CA2064721A1 - Circuit de correction d'images - Google Patents

Circuit de correction d'images

Info

Publication number
CA2064721A1
CA2064721A1 CA2064721A CA2064721A CA2064721A1 CA 2064721 A1 CA2064721 A1 CA 2064721A1 CA 2064721 A CA2064721 A CA 2064721A CA 2064721 A CA2064721 A CA 2064721A CA 2064721 A1 CA2064721 A1 CA 2064721A1
Authority
CA
Canada
Prior art keywords
correction circuit
unit
image correction
correction values
digital
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
CA2064721A
Other languages
English (en)
Other versions
CA2064721C (fr
Inventor
James Scott Houchin
Kenneth Alan Parulski
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.)
Eastman Kodak Co
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2064721A1 publication Critical patent/CA2064721A1/fr
Application granted granted Critical
Publication of CA2064721C publication Critical patent/CA2064721C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/61—Noise processing, e.g. detecting, correcting, reducing or removing noise the noise originating only from the lens unit, e.g. flare, shading, vignetting or "cos4"
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/67—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response
    • H04N25/671—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response for non-uniformity detection or correction
    • H04N25/673—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response for non-uniformity detection or correction by using reference sources

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Heads (AREA)

Abstract

L'invention est un appareil de lecture et de correction d'images comportant un capteur qui reçoit la lumière et la convertit en signaux électriques, une unité de numérisation qui convertit le signal d'imagerie analogique en un signal numérique, une unité d'étalonnage qui saisit des données d'étalonnage pour chaque pixel dans des conditions d'éclairage connu et qui produit des corrections individuelles pour chaque pixel, et une unité de correction constituée d'une table de recherche consultée par le signal d'imagerie numérique et les corrections, qui corrige les données d'imagerie numérique.
CA002064721A 1990-07-31 1991-07-24 Circuit de correction d'images Expired - Fee Related CA2064721C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US561,437 1990-07-31
US07/561,437 US5047861A (en) 1990-07-31 1990-07-31 Method and apparatus for pixel non-uniformity correction

Publications (2)

Publication Number Publication Date
CA2064721A1 true CA2064721A1 (fr) 1992-02-01
CA2064721C CA2064721C (fr) 1997-10-14

Family

ID=24241974

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002064721A Expired - Fee Related CA2064721C (fr) 1990-07-31 1991-07-24 Circuit de correction d'images

Country Status (6)

Country Link
US (1) US5047861A (fr)
EP (1) EP0495045B1 (fr)
JP (1) JPH05501793A (fr)
CA (1) CA2064721C (fr)
DE (1) DE69125472T2 (fr)
WO (1) WO1992003009A1 (fr)

