FR2655502B1 - Processeur de traitement d'images avec compensation de variations de l'eclairement et procede pour executer une telle compensation. - Google Patents

Processeur de traitement d'images avec compensation de variations de l'eclairement et procede pour executer une telle compensation.

Info

Publication number
FR2655502B1
FR2655502B1 FR9014752A FR9014752A FR2655502B1 FR 2655502 B1 FR2655502 B1 FR 2655502B1 FR 9014752 A FR9014752 A FR 9014752A FR 9014752 A FR9014752 A FR 9014752A FR 2655502 B1 FR2655502 B1 FR 2655502B1
Authority
FR
France
Prior art keywords
signal level
image
compensation
background
signal
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 - Fee Related
Application number
FR9014752A
Other languages
English (en)
Other versions
FR2655502A1 (fr
Inventor
David W Farchmin
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.)
Allen Bradley Co LLC
Original Assignee
Allen Bradley Co LLC
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 Allen Bradley Co LLC filed Critical Allen Bradley Co LLC
Publication of FR2655502A1 publication Critical patent/FR2655502A1/fr
Application granted granted Critical
Publication of FR2655502B1 publication Critical patent/FR2655502B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/90—Dynamic range modification of images or parts thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/11—Region-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/136—Segmentation; Edge detection involving thresholding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/76—Circuitry for compensating brightness variation in the scene by influencing the image signals
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10141—Special mode during image acquisition
    • G06T2207/10152—Varying illumination
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30164—Workpiece; Machine component

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Image Input (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Image Analysis (AREA)
  • Image Processing (AREA)
FR9014752A 1989-12-04 1990-11-26 Processeur de traitement d'images avec compensation de variations de l'eclairement et procede pour executer une telle compensation. Expired - Fee Related FR2655502B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/445,207 US5065443A (en) 1989-12-04 1989-12-04 Image processor with illumination variation compensation

Publications (2)

Publication Number Publication Date
FR2655502A1 FR2655502A1 (fr) 1991-06-07
FR2655502B1 true FR2655502B1 (fr) 1995-02-03

Family

ID=23768001

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9014752A Expired - Fee Related FR2655502B1 (fr) 1989-12-04 1990-11-26 Processeur de traitement d'images avec compensation de variations de l'eclairement et procede pour executer une telle compensation.

Country Status (4)

Country Link
US (1) US5065443A (fr)
JP (1) JP2634317B2 (fr)
DE (1) DE4038220C2 (fr)
FR (1) FR2655502B1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6781624B1 (en) * 1998-07-30 2004-08-24 Canon Kabushiki Kaisha Signal processing apparatus
US6134339A (en) * 1998-09-17 2000-10-17 Eastman Kodak Company Method and apparatus for determining the position of eyes and for correcting eye-defects in a captured frame
DE10334210B4 (de) * 2003-07-26 2008-04-03 Basler Ag Verfahren und Einrichtung zum Ausgleich von Helligkeitsschwankungen bei Digitalkameras
WO2005045775A1 (fr) * 2003-11-07 2005-05-19 Axonx, L.L.C. Procede et dispositif de detection de fumee
CN102109381B (zh) * 2010-11-30 2012-05-23 南京理工大学 微测辐射热计自适应动态范围设计方法

