FR2435055A1 - Dispositif de detection de foyer - Google Patents

Dispositif de detection de foyer

Info

Publication number
FR2435055A1
FR2435055A1 FR7919469A FR7919469A FR2435055A1 FR 2435055 A1 FR2435055 A1 FR 2435055A1 FR 7919469 A FR7919469 A FR 7919469A FR 7919469 A FR7919469 A FR 7919469A FR 2435055 A1 FR2435055 A1 FR 2435055A1
Authority
FR
France
Prior art keywords
image
signal
brightness variation
focus
circuit
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.)
Granted
Application number
FR7919469A
Other languages
English (en)
Other versions
FR2435055B1 (fr
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.)
Canon Inc
Original Assignee
Canon Inc
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 JP9209978A external-priority patent/JPS5518652A/ja
Priority claimed from JP15037878A external-priority patent/JPS5576311A/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of FR2435055A1 publication Critical patent/FR2435055A1/fr
Application granted granted Critical
Publication of FR2435055B1 publication Critical patent/FR2435055B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

Dispositif de détection de foyer. La présente invention concerne un dispositif pour détecter le foyer par évaluation de la netteté de l'image de l'objet formée par un système optique de formation d'image. Dans ce dispositif, l'image formee par le système optique est balayée par un détecteur d'image constitué d'une pluralité d'éléments transducteurs photo-électriques disposés de façon indépendante et le signal de balayage et d'image ainsi obtenu est transmis à un circuit de détection de variation de luminosité, circuit dans lequel la variation de luminosité entre les deux éléments d'image adjacents de l'image est détectée. La netteté de l'image, c'est-à-dire l'état du foyer du système optique de formation d'image, est détectée sur la base du signal de variation de luminosité fourni par le circuit détecteur de variation de luminosité. Ainsi, la précision de la détection du foyer peut être très améliorée par une transformation non linéaire du signal de variation de luminosité au moyen d'un circuit de transformation non linéaire, c'est-à-dire en donnant des poids différents au signal de variation de luminosité par rapport au niveau du signal. Application aux appareils de photographie
FR7919469A 1978-07-28 1979-07-27 Dispositif de detection de foyer Expired FR2435055B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9209978A JPS5518652A (en) 1978-07-28 1978-07-28 Imaging state detecting system of image
JP15037878A JPS5576311A (en) 1978-12-04 1978-12-04 Focus position detecting system of image

Publications (2)

Publication Number Publication Date
FR2435055A1 true FR2435055A1 (fr) 1980-03-28
FR2435055B1 FR2435055B1 (fr) 1987-06-12

Family

ID=26433579

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7919469A Expired FR2435055B1 (fr) 1978-07-28 1979-07-27 Dispositif de detection de foyer

Country Status (4)

