JPS5725784A - White balance detector - Google Patents

White balance detector

Info

Publication number
JPS5725784A
JPS5725784A JP10072480A JP10072480A JPS5725784A JP S5725784 A JPS5725784 A JP S5725784A JP 10072480 A JP10072480 A JP 10072480A JP 10072480 A JP10072480 A JP 10072480A JP S5725784 A JPS5725784 A JP S5725784A
Authority
JP
Japan
Prior art keywords
white
bpf2
ray tube
cathode
white balance
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
JP10072480A
Other languages
Japanese (ja)
Inventor
Yoshihisa Onmiyachi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP10072480A priority Critical patent/JPS5725784A/en
Publication of JPS5725784A publication Critical patent/JPS5725784A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To obtain an inexpensive and easy-to-carry white balance detector having a high accuracy, by realizing such a constitution that can detect the white balance onto a white/black cathode-ray tube. CONSTITUTION:A part of the output of a video input terminal 1 is applied to a BPF2, and the BPF2 separates a chroma signal in terms of the frequency. The output of the BPF2 is amplified by an amplifier 3. A wave detector 4 converts a chroma signal having a high frequency into a signal of a low frequency that is suited to the modulation of luminance of a cathode-ray tube. This converted signal is amplified by an amplifier 5 and applied to a cathode-ray tube 6. As a result, an image having the luminance corresponding to the level of chroma component is obtained on the screen the bube 6. Then a white-balanced point can be detected by taking notice of the white area of a subject.
JP10072480A 1980-07-21 1980-07-21 White balance detector Pending JPS5725784A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10072480A JPS5725784A (en) 1980-07-21 1980-07-21 White balance detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10072480A JPS5725784A (en) 1980-07-21 1980-07-21 White balance detector

Publications (1)

Publication Number Publication Date
JPS5725784A true JPS5725784A (en) 1982-02-10

Family

ID=14281567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10072480A Pending JPS5725784A (en) 1980-07-21 1980-07-21 White balance detector

Country Status (1)

Country Link
JP (1) JPS5725784A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6192090A (en) * 1984-10-12 1986-05-10 Canon Inc White balance device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6192090A (en) * 1984-10-12 1986-05-10 Canon Inc White balance device

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