KR940027505A - Zoom tracking device and method of video camera - Google Patents

Zoom tracking device and method of video camera Download PDF

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KR940027505A
KR940027505A KR1019930008819A KR930008819A KR940027505A KR 940027505 A KR940027505 A KR 940027505A KR 1019930008819 A KR1019930008819 A KR 1019930008819A KR 930008819 A KR930008819 A KR 930008819A KR 940027505 A KR940027505 A KR 940027505A
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lens
zoom
focus
zoom lens
trace
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KR1019930008819A
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Korean (ko)
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KR0124588B1 (en
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이승익
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이헌조
주식회사 금성사
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Priority to KR1019930008819A priority Critical patent/KR0124588B1/en
Priority to CN94107585A priority patent/CN1039274C/en
Publication of KR940027505A publication Critical patent/KR940027505A/en
Priority to US08/540,238 priority patent/US5815203A/en
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10Mountings, 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
    • G02B7/102Mountings, 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
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B13/00Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32Means for focusing
    • G03B13/34Power focusing
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B3/00Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10Power-operated focusing
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66Digital/analogue converters
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B2205/00Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053Driving means for the movement of one or more optical element

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

Abstract

본 발명은 비디오 카메라(Video camera)의 리어(rear)촛점방식의 줌트래킹장치 및 방법에 관한 것으로, 줌렌즈(zoom lens)가 이동할때 촛점렌즈가 트레이스 궤적을 정확하게 추적할 수 있도록 한 줌트래킹(tracking)장치 및 방법을 제공함에 그 목적이 있다.The present invention relates to a rear focusing zoom tracking device and method of a video camera, wherein zoom tracking is performed so that the focusing lens accurately tracks the trace trajectory when the zoom lens moves. Its purpose is to provide an apparatus and method.

본 발명은 상기 목적을 달성하기 위하여 마이콤 내부의 롬에 최소한의 트레이스 궤적데이타만을 저장하고 줌렌즈의 위치검출 웨이퍼가 발생할 만한 영역에서는 촛점평가치를 이용하여 줌렌즈의 이동에 따른 촛점렌즈의 트레이스 궤적추적을 실현하여 정확한 트레이스 궤적추적이 이루어질 수 있도록 함을 특징으로 한다.In order to achieve the above object, the present invention realizes trace trace tracking of a focus lens according to movement of a zoom lens by using a focus evaluation value in a region where only a minimum trace trace data is stored in a ROM inside a microcomputer and where a wafer for detecting a zoom lens is generated. It is characterized in that to enable accurate trace trace tracking.

Description

비디오 카메라의 줌트래킹 장치 및 방법Zoom tracking device and method of video camera

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

제5도는 본 발명의 줌트래킹장치를 나타낸 블럭구성도. 제6도는 본 발명의 줌렌즈 위치에서의 피사체거리에 따른 촛점 렌즈의 트레이스 궤적도. 제7도는 본 발명의 줌트래킹 방법을 나타낸 상세흐름도. 제12도는 본 발명의 줌렌즈 위치에서의 피사체거리에 따른 촛점 렌즈의 트레이스 궤적도.5 is a block diagram showing a zoom tracking device of the present invention. 6 is a trace locus diagram of a focus lens according to a subject distance at a zoom lens position of the present invention. 7 is a detailed flowchart showing the zoom tracking method of the present invention. 12 is a trace locus diagram of a focus lens according to a subject distance at a zoom lens position of the present invention.

Claims (11)