Country Link
US (2) US4470676A (fr)
DE (1) DE2930636A1 (fr)
FR (1) FR2435055B1 (fr)
GB (1) GB2030022B (fr)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5574505A (en) * 1978-11-30 1980-06-05 Canon Inc Focus position detecting system of image
DE3141959A1 (de) * 1980-10-23 1982-06-16 Canon K.K., Tokyo "scharfeinstellungs-ermittlungssystem"
GB2195214B (en) * 1980-12-10 1988-10-26 Emi Ltd Automatic focussing system for an optical system
JPS5836079A (ja) * 1981-08-26 1983-03-02 Canon Inc 光電変換手段の信号蓄積時間制御方式
AU554186B2 (en) * 1981-10-26 1986-08-14 Sony Corporation Apparatus for detecting distance to an object
JPS5891410A (ja) * 1981-11-27 1983-05-31 Olympus Optical Co Ltd 撮像装置の合焦方法
GB2129642B (en) * 1982-11-05 1986-09-10 British Library Board Focus detection
US4561749A (en) * 1983-02-02 1985-12-31 Nippon Kogaku K.K. Focus detection apparatus
US4524390A (en) * 1983-03-07 1985-06-18 Eastman Kodak Company Imaging apparatus
JPS59172614A (ja) * 1983-03-23 1984-09-29 Canon Inc カメラの自動焦点装置
DD217621A1 (de) * 1983-07-20 1985-01-16 Univ Schiller Jena Einrichtung zur fotometrischen strukturorterkennung mit einem fotoempfaengerarray
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
US4608606A (en) * 1984-03-15 1986-08-26 Rca Corporation CCD floating-element output stages providing low reset noise with single sampling
US4766302A (en) * 1984-05-17 1988-08-23 Minolta Camera Kabushiki Kaisha Focus detecting device including means for determining a priority of correlation calculations
JPS6143876A (ja) * 1984-08-08 1986-03-03 Fuji Electric Corp Res & Dev Ltd 撮像装置の合焦検出方法
US4888609A (en) * 1985-01-17 1989-12-19 Minolta Camera Kabushiki Kaisha Automatic focus adjusting apparatus
JPH0727107B2 (ja) * 1985-07-26 1995-03-29 ミノルタ株式会社 相関像比較装置及びそれを用いた焦点検出装置及び測距装置
JPS62188031A (ja) * 1986-02-13 1987-08-17 Csk Corp 焦点整合位置検出方式
US4752831A (en) * 1986-05-20 1988-06-21 Polaroid Corporation Focusing system for camera apparatus
JPH0813097B2 (ja) * 1986-10-08 1996-02-07 キヤノン株式会社 合焦検出装置
JPS63172213A (ja) * 1987-01-12 1988-07-15 Canon Inc 合焦状態判定装置
JPS63172239A (ja) * 1987-01-12 1988-07-15 Canon Inc オートフオーカス装置
US4887125A (en) * 1987-03-05 1989-12-12 Fuji Photo Film Co., Ltd. Method of and device for detecting focusing condition of image incident upon image sensor
JPH0810297B2 (ja) * 1987-07-07 1996-01-31 富士写真フイルム株式会社 位相差検出装置
JPH0754372B2 (ja) * 1987-07-08 1995-06-07 富士写真フイルム株式会社 位相差検出装置
US4814889A (en) * 1987-10-07 1989-03-21 General Electric Company Automatic focussing system
US4843413A (en) * 1988-03-28 1989-06-27 Eastman Kodak Company System which uses threshold counts to achieve automatic focus
JP2725933B2 (ja) * 1992-01-31 1998-03-11 三洋電機株式会社 オートフォーカス装置
JPH07325247A (ja) * 1994-05-31 1995-12-12 Nikon Corp 自動合焦装置
US5848305A (en) * 1996-01-31 1998-12-08 Canon Kabushiki Kaisha Circulating shift register and distance measuring device
EP0817157A3 (fr) * 1996-06-28 1998-08-12 Texas Instruments Incorporated Des dispositifs d'affichage d'images
TW342970U (en) 1997-09-12 1998-10-11 Mustek Systems Inc Adjusting apparatus resolution
JP3757595B2 (ja) * 1998-01-19 2006-03-22 コニカミノルタビジネステクノロジーズ株式会社 画像読取装置
US6693672B1 (en) * 1999-05-20 2004-02-17 Hewlett-Packard Development Company, L.P. Method and apparatus for detecting set of images and selecting most focused image
US6567124B1 (en) * 1999-12-01 2003-05-20 Ball Aerospace & Technologies Corp. Electronic image processing technique for achieving enhanced image detail
JP3605043B2 (ja) * 2001-04-18 2004-12-22 キヤノン株式会社 位置計測装置、露光装置、デバイス製造方法および位置計測方法
EP2501139A3 (fr) * 2005-05-26 2014-01-08 RealD Inc. Compensation fantôme pour projection stéréoscopique améliorée
US9116249B1 (en) * 2012-07-26 2015-08-25 Sandia Corporation Multiple-mode radiation detector
US9918017B2 (en) 2012-09-04 2018-03-13 Duelight Llc Image sensor apparatus and method for obtaining multiple exposures with zero interframe time
WO2016061553A1 (fr) * 2014-10-17 2016-04-21 Silverside Detectors Inc. Détecteur de neutrons fissiles
US10317541B2 (en) 2017-04-14 2019-06-11 Silverside Detectors, Inc. Advanced fissile neutron detection system and method
EP3610302A4 (fr) 2017-04-15 2020-12-02 Silverside Detectors Inc. Détecteurs de neutrons thermiques avancés et procédés associés
JP7199169B2 (ja) 2018-07-05 2023-01-05 キヤノン株式会社 画像処理装置、画像処理方法、及びプログラム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH451552A (fr) * 1965-02-03 1968-05-15 Conductron Corp Appareil de mise au point automatique
US3906219A (en) * 1973-10-09 1975-09-16 Honeywell Inc Focus detecting apparatus
DE2551070A1 (de) * 1974-11-13 1976-05-26 Canon Kk Verfahren zur ermittlung der schaerfe einer objekt-abbildung
US4019049A (en) * 1974-02-08 1977-04-19 Hansrichard Schulz Photoelectric transducing unit and system for detecting the sharpness of the image of object by means of the unit
DE2722804A1 (de) * 1976-05-22 1977-12-08 Asahi Optical Co Ltd Einrichtung zur feststellung des brennpunktes fuer eine einaeugige spiegelreflexkamera

