KR940017752A - Automatic focusing control of video camera - Google Patents

Automatic focusing control of video camera Download PDF

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Publication number
KR940017752A
KR940017752A KR1019920023130A KR920023130A KR940017752A KR 940017752 A KR940017752 A KR 940017752A KR 1019920023130 A KR1019920023130 A KR 1019920023130A KR 920023130 A KR920023130 A KR 920023130A KR 940017752 A KR940017752 A KR 940017752A
Authority
KR
South Korea
Prior art keywords
signal
filter
counter
pulse
video camera
Prior art date
Application number
KR1019920023130A
Other languages
Korean (ko)
Other versions
KR960014833B1 (en
Inventor
장지영
Original Assignee
이헌조
주식회사 금성사
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 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019920023130A priority Critical patent/KR960014833B1/en
Priority to JP5299666A priority patent/JPH06233173A/en
Publication of KR940017752A publication Critical patent/KR940017752A/en
Priority to US08/601,466 priority patent/US5614951A/en
Application granted granted Critical
Publication of KR960014833B1 publication Critical patent/KR960014833B1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

본 발명은 패닝을 판단하여 자동 촛점 제어를 정확하게 수행할 수 있는 비디오 카메라의 자동 촛점 제어장치에 관한 것으로 CCD(2)와, 샘플 앤 홀드 및 AGC부(3)와, 이 출력을 받아 신호를 처리하는 신호처리부(4)와, 이의 출력에서 노이즈를 제거하기 위해 필터링하는 필터(6)로 된 것에 있어서, 필터(6)의 일부신호를 비교기(11)에 입력시켜 기준레벨보다 높은 신호 부분에서 펄수가 발생하게 하고, 펄스의 라이징 에지 부분을 검출하여 카운터(12)에서 계속하며, 계수된 값을 제1, 제2 레치(13)(14)에서 1필드분씩 딜레이시켜 전 필드분 카운터와 현 필드분의 카운터수를 비교하여 그 차이분의 절대치를 취한 후 일정 임게치 이상인가 이하인가에 따라 해당 레벨을 발생시켜 화면 전체의 변동을 판별하도록 한 것이다.The present invention relates to an automatic focus control apparatus of a video camera capable of accurately performing automatic focus control by judging panning. The present invention relates to a CCD (2), a sample-and-hold and AGC unit (3), and a signal received to process a signal. In the signal processing section 4 and a filter 6 for filtering to remove noise from the output thereof, a part of the signal of the filter 6 is input to the comparator 11 so as to obtain a pulse at a signal portion higher than the reference level. The counter is detected, and the rising edge portion of the pulse is detected and continues at the counter 12, and the counted value is delayed by one field at the first and second latches 13 and 14, so that the counter for the previous field and the current field are generated. By comparing the number of counters in minutes, the absolute value of the difference is taken, and the corresponding level is generated according to whether or not the predetermined threshold value is equal to or less than to determine the variation of the entire screen.

Description

비디오 카메라의 자동 촛점 제어장치Automatic focusing control of video camera

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

제1도는 종래 자동 촛점 제어장치의 블럭도, 제2도는 본 발명 자동 촛점 제어장치의 블럭도, 제3도는 본 발명에 따른 파형도, 제4도는 본 발명의 자동 촛점 제어를 설명하기 위한 도면.1 is a block diagram of a conventional automatic focus control apparatus, FIG. 2 is a block diagram of an automatic focus control apparatus according to the present invention, FIG. 3 is a waveform diagram according to the present invention, and FIG. 4 is a view for explaining automatic focus control according to the present invention.

Claims (2)

필터(6)와 마이크로 프로세서(9)사이에 패닝 판별부(17)를 구비하여 필터의 신호 일부를 피사체가 움직이는 것인지 패닝중인지를 판별토록 하는 것을 특징으로 하는 비디오 카메라의 자동 촛점 제어장치.And a panning discrimination unit (17) between the filter (6) and the microprocessor (9) to determine whether a part of the signal of the filter is moving or if the object is panning. 제1항에 있어서, 패닝 판별부(17)는 필터(6)의 출력을 일정 기준치와 비교하여 기준치보다 큰 레벨에서 펄스를 발생시키는 비교기(11)와, 상기 비교기(11)에서 발생된 펄스의 라이징 에지부분을 검출하여 카운트하는 카운터(12)와, 카운트수를 1필드씩 레치시키는 제1, 2 레치(13)(14)와, 먼저 레치된 카운트수와 다음 레치된 카운트수의 차이를 계산하여 절대화시키는 절대치화부(15)와, 상기 절대치화부(15)의 카운트수 차이와 임계치를 비교하여 해당 레벨을 발생시키는 임계치 비교부(16)를 포함하여서 구성함을 특징으로 하는 비디오 카메라의 자동 촛점 제어장치.The comparator 11 according to claim 1, wherein the panning determination unit 17 compares the output of the filter 6 with a predetermined reference value and generates a pulse at a level greater than the reference value. A counter 12 for detecting and counting a rising edge portion, first and second latches 13 and 14 for counting the number of counts by one field, and the difference between the number of latched counts and the number of latched counts And a threshold comparator 16 for generating an appropriate level by comparing the difference between counts of the absolute value unit 15 and a threshold value. Control unit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920023130A 1992-11-30 1992-12-02 Auto focus control device of a video camera KR960014833B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019920023130A KR960014833B1 (en) 1992-12-02 1992-12-02 Auto focus control device of a video camera
JP5299666A JPH06233173A (en) 1992-11-30 1993-11-30 Automatic focusing device of video tape recorder with camera and its method
US08/601,466 US5614951A (en) 1992-11-30 1996-02-14 Apparatus and method utilizing a slope for automatically focusing an object in a video camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920023130A KR960014833B1 (en) 1992-12-02 1992-12-02 Auto focus control device of a video camera

Publications (2)

Publication Number Publication Date
KR940017752A true KR940017752A (en) 1994-07-27
KR960014833B1 KR960014833B1 (en) 1996-10-21

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Application Number Title Priority Date Filing Date
KR1019920023130A KR960014833B1 (en) 1992-11-30 1992-12-02 Auto focus control device of a video camera

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100673966B1 (en) * 1999-09-16 2007-01-24 삼성테크윈 주식회사 Apparatus for detecting focus

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