피사체에 대해 주밍을 실행하기 위한 줌렌즈(1), 피사체에 대해 촛점을 맞추기 위한 촛점렌즈(10), 상기 줌렌즈(1)와 촛점렌즈(10)를 통과한 영상을 전기적 신호로 전환하는 CCD(13), 상기 CCD(13)의 출력영상신호의 촛점평가치를 검출하는 촛점평가치 검출수단(15), 상기 줌렌즈(1)와 촛점렌즈(10)의 위치를 검출하는 위치 검출수단, 촛점평가치 최대점에서의 줌렌즈(1)와 촛점렌즈(10)의 위치 정보로써 피사체 거리를 계산하여 줌트래킹을 제어하는 마이콤(7)으로 구성함을 특징으로 하는 줌트래킹 장치A zoom lens 1 for zooming on a subject, a focus lens 10 for focusing on a subject, and a CCD 13 for converting an image passing through the zoom lens 1 and the focus lens 10 into an electrical signal. ), A focus evaluation value detecting means 15 for detecting a focus evaluation value of the output image signal of the CCD 13, a position detecting means for detecting positions of the zoom lens 1 and the focus lens 10, and a focus evaluation value maximum Zoom tracking device, characterized in that it comprises a micom (7) for controlling the zoom tracking by calculating the distance of the subject as the position information of the zoom lens (1) and the focus lens (10) at the point 제1항에 있어서, 상기 마이콤(7)의 제어에 의해 상기 줌렌즈(1)를 이동시키는 줌렌즈 구동 수단(3,4), 상기 마이콤(7)의 제어에 의해 상기 촛점렌즈(10)를 이동시키는 촛점렌즈 구동수단(9,11)을 더 구비하여 구성함을 특징으로 하는 줌트래킹 장치.The zoom lens driving means (3,4) for moving the zoom lens (1) under the control of the microcomputer (7), and for moving the focus lens (10) under the control of the microcomputer (7). Zoom tracking device characterized in that it further comprises a focus lens driving means (9,11). 제1항에 있어서, 상기 촛점평가치 검출수단(15)은, 상기 CCD(13)에서 출력한 영상신호의 고주파성분을 검출하는 대역필터(20,21), 상기 CCD(13)에서 출력한 영상신호의 저주파 성분을 검출하여 휘도의 변화를 검색하기 위한 저역필터(22), 상기 대역필터(20,21)와 저역필터(22)의 출력신호를 상기 마이콤(7)의 제어에 따라 선택적으로 추출하는 스위치부(23) ; 상기 스위치부(23)의 출력신호를 디지탈로 변환하여 출력하는 A/D 변환부(24), 디지탈로 변환된 데이타를 면적분할한후 각면적에 대해 디지탈적분을 하여 마이콤(7)에 전송하는 게이트 어레이부(25)로 구성됨을 특징으로 하는 줌트래킹 장치.The image pickup apparatus according to claim 1, wherein the focus evaluation value detecting means (15) comprises: band filters (20, 21) for detecting high frequency components of the video signal output from the CCD (13), and an image output from the CCD (13). Selectively extract the output signals of the low pass filter 22, the band pass filters 20, 21 and the low pass filter 22 to detect low frequency components of the signal and to search for a change in luminance. Switch unit 23 to be made; The A / D converter 24 which converts the output signal of the switch unit 23 into a digital signal and outputs the digital signal to the microcomputer 7 by dividing the digitally converted data and then performing digital integration on each area. Zoom tracking device, characterized in that consisting of a gate array (25). 제1항에 있어서, 상기 위치검출수단은 상기 줌렌즈(1)의 위치를 감지하는 줌위치센서(2), 상기 줌위치센서(2)에 의해 감지된 줌렌즈(1)의 각위치를 코드화하여 상기 마이콤(7)에 전송하는 A/D 변환부(6), 상기 촛점렌즈(10)의 위치를 감지하는 촛점위치센서(8), 상기 촛점위치센서(8)에 의해 감지된 촛점렌즈(10)의 위치를 검출하여 상기 마이콤(7)에 전송하는 촛점위치 검출부(12)로 구성됨을 특징으로 하는 줌트래킹장치.The method of claim 1, wherein the position detecting means encodes each position of the zoom position sensor (2) for detecting the position of the zoom lens (1) and the zoom lens (1) detected by the zoom position sensor (2). A / D converter 6 for transmitting to the microcomputer 7, a focus position sensor 8 for detecting the position of the focus lens 10, the focus lens 10 detected by the focus position sensor 8 Zoom tracking device, characterized in that consisting of a focus position detector for detecting the position of the transmission to the microcomputer (12). 제1항에 있어서, 상기 마이콤(7)은 줌렌즈(1)위치의 리드에러에 관계없이 피사체 거리에 대한 트레이스 궤적이 현격하게 차이가 나는 영역에는 각피사체 거리에 대한 트레이스 궤적 데이타를 저장하고 줌렌즈(1)의 위치검출에러에 의해 피사체거리를 잘못 계산할 수 있는 영역에서는 최상 및 최하의 피사체 거리에 따른 트레이스 궤적 데이타 만을 저장함을 특징으로 하는 줌트래킹 장치.According to claim 1, wherein the microcomputer (7) stores the trace trace data for each subject distance in the area where the trace trajectory for the subject distance is significantly different regardless of the lead error of the position of the zoom lens (1) and zoom lens ( A zoom tracking device, characterized in that it stores only the trace trajectory data according to the highest and lowest subject distance in an area where the subject distance can be incorrectly calculated by the position detection error of 1). 