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621136A (en) * 1969-09-10 1971-11-16 Us Navy Automatic optical-focusing system for tv cameras
JPS5443374B2 (fr) * 1972-03-29 1979-12-19
JPS4958826A (fr) * 1972-10-04 1974-06-07
US4047187A (en) * 1974-04-01 1977-09-06 Canon Kabushiki Kaisha System for exposure measurement and/or focus detection by means of image senser
US3930261A (en) * 1974-08-27 1975-12-30 Honeywell Inc Automatic focus apparatus
JPS51141649A (en) * 1975-05-31 1976-12-06 Toshiba Corp Detecting apparatus for focus matching
US4117325A (en) * 1975-08-22 1978-09-26 Ernst Leitz Wetzlar Gmbh Optical objective focus indicator and display
US4083056A (en) * 1975-09-09 1978-04-04 Asahi Kogaku Kogyo Kabushiki Kaisha Focus detecting device for single-lens reflex cameras
US4085320A (en) * 1976-10-07 1978-04-18 Honeywell Inc. Automatic focus system with loss of correlation inhibit
US4301471A (en) * 1976-12-20 1981-11-17 Hughes Aircraft Company Moving target indicator system utilizing charge coupled device
JPS5385454A (en) * 1977-01-06 1978-07-27 Canon Inc Distance detecting method
JPS5391730A (en) * 1977-01-22 1978-08-11 Bell & Howell Japan Automatic focal point adjusting device
JPS53116852A (en) * 1977-03-23 1978-10-12 Olympus Optical Co Ltd Automatic focus adjusting system
JPS53131035A (en) * 1977-04-21 1978-11-15 Bell & Howell Japan Automatic focal point adjusting device
JPS53166637U (fr) * 1977-06-02 1978-12-27
JPS5413330A (en) * 1977-07-01 1979-01-31 Olympus Optical Co Ltd Automatic focus adjusting system
US4247187A (en) * 1977-07-14 1981-01-27 Canon Kabushiki Kaisha Camera having focus detection device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH451552A (fr) * 1965-02-03 1968-05-15 Conductron Corp Appareil de mise au point automatique
US3906219A (en) * 1973-10-09 1975-09-16 Honeywell Inc Focus detecting apparatus
US4019049A (en) * 1974-02-08 1977-04-19 Hansrichard Schulz Photoelectric transducing unit and system for detecting the sharpness of the image of object by means of the unit
DE2551070A1 (de) * 1974-11-13 1976-05-26 Canon Kk Verfahren zur ermittlung der schaerfe einer objekt-abbildung
DE2722804A1 (de) * 1976-05-22 1977-12-08 Asahi Optical Co Ltd Einrichtung zur feststellung des brennpunktes fuer eine einaeugige spiegelreflexkamera

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/ *

Also Published As

Publication number Publication date
FR2435055B1 (fr) 1987-06-12
GB2030022B (en) 1983-12-14
DE2930636A1 (de) 1980-02-07
US4560864A (en) 1985-12-24
GB2030022A (en) 1980-03-26
US4470676A (en) 1984-09-11
DE2930636C2 (fr) 1989-06-22

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