ES2072894T3 - Aparato de control de foco y metodos. - Google Patents

Aparato de control de foco y metodos.

Info

Publication number
ES2072894T3
ES2072894T3 ES89302118T ES89302118T ES2072894T3 ES 2072894 T3 ES2072894 T3 ES 2072894T3 ES 89302118 T ES89302118 T ES 89302118T ES 89302118 T ES89302118 T ES 89302118T ES 2072894 T3 ES2072894 T3 ES 2072894T3
Authority
ES
Spain
Prior art keywords
lens
theta
video signal
indicative
gradient
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.)
Expired - Lifetime
Application number
ES89302118T
Other languages
English (en)
Inventor
Koji Iwamoto
Kenichi Hamada
Katsuaki Hirota
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.)
Sony Corp
Original Assignee
Sony 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
Priority claimed from JP63051294A external-priority patent/JP2759955B2/ja
Priority claimed from JP63051293A external-priority patent/JP2789593B2/ja
Priority claimed from JP63214360A external-priority patent/JP2737945B2/ja
Application filed by Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of ES2072894T3 publication Critical patent/ES2072894T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H04N23/673—Focus control based on electronic image sensor signals based on contrast or high frequency components of image signals, e.g. hill climbing method
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/633—Control of cameras or camera modules by using electronic viewfinders for displaying additional information relating to control or operation of the camera
    • H04N23/635—Region indicators; Field of view indicators

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

SISTEMA CONTROLADOR DEL ENFOQUE PARA UNA CAMARA DE VIDEO QUE DETERMINA UN PRIMER GRADIENTE ((THETA)0) INDICATIVO DEL CAMBIO EN EL VALOR DE UN COMPONENTE DE FRECUENCIA PREDETERMINADA EN LA SEÑAL VIDEO PARA UNA PRIMERA Y UNA SEGUNDA POSICIONES DE LENTE (IM,IM+1) OBTENIDAS A PARTIR DE LA SEÑAL DEL COMPONENTE DE FRECUENCIA PREDETERMINADA EN LA SEÑAL VIDEO MUESTREADA EN LA PRIMERA POSICION DE LA LENTE (IM) Y EN LA SEGUNDA POSICION DE LA LENTE (IM+1), Y DETERMINA UN SEGUNDO GRADIENTE ((THETA)1) INDICATIVO DEL CAMBIO EN EL VALOR DEL COMPONENTE DE FRECUENCIA PREDETERMINADA EN LA SEÑAL VIDEO PARA UNA SEGUNDA POSICION DE LENTE (IM+1) Y UNA TERCERA POSICION DE LENTE (IM+2) OBTENEDA A PARTIR DE LA SEÑAL MUESTREADA POR LA TERCERA POSICION DE LENTE (IM+2). LA VELOCIDAD DEL MOVIMIENTO LONGITUDINAL DE LA LENTE ES CONTROLADA DE ACUERDO CON LOS CAMBIOS PRODUCIDOS EN EL PRIMER Y SEGUNDO GRADIENTES ((THETA)0,(THETA)1), PERMITIENDO ASI UN ENFOQUE MAS RAPIDO Y REDUCIENDO EL DESFASE DE LA LENTE DURANTE EL ENFOQUE.
ES89302118T 1988-03-04 1989-03-03 Aparato de control de foco y metodos. Expired - Lifetime ES2072894T3 (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP63051294A JP2759955B2 (ja) 1988-03-04 1988-03-04 焦点制御装置
JP63051293A JP2789593B2 (ja) 1988-03-04 1988-03-04 端点検出装置
JP63214360A JP2737945B2 (ja) 1988-08-29 1988-08-29 フォーカス制御装置

Publications (1)

Publication Number Publication Date
ES2072894T3 true ES2072894T3 (es) 1995-08-01

Family

ID=27294266

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89302118T Expired - Lifetime ES2072894T3 (es) 1988-03-04 1989-03-03 Aparato de control de foco y metodos.