제4항에 있어서, 상기 A/D 변환부(6)는 마이콤 내부의 A/D 변환부로 구성함을 특징으로 하는 줌 트래킹 장치.The zoom tracking device according to claim 4, wherein the A / D converter (6) comprises an A / D converter inside the microcomputer. 줌렌즈(1)위치의 리드에러에 의해 피사체 거리에 대한 트레이스 궤적이 잘못판단되지 않는 지점을 줌렌즈(1)가 통과할때는 그 지점의 평가치 최대점의 렌즈(1,10) 정보로 피사체 거리를 계산하는 제1단계, 줌렌즈(1)위치의 리드에러에 관계없이 피사체 거리에 대한 트레이스 궤적이 현격하게 차이가 나는 영역에서는 피사체 거리에 대한 트레이스 궤적 데이타에 의한 렌즈(1,10)정보로 피사페 거리를 계산하는 제2단계, 상기 제1단계 또는 제2단계에 의해 계산된 피사체 거리데이타로 줌트래킹을 실행하는 제3단계로 이루어짐을 특징으로 하는 줌트래킹 방법.When the zoom lens 1 passes a point where the trace trajectory for the subject distance is not judged incorrectly due to a lead error at the position of the zoom lens 1, the subject distance is calculated using the lens (1, 10) information of the maximum value of the evaluation point at that point. In the first step, where the trace trajectory of the subject distance is significantly different regardless of the lead error of the position of the zoom lens 1, the Pisape distance is determined by the lens (1,10) information based on the trace trajectory data of the subject distance. And a third step of performing zoom tracking with the subject distance data calculated by the first step or the second step. 제7항에 있어서, 상기 제1단계는 줌렌즈(1)의 주밍시작점 위치가 피사체 거리에 대해 트레이스 궤적이 잘못판단되지 않는 영역으로부터 와이드 방향에 위치하여 텔레단방향으로 이동하면 평가치가 최대인점의 렌즈(1,10)위치 정보를 저장하는 제1과정, 상기 제1과정후 줌렌즈(1)가 피사체 거리에 대해 트레이스 궤적이 잘못판단되지 않는 영역에 도달하면 그영역상에 존재하는 평가치 최대점의 줌렌즈(1)와, 촛점렌즈(10)의 위치정보로써 피사체 거리를 계산하는 제2과정(123,124), 줌렌즈(11)의 주밍 시작점 위치가 피사체 거리에 대해 트레이스 궤적이 잘못판단되지 않는 영역으로부터 텔레방향에 위치하여 와이드 방향으로 이동중 줌렌즈(1)가 피사체 거리에 대해 트레이스 궤적이 잘못판단되지 않는 영역에 도달하면 그 영역상에 존재하는 평가치 최대점의 줌렌즈(1)와 촛점렌즈(10)의 취치 정보로서 피사체 거리를 계산하는 제3과정(100,110,108,111,112,113)으로 이루어짐을 특징으로 하는 줌트래킹 방법.8. The lens according to claim 7, wherein the first step is a lens whose evaluation value is maximum when the zooming start point position of the zoom lens 1 is moved in the tele end direction in a wide direction from a region where the trace trajectory is not incorrectly determined with respect to the object distance. (1, 10) When the zoom lens 1 reaches the area where the trace trajectory is not incorrectly determined with respect to the object distance after the first step of storing the position information and after the first step, In the second process (123, 124) of calculating the subject distance using the zoom lens 1 and the positional information of the focus lens 10, the zooming start point position of the zoom lens 11 is determined from the area where the trace trajectory is not incorrectly determined with respect to the subject distance. Direction and when the zoom lens 1 reaches an area where the trace trajectory is not incorrectly determined with respect to the object distance while moving in the wide direction, The zoom tracking method of claim 3 constituted by any process (100110108111112113) for calculating the object distance as chwichi information of the lens 1 and the focusing lens 10. 