KR890003214A - White Level Automatic Control for Video Cameras - Google Patents

White Level Automatic Control for Video Cameras Download PDF

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Publication number
KR890003214A
KR890003214A KR1019870008344A KR870008344A KR890003214A KR 890003214 A KR890003214 A KR 890003214A KR 1019870008344 A KR1019870008344 A KR 1019870008344A KR 870008344 A KR870008344 A KR 870008344A KR 890003214 A KR890003214 A KR 890003214A
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KR
South Korea
Prior art keywords
output
microcomputer
detector
color
signal
Prior art date
Application number
KR1019870008344A
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Korean (ko)
Other versions
KR900006469B1 (en
Inventor
박중배
Original Assignee
최근선
주식회사 금성사
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Application filed by 최근선, 주식회사 금성사 filed Critical 최근선
Priority to KR1019870008344A priority Critical patent/KR900006469B1/en
Publication of KR890003214A publication Critical patent/KR890003214A/en
Application granted granted Critical
Publication of KR900006469B1 publication Critical patent/KR900006469B1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Color Television Image Signal Generators (AREA)

Abstract

내용 없음No content

Description

비데오 카메라용 백색 레벨 자동 제어장치White Level Automatic Control for Video Cameras

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명 장치의 회로도. 제2도는 본 발명 장치의 프로그램 유통도.1 is a circuit diagram of an apparatus of the present invention. 2 is a program distribution diagram of the apparatus of the present invention.

Claims (1)

비데오 카메라내의 촬상관에서의 신호를 아날로그 디지탈 변환기를 통하여 마이크로컴퓨터에 연결하며, 수직동기신호 입력과 발진기를 마이크로컴퓨터에 연결하고, 마이크로컴퓨터의 색 신호출력을 각각 디지탈 아날로그 변환기, 버퍼 및 지역통과 여파기를 통해서 제어신호 단자에 연결한 것에 있어서, 칼라 감지기(1)의 출력을 제1및 제 2검출기(2,3)이 각각 연결하고, 제1검출기(2)의 출력은 샘플 및 홀드기(4)와 아날로그 디지탈 변환기(5)를 통하여 마이크로컴퓨터(7)이 색 온도 정보로 입력시키며, 제 2검출기(3)의 출력은 낮은 조도의 검출 출력으로 마이크로컴퓨터(7)에 연결하되 마이크로컴퓨터(7)내에는 시작시에 마이크로컴퓨터(7)의 색 신호 출력(R.B)을 초기화 한 다음 자동 백색 레벨 조절 스위치가 온 되었는가를 검출하는 제1단계와, 자동 백색 레벨 조절 스위치가 온 되지 않았으면 제 1단계로 되돌아가고 온 되었으면 제 2검출기(3)의 출력이 있는가를 조사하는 제 2단계와 제 2검출기(3)의 출력이 있으면 색 신호 출력(R,B)를 출력시키고 제 2단계로 되돌아가고 없으면 제 1검출기(2)의 출력은 샘플 및 홀드기(4) 및 아날로그 디지탈 변환기(5)를 통하여 데이타(Tc)로 받아들여 마이크로컴퓨터(7)내부의 메모리에 기억된 색 온도값(Dm)과, 비교하여 데이타(Tc)와 색온도값(Dm)의 절대값(Dif)을 산출하여 절대값(Dif)이 마이크로컴퓨터(7)내부의 메모리에 기억된 설정값(E)보다 큰가를 검사하는 제 3 단계와, 설정값(E)보다 절대값(Dif)이 크지 않으면 제 2 단계로 되돌아가고 설정값(E)보다 절대값(Dif)이 크면 메모리의 색 온도값(Dm)을 데이타(Tc)로 바꾸며 현재 색 온도(Tc)에 적당한 색신호 출력(R,B)을 산출하여 수직동기신호 입력(VS)이 있는가를 검출하는 제 4 단계와, 수직동기신호(VS)가 없으면 수직동기신호(VS)있을때 까지 대기하며 수직동기신호(VS)가 있으면 색 신호 출력(R,B)을 출력시키고 자동 백색 레벨 조절 스위치가 오프 되었는가를 검사하여 오프되지 않았으면 제 2 단계로 되돌아가고 오프 되었으면 끝내는 제 5 단계로 된 프로그램을 기억시켜된 비데오 카메라용 백색 레벨 자동 제어 장치.Connect the signal from the image tube in the video camera to the microcomputer through the analog digital converter, connect the vertical synchronous signal input and the oscillator to the microcomputer, and output the color signal output of the microcomputer to the digital analog converter, buffer and local pass filter respectively. In connection to the control signal terminal, the output of the color detector 1 is connected to the first and second detectors 2 and 3, respectively, and the output of the first detector 2 is the sample and hold device 4. And the microcomputer 7 inputs the color temperature information through the analog digital converter 5 and the output of the second detector 3 is connected to the microcomputer 7 with a low illumination detection output, but the microcomputer 7 In the first step of initializing the color signal output (RB) of the microcomputer 7 at the start, and then detecting whether the automatic white level adjustment switch is turned on; If the bell adjustment switch is not turned on, the process returns to the first stage and if it is turned on, if there is an output of the second detector 3 and whether there is an output of the second detector 3, the color signal output (R, B) If the output of the first detector 2 is not returned to the second step, the output of the first detector 2 is received as the data Tc through the sample and hold device 4 and the analog digital converter 5, and the memory of the microcomputer 7 The absolute value Dif of the data Tc and the color temperature value Dm is calculated by comparison with the color temperature value Dm stored in the memory, and the absolute value Dif is stored in the memory inside the microcomputer 7. A third step of checking whether the value E is greater than the value E; and if the absolute value Dif is not larger than the set value E, the process returns to the second step and if the absolute value Dif is larger than the set value E, the color of the memory Change the temperature value Dm into data Tc and calculate the color signal outputs R and B suitable for the current color temperature Tc. The fourth step of detecting whether there is a signal input VS, and if there is no vertical synchronous signal VS, waits until the vertical synchronous signal VS, and if there is a vertical synchronous signal VS, outputs the color signal outputs R and B. A white level automatic control device for a video camera, which stores a program of a fifth step which returns to the second step if it is not turned off and checks whether the automatic white level control switch is turned off. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019870008344A 1987-07-30 1987-07-30 Automatic white level control circuit for video camera KR900006469B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019870008344A KR900006469B1 (en) 1987-07-30 1987-07-30 Automatic white level control circuit for video camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019870008344A KR900006469B1 (en) 1987-07-30 1987-07-30 Automatic white level control circuit for video camera

Publications (2)

Publication Number Publication Date
KR890003214A true KR890003214A (en) 1989-04-13
KR900006469B1 KR900006469B1 (en) 1990-08-31

Family

ID=19263434

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870008344A KR900006469B1 (en) 1987-07-30 1987-07-30 Automatic white level control circuit for video camera

Country Status (1)

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KR (1) KR900006469B1 (en)

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Publication number Publication date
KR900006469B1 (en) 1990-08-31

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