CA2078638A1 - Distance measuring method and a distance measuring apparatus - Google Patents

Distance measuring method and a distance measuring apparatus

Info

Publication number
CA2078638A1
CA2078638A1 CA2078638A CA2078638A CA2078638A1 CA 2078638 A1 CA2078638 A1 CA 2078638A1 CA 2078638 A CA2078638 A CA 2078638A CA 2078638 A CA2078638 A CA 2078638A CA 2078638 A1 CA2078638 A1 CA 2078638A1
Authority
CA
Canada
Prior art keywords
image
lens
distance measuring
distance
images
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
CA2078638A
Other languages
French (fr)
Other versions
CA2078638C (en
Inventor
Shigeru Sasaki
Takashi Toriu
Yoshiyuki Ohta
Masaki Watanabe
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.)
Fujitsu Ltd
Original Assignee
Shigeru Sasaki
Takashi Toriu
Yoshiyuki Ohta
Masaki Watanabe
Fujitsu Limited
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 Shigeru Sasaki, Takashi Toriu, Yoshiyuki Ohta, Masaki Watanabe, Fujitsu Limited filed Critical Shigeru Sasaki
Publication of CA2078638A1 publication Critical patent/CA2078638A1/en
Application granted granted Critical
Publication of CA2078638C publication Critical patent/CA2078638C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G02B7/365—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals by analysis of the spatial frequency components of the image
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/80—Exterior conditions
    • B60G2400/82—Ground surface
    • B60G2400/823—Obstacle sensing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2401/00—Indexing codes relating to the type of sensors based on the principle of their operation
    • B60G2401/14—Photo or light sensitive means, e.g. Infrared
    • B60G2401/142—Visual Display Camera, e.g. LCD
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/22—Braking, stopping
    • B60G2800/222—Braking, stopping during collision
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/24—Steering, cornering
    • B60G2800/242—Obstacle avoidance manoeuvre

Abstract

A distance data is obtained from an object to a lens by obtaining an image of the object by an image input unit for forming an image of the object through the lens on an image receiving plane. The present method inputs two observed images Is and Is' with different blurs from the image input unit by making a position of the lens, a position of the image receiving plane with regard to the article different by a minute distance .DELTA.z and performs a filtering process by applying filter to the two input observed images Is and Is', thereby providing two output images Fs and Fs' and calculates the distance a up to the object by using two output images Fs and Fs' obtained by the filtering process based on the relation between the two output images Fs and Fs' and radius s of the blur and the distance a from the lens to the object.
CA002078638A 1991-09-20 1992-09-18 Distance measuring method and a distance measuring apparatus Expired - Fee Related CA2078638C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP03241289A JP3110095B2 (en) 1991-09-20 1991-09-20 Distance measuring method and distance measuring device
JP03-241289 1991-09-20

Publications (2)

Publication Number Publication Date
CA2078638A1 true CA2078638A1 (en) 1993-03-21
CA2078638C CA2078638C (en) 2000-01-25

Family

ID=17072055

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002078638A Expired - Fee Related CA2078638C (en) 1991-09-20 1992-09-18 Distance measuring method and a distance measuring apparatus

Country Status (6)

Country Link
US (1) US5576975A (en)
EP (1) EP0533590B1 (en)
JP (1) JP3110095B2 (en)
KR (1) KR970001140B1 (en)
CA (1) CA2078638C (en)
DE (1) DE69208005T2 (en)