제7항에 있어서, 상기 제2단계는 줌렌즈(1)가 와이드 방향으로 이동하면 주밍시작점에서의 렌즈 위치정보로서 피사체 거리를 계산하는 제1과정(100,101,110,108,111,112,113,128,124), 줌렌즈(1)의 주밍시작점 위치가 피사체 거리에 대해 트레이스 궤적이 잘못판단되지 않는 영역으로부터 텔레방향에 위치하고 줌렌즈(1)가 텔레방향으로 이동하면 주밍시작점에서의 렌즈 위치정보로써 피사체 거리를 계산하는 제2과정(100,101,102,110,108,111,112,113,114,124), 줌렌즈(1)의 주밍시작점 위치가 피사체 거리에 대해 트레이스 궤적이 잘못판단되지 않는 영역으로부터 와이드 방향에 위치하고 주밍하고자 하는 피사체의 거리가 피사체 거리에 대한 트레이스 궤적이 현격히 구별되어지는 지점 사이에 존재하면 주밍시작점에서의 렌즈 위치정보로써 피사체 거리를 계산하는 제3과정(100,101,102,103,110,108,111,112,113,114,115,116,124)으로 이루어짐을 특징으로 하는 줌트래킹 방법.The method of claim 7, wherein the first step (100, 101, 110, 108, 111, 112, 113, 128, 124) for calculating the subject distance as the lens position information at the zooming start point when the zoom lens 1 moves in the wide direction, The second process (100, 101, 102, 110, 108, 111, 112, 113, 114, 124), the zoom lens (1), which calculates the subject distance using the lens position information at the zooming start point when the zoom lens 1 moves in the tele direction from an area where the trace trajectory is not incorrectly determined with respect to the object distance. ), If the zooming start position is located in the wide direction from the area where the trace trajectory is not incorrectly determined with respect to the subject distance, and the distance of the subject to zoom is between the points where the trace trajectory for the subject distance is remarkably distinguished, The third process of calculating the subject distance using the lens position information (1 00,101,102,103,110,108,111,112,113,114,115,116,124. 제7항에 있어서, 상기 제3단계는 상기 제1단계 또는 제2단계에서 계산한 촛점렌즈(10)의 위치와 추적해야할 피사체의 위치에 따른 촛점렌즈의 위치차 및 방향을 계산하는 제1과정(125), 상기 제1과정(125)에서 계산된 촛점렌즈(10)간의 위치차와 방향에 의해 촛점렌즈(10)간의 이동속도를 계산하는 제2과정(126), 추적해야할 궤적을 따라 촛점렌즈(10)를 이동시키는 제3과정(127)으로 이루어짐을 특징으로 하는 줌트래킹 방법.The method of claim 7, wherein the third step is a first step of calculating a position difference and a direction of the focus lens according to the position of the focus lens 10 calculated in the first or second step and the position of the subject to be tracked. 125, a second process 126 of calculating a moving speed between the focus lenses 10 based on a position difference and a direction between the focus lenses 10 calculated in the first process 125, and focusing along a trajectory to be tracked Zoom tracking method, characterized in that consisting of a third process (127) for moving the lens (10). 제8항에 있어서, 상기 제1과정은 주밍시작점에서의 촛점평가치 최대점을 찾는 과정(100,101,102,103,104,105,106,107), 줌렌즈(1)를 텔레방향으로 이동시키면서 평가치 증, 감 상태를 검출하는 과정(108,109,112,113,114,115,116,117), 평가치가 증가하다가 감소되는 지점에 도달하면 평가치 최대점으로 인식, 그점에서의 줌렌즈(1)와 촛점렌즈(10)의 위치정보를 저장하는 과정(117,118,119,120,121,122)으로 이루어짐을 특징으로 하는 줌트래킹 방법.The method of claim 8, wherein the first process comprises: finding the maximum focal evaluation value at the zooming start point (100, 101, 102, 103, 104, 105, 106, 107), and detecting the increase or decrease of the evaluation value by moving the zoom lens 1 in the tele direction (108, 109, 112, 113, 114, 115, 116, 117). When the evaluation value increases and decreases to a point where the evaluation value is reached, the zoom tracking method comprises the steps of storing the position information of the zoom lens 1 and the focus lens 10 at that point (117, 118, 119, 120, 121, 122). . ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019930008819A 1993-05-20 1993-05-21 Method for zoom tracking of video camera KR0124588B1 (en)

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CN94107585A CN1039274C (en) 1993-05-20 1994-05-20 Zoom tracking apparatus and method in video camera
US08/540,238 US5815203A (en) 1993-05-20 1995-10-05 Zoom tracking apparatus and method in a video camera

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KR100595349B1 (en) * 1997-08-28 2006-09-28 소니 가부시끼 가이샤 Lens control device, imaging device and lens control method

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JP5352377B2 (en) * 2009-08-10 2013-11-27 三星電子株式会社 Image processing apparatus and image processing method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100595349B1 (en) * 1997-08-28 2006-09-28 소니 가부시끼 가이샤 Lens control device, imaging device and lens control method

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