Families Citing this family (140)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113246A (en) * 1985-10-11 1992-05-12 Canon Kabushiki Kaisha Image sensing apparatus for correcting a defect in color signals generated by a CCD
WO1991007844A1 (fr) * 1989-11-15 1991-05-30 Rank Cintel Limited Ameliorations relatives a des analyseurs a spot mobile
JPH03270567A (ja) * 1990-03-20 1991-12-02 Fuji Photo Film Co Ltd 画像信号補正方法
US5191406A (en) * 1990-04-20 1993-03-02 Nikon Corporation Method and apparatus for rapid scanning of color images
JP2924079B2 (ja) * 1990-05-14 1999-07-26 ソニー株式会社 ガンマ補正回路
FR2662283B1 (fr) * 1990-05-15 1992-07-24 Thomson Trt Defense Procede de correction d'images issues de capteur provoquant un bruit periodique, et dispositif de mise en óoeuvre.
CN1021186C (zh) * 1990-09-09 1993-06-09 云南电视机厂 彩色电视设备动态色温状态自动调整法及其调整器
US5185883A (en) * 1990-10-26 1993-02-09 Data Translation, Inc. System for locating failure signals by comparing input data with stored threshold value and storing failure addresses in alternating buffers
JP2864408B2 (ja) * 1990-10-29 1999-03-03 株式会社ニコン 画素信号補正装置
US5265200A (en) * 1990-11-01 1993-11-23 International Business Machines Corporation System and method for automatic image saturation, gamma, and exposure correction in a digitizing video capture system
EP0496573B1 (fr) * 1991-01-24 1995-12-20 Matsushita Electric Industrial Co., Ltd. Circuit pour l'élimination de défauts des éléments d'images pour détecteur d'image en technique état solide
US5157497A (en) * 1991-02-25 1992-10-20 Matsushita Electric Industrial Co., Ltd. Method and apparatus for detecting and compensating for white shading errors in a digitized video signal
US5289286A (en) * 1991-07-18 1994-02-22 Minolta Camera Kabushiki Kaisha Solid state sensor having logarithmic photovoltaic response, with pixel uniformity correction and white balance circuitry therefor
US5196924A (en) * 1991-07-22 1993-03-23 International Business Machines, Corporation Look-up table based gamma and inverse gamma correction for high-resolution frame buffers
US5252818A (en) * 1991-08-22 1993-10-12 Vision Ten, Inc. Method and apparatus for improved scanner accuracy using a linear sensor array
US5162902A (en) * 1991-12-16 1992-11-10 Thomson Consumer Electronics, Inc. Non-linear luminance signal processor responsive to average picture level (APL) of displayed image
US5291293A (en) * 1992-06-01 1994-03-01 Eastman Kodak Company Electronic imaging device with defect correction
US5303056A (en) * 1992-09-14 1994-04-12 Eastman Kodak Company Dynamic gain correction for CRT printing
US5696553A (en) * 1992-09-25 1997-12-09 Bristol-Myers Squibb Co. Remote imager video camera cable compensation circuitry
DE69316569T2 (de) * 1992-12-23 1998-08-20 Eastman Kodak Co Automatischer Abgleich der Kanalverstärkung und -abweichung für Videokameras mit Multikanalsensoren
DE4305251C1 (de) * 1993-02-20 1994-05-05 Eltro Gmbh Verfahren und Schaltungsanordnung zum Verringern der Nichtuniformität von Signalantworten bei einzelnen IR-Detektorelementen
JPH06311441A (ja) * 1993-02-25 1994-11-04 Minolta Camera Co Ltd 固体撮像装置
US5440338A (en) * 1993-05-11 1995-08-08 Spiricon, Inc. Method and apparatus for improving dimensional measurements made with video cameras
JP3014895B2 (ja) * 1993-06-02 2000-02-28 株式会社日立製作所 ビデオカメラ
US5404232A (en) * 1993-10-04 1995-04-04 Xerox Corporation Calibration system for a raster input scanner
EP0660596B1 (fr) * 1993-12-20 1999-02-03 Matsushita Electric Industrial Co., Ltd. Circuit numérique de correction automatique des effets d'ombre pour caméras
JPH07218252A (ja) * 1994-02-09 1995-08-18 Fuji Electric Co Ltd イメージセンサの映像データ回路
US5548332A (en) * 1994-04-18 1996-08-20 Panasonic Technologies, Inc. Apparatus and method for black shading correction
USH1616H (en) * 1994-05-31 1996-12-03 Minnesota Mining And Manufacturing Company Web inspection system having enhanced video signal preprocessing
KR960003298A (ko) * 1994-06-02 1996-01-26 이헌조 캠코더의 촬상관 결점보상 방법 및 장치
US6055329A (en) * 1994-06-09 2000-04-25 Sherikon, Inc. High speed opto-electronic gage and method for gaging
US5455622A (en) * 1994-06-21 1995-10-03 Eastman Kodak Company Signal processing apparatus and method for offset compensation of CCD signals
JPH0865546A (ja) * 1994-08-18 1996-03-08 Fuji Photo Film Co Ltd シェーディング補正係数生成回路およびシェーディング補正係数生成方法
US5452109A (en) * 1994-08-31 1995-09-19 Eastman Kodak Company Digital image signal processing apparatus and method for accumulating blocks of signal data from an imager