Families Citing this family (97)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5910854A (en) 1993-02-26 1999-06-08 Donnelly Corporation Electrochromic polymeric solid films, manufacturing electrochromic devices using such solid films, and processes for making such solid films and devices
US5442167A (en) * 1993-04-16 1995-08-15 Intermec Corporation Method and apparatus for automatic image focusing
DE4413368C1 (en) * 1994-04-19 1995-09-28 Wilfried Donner Method of optical focussing of object image
US5668663A (en) 1994-05-05 1997-09-16 Donnelly Corporation Electrochromic mirrors and devices
US5666569A (en) * 1994-08-25 1997-09-09 Flashpoint Technology, Inc. System and method for detecting and indicating proper focal distance in a fixed lens camera
JPH0887600A (en) * 1994-09-19 1996-04-02 Topcon Corp Edge detection device
US6891563B2 (en) 1996-05-22 2005-05-10 Donnelly Corporation Vehicular vision system
US6326613B1 (en) 1998-01-07 2001-12-04 Donnelly Corporation Vehicle interior mirror assembly adapted for containing a rain sensor
US6172613B1 (en) 1998-02-18 2001-01-09 Donnelly Corporation Rearview mirror assembly incorporating vehicle information display
US6124886A (en) 1997-08-25 2000-09-26 Donnelly Corporation Modular rearview mirror assembly
US8294975B2 (en) 1997-08-25 2012-10-23 Donnelly Corporation Automotive rearview mirror assembly
JPH11102438A (en) * 1997-09-26 1999-04-13 Minolta Co Ltd Distance image generation device and image display device
US6445287B1 (en) 2000-02-28 2002-09-03 Donnelly Corporation Tire inflation assistance monitoring system
US8288711B2 (en) 1998-01-07 2012-10-16 Donnelly Corporation Interior rearview mirror system with forwardly-viewing camera and a control
US6329925B1 (en) 1999-11-24 2001-12-11 Donnelly Corporation Rearview mirror assembly with added feature modular display
US6693517B2 (en) 2000-04-21 2004-02-17 Donnelly Corporation Vehicle mirror assembly communicating wirelessly with vehicle accessories and occupants
US6477464B2 (en) 2000-03-09 2002-11-05 Donnelly Corporation Complete mirror-based global-positioning system (GPS) navigation solution
JP2000146523A (en) * 1998-09-02 2000-05-26 Sony Corp Instrument and method for measuring distance
JP4160683B2 (en) * 1999-03-02 2008-10-01 株式会社東京測器研究所 Strain measurement system
US6683651B1 (en) * 1999-10-28 2004-01-27 Hewlett-Packard Development Company, L.P. Method of automatically adjusting focus in a shutterless digital camera
EP1263626A2 (en) 2000-03-02 2002-12-11 Donnelly Corporation Video mirror systems incorporating an accessory module
US7370983B2 (en) 2000-03-02 2008-05-13 Donnelly Corporation Interior mirror assembly with display
US7167796B2 (en) 2000-03-09 2007-01-23 Donnelly Corporation Vehicle navigation system for use with a telematics system
US7855755B2 (en) 2005-11-01 2010-12-21 Donnelly Corporation Interior rearview mirror assembly with display
US7581859B2 (en) 2005-09-14 2009-09-01 Donnelly Corp. Display device for exterior rearview mirror
US7255451B2 (en) 2002-09-20 2007-08-14 Donnelly Corporation Electro-optic mirror cell
WO2006124682A2 (en) 2005-05-16 2006-11-23 Donnelly Corporation Vehicle mirror assembly with indicia at reflective element
ES2287266T3 (en) 2001-01-23 2007-12-16 Donnelly Corporation IMPROVED VEHICLE LIGHTING SYSTEM.
WO2002067574A2 (en) * 2001-02-16 2002-08-29 Canesta Inc. Technique for removing blurring from a captured image