Country Status (4)

Country Link
US (1) US5005086A (es)
EP (1) EP0331502B1 (es)
DE (1) DE68922872T2 (es)
ES (1) ES2072894T3 (es)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2974339B2 (ja) * 1989-09-20 1999-11-10 キヤノン株式会社 自動焦点調節装置
US5341220A (en) * 1990-01-08 1994-08-23 Nikon Corporation Still picture imaging apparatus having an improved automatic exposure control and reduction in power consumption
US5235428A (en) * 1990-02-21 1993-08-10 Sony Corporation Auto-focus system for video camera
JPH03243071A (ja) * 1990-02-21 1991-10-30 Sony Corp オートフォーカス回路
JP2748637B2 (ja) * 1990-03-09 1998-05-13 ソニー株式会社 オートフォーカス制御装置
DE69124167T2 (de) * 1990-08-31 1997-06-05 Victor Company Of Japan Bildaufnahmevorrichtung mit Fokussierungsfunktion
JP2851713B2 (ja) * 1991-04-03 1999-01-27 シャープ株式会社 オートフォーカス装置
JP2977979B2 (ja) * 1991-11-28 1999-11-15 キヤノン株式会社 自動焦点調節装置
KR950010932B1 (ko) * 1992-02-29 1995-09-25 삼성전자주식회사 비디오 카메라의 오토메틱 포커스 회로
US5757429A (en) * 1993-06-17 1998-05-26 Sanyo Electric Co., Ltd. Automatic focusing apparatus which adjusts the speed of focusing based on a change in the rate of the focus evaluating value
US6095421A (en) * 1994-06-30 2000-08-01 Symbol Technologies, Inc. Apparatus and method for scanning a symbol using an intelligent laser focus control
US5664238A (en) * 1994-11-28 1997-09-02 Ricoh Company, Ltd. Focal controller of camera
US6163340A (en) * 1995-03-27 2000-12-19 Canon Kabushiki Kaisha Automatic focus adjusting device
US6220513B1 (en) * 1997-12-31 2001-04-24 Ncr Corporation Methods and apparatus for determining bar code label location information
US7538815B1 (en) * 2002-01-23 2009-05-26 Marena Systems Corporation Autofocus system and method using focus measure gradient
JP2003215440A (ja) * 2002-01-24 2003-07-30 Casio Comput Co Ltd オートフォーカス方法、及びオートフォーカス装置
US8159561B2 (en) * 2003-10-10 2012-04-17 Nikon Corporation Digital camera with feature extraction device
JP5292175B2 (ja) * 2009-05-15 2013-09-18 株式会社エルモ社 撮像装置、焦点調節方法
JP5445150B2 (ja) * 2010-01-12 2014-03-19 株式会社リコー 自動合焦制御装置、電子撮像装置及びデジタルスチルカメラ
CN112312018B (zh) * 2016-04-15 2022-05-17 深圳市大疆创新科技有限公司 使用自适应步长的对比度检测自动聚焦
CN107277348B (zh) * 2017-06-16 2019-08-16 Oppo广东移动通信有限公司 对焦方法、装置、计算机可读存储介质和移动终端

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342905A (en) * 1979-08-31 1982-08-03 Nippon Kogaku K.K. Automatic focusing device of a microscope
JPS56116007A (en) * 1980-02-18 1981-09-11 Olympus Optical Co Ltd Automatic focusing controller
JPS56132315A (en) * 1980-03-19 1981-10-16 Fuji Photo Film Co Ltd Automatic focusing method
US4484806A (en) * 1982-04-28 1984-11-27 Matsushita Electric Industrial Co., Ltd. Automatic focussing apparatus
JPS60183876A (ja) * 1984-03-02 1985-09-19 Konishiroku Photo Ind Co Ltd ビデオカメラのオ−トフオ−カス装置
JPS60218613A (ja) * 1984-04-16 1985-11-01 Canon Inc 自動焦点装置
FR2580088B1 (es) * 1985-04-05 1987-05-15 Trt Telecom Radio Electr
JPS62146628A (ja) 1985-12-20 1987-06-30 Umimoto Shoten:Kk 多色印刷装置
JPS62269913A (ja) * 1987-04-24 1987-11-24 Minolta Camera Co Ltd 自動焦点調節装置

Also Published As

Publication number Publication date
EP0331502A2 (en) 1989-09-06
DE68922872T2 (de) 1995-10-19
EP0331502A3 (en) 1990-02-21
US5005086A (en) 1991-04-02
EP0331502B1 (en) 1995-05-31
DE68922872D1 (de) 1995-07-06

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