US6670640B1 (en) * 1994-09-15 2003-12-30 Semiconductor Energy Laboratory Co., Ltd. Method for producing semiconductor device
ATE517394T1 (de) * 1994-10-25 2011-08-15 United Parcel Service Inc Automatische elektrische kamera für etikettenbildaufnahme
KR100203239B1 (ko) * 1995-02-16 1999-06-15 윤종용 화이트쉐이딩 보정방법 및 장치
DE69625398T2 (de) * 1995-02-24 2003-09-04 Eastman Kodak Co Schwarzmuster-Korrektur für einen Ladungsübertragungssensor
KR0181286B1 (ko) * 1995-03-28 1999-05-01 김광호 Ccd 카메라의 디펙트 보상회로
FR2732850B1 (fr) * 1995-04-07 1997-07-04 Lhesa Electronique Camera a couplage de charge munie de moyens d'elimination de defauts et procede mis en oeuvre par une telle camera
US5539459A (en) * 1995-05-18 1996-07-23 Polaroid Corporation Optimal tone scale mapping in electronic cameras
DE19527148C1 (de) * 1995-07-25 1997-01-09 Siemens Ag Verfahren zum Betrieb eines digitalen Bildsystems einer Röntgendiagnostikeinrichtung
US6002433A (en) * 1995-08-29 1999-12-14 Sanyo Electric Co., Ltd. Defective pixel detecting circuit of a solid state image pick-up device capable of detecting defective pixels with low power consumption and high precision, and image pick-up device having such detecting circuit
US5854655A (en) * 1995-08-29 1998-12-29 Sanyo Electric Co., Ltd. Defective pixel detecting circuit of a solid state image pick-up device capable of detecting defective pixels with low power consumption and high precision, and image pick-up device having such detecting circuit
FR2743144B1 (fr) * 1995-12-28 1998-01-30 Sagem Procede de determination d'une energie lumineuse mesuree par un capteur
US5654755A (en) * 1996-01-05 1997-08-05 Xerox Corporation System for determining a video offset from dark photosensors in an image sensor array
GB2314227B (en) * 1996-06-14 1998-12-23 Simage Oy Calibration method and system for imaging devices
GB2318473B (en) * 1996-10-17 2000-11-29 Sony Corp Solid state imaging device,signal processing method and camera
US5987156A (en) * 1996-11-25 1999-11-16 Lucent Technologies Apparatus for correcting fixed column noise in images acquired by a fingerprint sensor
US6005614A (en) * 1997-03-19 1999-12-21 Eastman Kodak Company Method for calibrating a multi-channel imaging system
US6249315B1 (en) * 1997-03-24 2001-06-19 Jack M. Holm Strategy for pictorial digital image processing
US7304670B1 (en) * 1997-03-28 2007-12-04 Hand Held Products, Inc. Method and apparatus for compensating for fixed pattern noise in an imaging system
US6798452B1 (en) * 1997-07-28 2004-09-28 Matsushita Electric Industrial Co., Ltd. Amplifying solid-state imaging device, method for driving the same and physical quantity distribution sensing semiconductor device
US6240200B1 (en) * 1997-08-29 2001-05-29 Barry M. Wendt Optical fingerprint imager with improved optics
US6529238B1 (en) * 1997-09-05 2003-03-04 Texas Instruments Incorporated Method and apparatus for compensation of point noise in CMOS imagers
US6618084B1 (en) * 1997-11-05 2003-09-09 Stmicroelectronics, Inc. Pixel correction system and method for CMOS imagers
US6330345B1 (en) * 1997-11-17 2001-12-11 Veridicom, Inc. Automatic adjustment processing for sensor devices
US7173656B1 (en) * 1997-12-03 2007-02-06 Intel Corporation Method and apparatus for processing digital pixel output signals
US6941006B1 (en) * 1998-03-05 2005-09-06 Dupont Photomasks, Inc. Method and system for calibrating the scan amplitude of an electron beam lithography instrument
US6400468B1 (en) * 1998-03-31 2002-06-04 International Business Machines Corporation Smoothing calibration files to improve reproduction of digitized images
US6665009B1 (en) * 1998-05-20 2003-12-16 Omnivision Technologies, Inc. On-chip dead pixel correction in a CMOS imaging sensor
US6563536B1 (en) * 1998-05-20 2003-05-13 Intel Corporation Reducing noise in an imaging system
US6642956B1 (en) * 1998-05-29 2003-11-04 Agilent Technologies, Inc. Digital image processor for a digital camera
US6518998B1 (en) * 1998-06-09 2003-02-11 Integra Medical Image quality by automatically changing the black level of a video signal
US6445413B1 (en) * 1998-08-24 2002-09-03 Xerox Corporation System for determining a video offset from dark photosensors in an image sensor array
JP3587433B2 (ja) * 1998-09-08 2004-11-10 シャープ株式会社 固体撮像素子の画素欠陥検出装置
US7268809B2 (en) * 1998-09-23 2007-09-11 San Disk Corporation Analog buffer memory for high-speed digital image capture