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670100A (en) * 1971-03-29 1972-06-13 Telemation Automatic reference level set for television cameras
US3886305A (en) * 1972-04-24 1975-05-27 Etec Corp Automatic contrast and dark level control for scanning electron microscopes
US3790706A (en) * 1972-05-25 1974-02-05 Boeing Co Automatic video contrast control circuit
AT331318B (de) * 1972-07-05 1976-08-10 Siemens Ag Verfahren und schaltungsanordnung zum unabhangigen regeln der kontrast- und der helligkeitseinstellung eines bildempfangers, insbesondere in bildfernsprech-teilnehmerstellen
US3988776A (en) * 1973-11-30 1976-10-26 Victor Company Of Japan, Limited System for controlling excessive incident light in color television cameras
US4000366A (en) * 1975-03-25 1976-12-28 The United States Of America As Represented By The Secretary Of The Air Force Adaptive gray scale control circuit for television video signals
US4162481A (en) * 1976-12-22 1979-07-24 Recognition Equipment Incorporated Adaptive correlator for video processing
DE2716212A1 (de) * 1977-04-13 1978-10-26 Philips Patentverwaltung Verfahren zum einstellen der grundhelligkeit
JPS53144614A (en) * 1977-05-23 1978-12-16 Jeol Ltd Automatic adjusting device for brightness level
US4231065A (en) * 1979-01-11 1980-10-28 Honeywell Inc. Local area contrast enhancement device
US4216503A (en) * 1979-03-26 1980-08-05 Xerox Corporation Signal restoration and gain control for image viewing devices
JPS56107674A (en) * 1980-01-31 1981-08-26 Sony Corp Gradation correcting device of video signal
FR2520875A1 (fr) * 1982-02-01 1983-08-05 Aerospatiale Procede et dispositif de detection de corps etrangers dans un liquide
FR2629658B1 (fr) * 1982-09-28 1990-10-05 Thomson Csf Circuit d'amelioration du contraste d'une image video, notamment d'une partie de l'image
DE3413651C3 (de) * 1983-04-12 1997-11-20 Canon Kk Bildsignalverarbeitungsgerät
JPS6063475A (ja) * 1983-09-16 1985-04-11 Mitsubishi Electric Corp 画像追尾装置
JPS60124173A (ja) * 1983-12-09 1985-07-03 Canon Inc 画像処理装置
JPS60159637A (ja) * 1984-01-31 1985-08-21 Kirin Brewery Co Ltd 欠陥検出方法および装置
JPS6134447A (ja) * 1984-07-25 1986-02-18 Sumitomo Metal Ind Ltd 連続鋳造スラブ光学探傷装置
JPS6153868A (ja) * 1984-08-24 1986-03-17 Dainippon Screen Mfg Co Ltd 画像走査信号処理におけるキャリブレーション装置
US4628362A (en) * 1985-05-02 1986-12-09 American Dynamics Corporation Combined video AGC and digitizing circuit
US4701612A (en) * 1985-07-19 1987-10-20 Owens-Illinois, Inc. Inspection of container finish
GB8521019D0 (en) * 1985-08-22 1986-10-01 Rank Pullin Controls Ltd Imaging apparatus
JPS6297079A (ja) * 1985-10-24 1987-05-06 Hitachi Ltd ビデオ信号の２値化回路
US4855830A (en) * 1987-03-30 1989-08-08 Allen-Bradley Company, Inc. Machine vision system with illumination variation compensation
JPS63262972A (ja) * 1987-04-20 1988-10-31 Nikon Corp 電子スチルカメラの露出制御装置
AU607033B2 (en) * 1988-01-12 1991-02-21 Sanyo Electric Co., Ltd. Auto iris/gamma correction apparatus for making automatic exposure adjustment and/or automatic gamma correction in response to video signal and image sensing apparatus comprising such auto iris/gamma correction apparatus
JPH01221986A (ja) * 1988-03-01 1989-09-05 Canon Inc 露光制御装置
US4969045A (en) * 1988-05-20 1990-11-06 Sanyo Electric Co., Ltd. Image sensing apparatus having automatic iris function of automatically adjusting exposure in response to video signal
JP2809447B2 (ja) * 1989-01-21 1998-10-08 株式会社リコー 画像処理装置

Also Published As

Publication number Publication date
JPH03190391A (ja) 1991-08-20
DE4038220A1 (de) 1991-06-13
JP2634317B2 (ja) 1997-07-23
DE4038220C2 (de) 2000-01-13
US5065443A (en) 1991-11-12
FR2655502A1 (fr) 1991-06-07

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20100730