857980A JPS5742270A (en) 1980-08-28 1980-08-28 Masking method for picture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11857980A JPS5742270A (en) 1980-08-28 1980-08-28 Masking method for picture

Publications (1)

Publication Number Publication Date
JPS5742270A true JPS5742270A (en) 1982-03-09

Family

ID=14740076

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11857980A Pending JPS5742270A (en) 1980-08-28 1980-08-28 Masking method for picture

Country Status (1)

Country Link
JP (1) JPS5742270A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308195A1 (en) 1982-03-11 1983-09-22 Hajime Industries, Ltd., Tokyo IMAGE DATA MASKING DEVICE

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5152740A (en) * 1974-11-05 1976-05-10 Hitachi Ltd
JPS54143168A (en) * 1978-04-28 1979-11-08 Fuji Electric Co Ltd Appearance tester

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5152740A (en) * 1974-11-05 1976-05-10 Hitachi Ltd
JPS54143168A (en) * 1978-04-28 1979-11-08 Fuji Electric Co Ltd Appearance tester

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308195A1 (en) 1982-03-11 1983-09-22 Hajime Industries, Ltd., Tokyo IMAGE DATA MASKING DEVICE

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