US6918674B2 (en) 2002-05-03 2005-07-19 Donnelly Corporation Vehicle rearview mirror system
AU2003237424A1 (en) 2002-06-06 2003-12-22 Donnelly Corporation Interior rearview mirror system with compass
US7329013B2 (en) 2002-06-06 2008-02-12 Donnelly Corporation Interior rearview mirror system with compass
WO2004103772A2 (en) 2003-05-19 2004-12-02 Donnelly Corporation Mirror assembly for vehicle
AU2003278863A1 (en) 2002-09-20 2004-04-08 Donnelly Corporation Mirror reflective element assembly
US7310177B2 (en) 2002-09-20 2007-12-18 Donnelly Corporation Electro-optic reflective element assembly
US7446924B2 (en) 2003-10-02 2008-11-04 Donnelly Corporation Mirror reflective element assembly including electronic component
US7308341B2 (en) 2003-10-14 2007-12-11 Donnelly Corporation Vehicle communication system
US7268006B2 (en) 2004-12-30 2007-09-11 E.I. Du Pont De Nemours And Company Electronic device including a guest material within a layer and a process for forming the same
EP2378350B1 (en) 2006-03-09 2013-12-11 Gentex Corporation Vehicle rearview assembly including a high intensity display
US7397540B2 (en) * 2006-08-21 2008-07-08 The Boeing Company Phase diversity ranging sensor
JP2009047735A (en) * 2007-08-13 2009-03-05 Olympus Corp Imaging apparatus and image processing program
JP2009047734A (en) * 2007-08-13 2009-03-05 Olympus Corp Imaging apparatus and image processing program
US8154418B2 (en) 2008-03-31 2012-04-10 Magna Mirrors Of America, Inc. Interior rearview mirror system
JP5199771B2 (en) * 2008-07-25 2013-05-15 株式会社豊田中央研究所 Optical receiver and optical communication system
US9487144B2 (en) 2008-10-16 2016-11-08 Magna Mirrors Of America, Inc. Interior mirror assembly with display
JP5430292B2 (en) * 2009-03-26 2014-02-26 京セラ株式会社 Subject distance measuring device
JP5459768B2 (en) * 2009-10-28 2014-04-02 京セラ株式会社 Subject distance estimation device
JP2012003233A (en) * 2010-05-17 2012-01-05 Sony Corp Image processing device, image processing method and program
JP5576739B2 (en) * 2010-08-04 2014-08-20 オリンパス株式会社 Image processing apparatus, image processing method, imaging apparatus, and program
WO2012017577A1 (en) 2010-08-06 2012-02-09 パナソニック株式会社 Imaging device and imaging method
WO2012147245A1 (en) 2011-04-27 2012-11-01 パナソニック株式会社 Image pick-up device, image pick-up system equipped with image pick-up device, and image pick-up method
JP5358039B1 (en) 2011-11-30 2013-12-04 パナソニック株式会社 Imaging device
JP5681954B2 (en) 2011-11-30 2015-03-11 パナソニックＩｐマネジメント株式会社 Imaging apparatus and imaging system
US9561022B2 (en) 2012-02-27 2017-02-07 Covidien Lp Device and method for optical image correction in metrology systems
US9117277B2 (en) 2012-04-04 2015-08-25 Canon Kabushiki Kaisha Determining a depth map from images of a scene
US8879139B2 (en) 2012-04-24 2014-11-04 Gentex Corporation Display mirror assembly
JP6214183B2 (en) * 2012-05-11 2017-10-18 キヤノン株式会社 Distance measuring device, imaging device, distance measuring method, and program
CN103063138B (en) * 2013-01-24 2016-08-10 惠州Tcl移动通信有限公司 The method of mobile terminal camera Measuring Object size and mobile terminal
JP6403750B2 (en) 2013-03-15 2018-10-10 ジェンテックス コーポレイション Display mirror assembly
CN105452895B (en) * 2013-06-13 2018-12-18 巴斯夫欧洲公司 For being detected optically by the detector of at least one object
EP3049286B1 (en) 2013-09-24 2018-05-09 Gentex Corporation Display mirror assembly
US9511715B2 (en) 2014-01-31 2016-12-06 Gentex Corporation Backlighting assembly for display for reducing cross-hatching
EP3119643B1 (en) 2014-03-21 2018-05-23 Gentex Corporation Tri-modal display mirror assembly
JP5895270B2 (en) * 2014-03-28 2016-03-30 パナソニックＩｐマネジメント株式会社 Imaging device
US9834146B2 (en) 2014-04-01 2017-12-05 Gentex Corporation Automatic display mirror assembly
JP6660931B2 (en) 2014-07-08 2020-03-11 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ Detector for determining the position of at least one object
US9694751B2 (en) 2014-09-19 2017-07-04 Gentex Corporation Rearview assembly
KR101977686B1 (en) 2014-11-07 2019-05-13 젠텍스 코포레이션 Full display mirror actuator
KR101977685B1 (en) 2014-11-13 2019-05-13 젠텍스 코포레이션 Rearview mirror system with a display
WO2016090126A2 (en) 2014-12-03 2016-06-09 Gentex Corporation Display mirror assembly
USD746744S1 (en) 2014-12-05 2016-01-05 Gentex Corporation Rearview device
EP3230841B1 (en) 2014-12-09 2019-07-03 Basf Se Optical detector
US9744907B2 (en) 2014-12-29 2017-08-29 Gentex Corporation Vehicle vision system having adjustable displayed field of view
US9720278B2 (en) 2015-01-22 2017-08-01 Gentex Corporation Low cost optical film stack
EP3251152B1 (en) 2015-01-30 2023-08-16 Trinamix GmbH Detector for an optical detection of at least one object
WO2016172096A1 (en) 2015-04-20 2016-10-27 Gentex Corporation Rearview assembly with applique
WO2016187215A1 (en) 2015-05-18 2016-11-24 Gentex Corporation Full display rearview device
CN107709096B (en) 2015-06-22 2021-08-24 金泰克斯公司 System and method for processing streaming video images to correct for flicker of amplitude modulated light
JP6877418B2 (en) 2015-07-17 2021-05-26 トリナミクス ゲゼルシャフト ミット ベシュレンクテル ハフツング Detector for optically detecting at least one object
KR102539263B1 (en) 2015-09-14 2023-06-05 트리나미엑스 게엠베하 camera recording at least one image of at least one object
USD797627S1 (en) 2015-10-30 2017-09-19 Gentex Corporation Rearview mirror device
EP3368375B1 (en) 2015-10-30 2020-03-04 Gentex Corporation Rearview device
CN108349435B (en) 2015-10-30 2021-06-15 金泰克斯公司 Switching board
USD798207S1 (en) 2015-10-30 2017-09-26 Gentex Corporation Rearview mirror assembly
USD800618S1 (en) 2015-11-02 2017-10-24 Gentex Corporation Toggle paddle for a rear view device
USD845851S1 (en) 2016-03-31 2019-04-16 Gentex Corporation Rearview device
USD817238S1 (en) 2016-04-29 2018-05-08 Gentex Corporation Rearview device
US10025138B2 (en) 2016-06-06 2018-07-17 Gentex Corporation Illuminating display with light gathering structure
US11211513B2 (en) 2016-07-29 2021-12-28 Trinamix Gmbh Optical sensor and detector for an optical detection
CN109923372B (en) 2016-10-25 2021-12-21 特里纳米克斯股份有限公司 Infrared optical detector employing integrated filter
KR102431355B1 (en) 2016-10-25 2022-08-10 트리나미엑스 게엠베하 Detector for optical detection of at least one object
US11860292B2 (en) 2016-11-17 2024-01-02 Trinamix Gmbh Detector and methods for authenticating at least one object
EP3571522B1 (en) 2016-11-17 2023-05-10 trinamiX GmbH Detector for optically detecting at least one object
USD809984S1 (en) 2016-12-07 2018-02-13 Gentex Corporation Rearview assembly
USD854473S1 (en) 2016-12-16 2019-07-23 Gentex Corporation Rearview assembly
EP3562710A4 (en) 2016-12-30 2019-11-13 Gentex Corporation Full display mirror with on-demand spotter view
US10735638B2 (en) 2017-03-17 2020-08-04 Gentex Corporation Dual display reverse camera system

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788201A (en) * 1970-12-14 1974-01-29 F Abell Method for establishing vehicle identification, speed and conditions of visibility
JPS5156627A (en) * 1974-11-13 1976-05-18 Canon Kk Butsutaizosenmeidokenshutsuhoshiki
US4173010A (en) * 1975-05-01 1979-10-30 Hoffmann Anton R Traffic sign and improved system for recording vehicle speed
US4135817A (en) * 1978-03-09 1979-01-23 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Apparatus for measuring an aircraft's speed and height
US4257703A (en) * 1979-03-15 1981-03-24 The Bendix Corporation Collision avoidance using optical pattern growth rate
DE2910875C2 (en) * 1979-03-20 1985-11-14 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Auto-focus procedure
US4433325A (en) * 1980-09-30 1984-02-21 Omron Tateisi Electronics, Co. Optical vehicle detection system
US4495589A (en) * 1982-09-20 1985-01-22 Crane Co. Aircraft ground velocity determination system
US4671650A (en) * 1982-09-20 1987-06-09 Crane Co. (Hydro-Aire Division) Apparatus and method for determining aircraft position and velocity
US4858157A (en) * 1985-03-13 1989-08-15 Tokyo Kogaku Kikai Kabushiki Kaisha Apparatus and method for determining the coordinates of a three-dimensional object
DE3516664A1 (en) * 1985-05-09 1986-11-13 Honeywell Regelsysteme GmbH, 6050 Offenbach OPTICAL ARRANGEMENT FOR PASSIVE DISTANCE DETERMINATION
FI74556C (en) * 1986-04-11 1988-02-08 Valtion Teknillinen FOERFARANDE FOER TREDIMENSIONELL OEVERVAKNING AV ETT MAOLUTRYMME.
JP2543505B2 (en) * 1986-07-22 1996-10-16 安川商事 株式会社 Signal processing device and measuring device using space-time differential method
GB8701288D0 (en) * 1987-01-21 1987-02-25 Waldern J D Perception of computer-generated imagery
US4847772A (en) * 1987-02-17 1989-07-11 Regents Of The University Of Minnesota Vehicle detection through image processing for traffic surveillance and control
JP2570315B2 (en) * 1987-09-01 1997-01-08 アイシン精機株式会社 On-vehicle distance detection device
US5034904A (en) * 1988-01-27 1991-07-23 Storage Technology Corporation Vision system illumination calibration apparatus
IL86202A (en) * 1988-04-27 1992-01-15 Driver Safety Systems Ltd Traffic safety monitoring apparatus
US4969735A (en) * 1989-03-07 1990-11-13 Sperry Marine Inc. Passive range finding apparatus utilizing television sensors
JPH03269315A (en) * 1990-03-20 1991-11-29 Mitsubishi Electric Corp Inter-vehicle distance detector for tracking leading vehicle
JP2646146B2 (en) * 1990-03-28 1997-08-25 三菱電機株式会社 Inter-vehicle distance control device
JP2583641B2 (en) * 1990-05-18 1997-02-19 日産自動車株式会社 Travel control method
JPH0812072B2 (en) * 1990-06-13 1996-02-07 三菱電機株式会社 Distance measuring device
US5161107A (en) * 1990-10-25 1992-11-03 Mestech Creation Corporation Traffic surveillance system
DE69124726T2 (en) * 1990-10-25 1997-07-03 Mitsubishi Electric Corp Distance detection device for a motor vehicle
US5231470A (en) * 1991-09-06 1993-07-27 Koch Stephen K Scanning system for three-dimensional object digitizing
JP3167752B2 (en) * 1991-10-22 2001-05-21 富士重工業株式会社 Vehicle distance detection device
JP2917661B2 (en) * 1992-04-28 1999-07-12 住友電気工業株式会社 Traffic flow measurement processing method and device
FR2695742B1 (en) * 1992-09-15 1994-10-21 Thomson Csf System for calculating at least one vehicle traffic control parameter.

Also Published As

Publication number Publication date
JP3110095B2 (en) 2000-11-20
DE69208005D1 (en) 1996-03-14
EP0533590A3 (en) 1993-05-12
CA2078638C (en) 2000-01-25
EP0533590A2 (en) 1993-03-24
JPH0579838A (en) 1993-03-30
US5576975A (en) 1996-11-19
KR970001140B1 (en) 1997-01-29
DE69208005T2 (en) 1996-06-13
EP0533590B1 (en) 1996-01-31
KR930006434A (en) 1993-04-21

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