US6760068B2 (en) * 1998-12-31 2004-07-06 Sandisk Corporation Correction of corrupted elements in sensors using analog/multi-level non-volatile memory
US6304826B1 (en) * 1999-02-05 2001-10-16 Syscan, Inc. Self-calibration method and circuit architecture of image sensor
US6381357B1 (en) 1999-02-26 2002-04-30 Intel Corporation Hi-speed deterministic approach in detecting defective pixels within an image sensor
US6350985B1 (en) * 1999-04-26 2002-02-26 Direct Radiography Corp. Method for calculating gain correction factors in a digital imaging system
WO2000074391A1 (fr) * 1999-06-02 2000-12-07 Vista Medical Technologies, Inc. Camera dtc interchangeable a fonction de correction des defectuosites integree
JP3632505B2 (ja) * 1999-06-18 2005-03-23 セイコーエプソン株式会社 画像表示装置
US6833862B1 (en) * 1999-06-30 2004-12-21 Logitech, Inc. Image sensor based vignetting correction
US7009644B1 (en) 1999-12-15 2006-03-07 Logitech Europe S.A. Dynamic anomalous pixel detection and correction
US6995794B2 (en) * 1999-06-30 2006-02-07 Logitech Europe S.A. Video camera with major functions implemented in host software
US7428011B1 (en) * 1999-09-02 2008-09-23 Fujifilm Corporation Wide dynamic range electronic image recording and reproducing system
JP2001197369A (ja) * 2000-01-06 2001-07-19 Minolta Co Ltd 固体撮像装置
JP2001275029A (ja) * 2000-03-28 2001-10-05 Minolta Co Ltd デジタルカメラ、その画像信号処理方法及び記録媒体
JP3757747B2 (ja) * 2000-04-03 2006-03-22 株式会社ニコン 電子カメラ、画像処理プログラムを記録した記録媒体、および画像処理方法
DE60125097T8 (de) * 2000-06-08 2007-10-31 Nippon Telegraph And Telephone Corp. Kapatizitives Sensorgerät zur Erkennung kleiner Muster
US6760471B1 (en) * 2000-06-23 2004-07-06 Teradyne, Inc. Compensation system and related techniques for use in a printed circuit board inspection system
JP4497759B2 (ja) * 2000-06-30 2010-07-07 キヤノン株式会社 画像処理装置及びその処理方法
EP1703717A3 (fr) * 2000-08-11 2008-07-30 GretagMacbeth AG Méthode et dispositif pour la mesure colorimétrique d'un document bidimensionnel
DE60027207T2 (de) * 2000-08-18 2006-11-16 Cross Match Technologies, Inc., Palm Beach Gardens System und verfahren zum automatischen steuern eines fingerabdruckabtasters
KR100399884B1 (ko) * 2000-10-25 2003-09-29 주식회사 하이닉스반도체 이미지 센서의 결함 픽셀 보정 장치 및 그 방법
DE10064184C1 (de) * 2000-12-22 2002-04-04 Fraunhofer Ges Forschung Verfahren und Vorrichtung zur Bilderzeugung unter Verwendung mehrerer Belichtungszeiten
JP2002237998A (ja) * 2001-02-07 2002-08-23 Sony Corp 画面補正方法及び撮像装置
US7088388B2 (en) * 2001-02-08 2006-08-08 Eastman Kodak Company Method and apparatus for calibrating a sensor for highlights and for processing highlights
JP4655383B2 (ja) * 2001-02-23 2011-03-23 ソニー株式会社 イメージセンサの画像信号処理装置
JP4485087B2 (ja) * 2001-03-01 2010-06-16 株式会社半導体エネルギー研究所 半導体装置の動作方法
US7164417B2 (en) * 2001-03-26 2007-01-16 Eastman Kodak Company Dynamic controller for active-matrix displays
US7031026B2 (en) * 2001-05-21 2006-04-18 International Business Machines Corporation Defect and maintenance detection for image capture device
JP2003032709A (ja) * 2001-07-12 2003-01-31 Mitsubishi Electric Corp 半導体撮像装置
AU2002317219A1 (en) * 2001-07-12 2003-01-29 Do Labs Method and system for modifying a digital image taking into account its noise
US6778290B2 (en) 2001-08-23 2004-08-17 Eastman Kodak Company Printing image frames corresponding to motion pictures
JP2003087653A (ja) * 2001-09-06 2003-03-20 Ricoh Co Ltd 撮像装置
US7233350B2 (en) * 2002-01-05 2007-06-19 Candela Microsystems, Inc. Image sensor with interleaved image output
DE10205691A1 (de) * 2002-02-04 2003-08-14 Pilz Gmbh & Co Verfahren zum Überprüfen der Funktonssicherheit eines Bildsensors sowie Vorrichtung mit einem Bildsensor
US7064785B2 (en) * 2002-02-07 2006-06-20 Eastman Kodak Company Apparatus and method of correcting for dark current in a solid state image sensor
JP2003284707A (ja) * 2002-03-27 2003-10-07 Canon Inc 撮影装置、ゲイン補正方法、記録媒体及びプログラム
JP3934506B2 (ja) * 2002-08-06 2007-06-20 オリンパス株式会社 撮像システムおよび画像処理プログラム
US7408576B2 (en) * 2002-08-16 2008-08-05 Zoran Corporation Techniques for modifying image field data as a function of radius across the image field
US7388610B2 (en) * 2002-08-16 2008-06-17 Zoran Corporation Techniques of modifying image field data by extrapolation
US7391450B2 (en) 2002-08-16 2008-06-24 Zoran Corporation Techniques for modifying image field data
DE10239994B4 (de) * 2002-08-27 2006-12-14 Robert Bosch Gmbh Verfahren zur Korrektur von Ungleichmäßigkeiten eines Bildsensorsystems
US7443431B2 (en) 2002-09-13 2008-10-28 Eastman Kodak Company Fixed pattern noise removal in CMOS imagers across various operational conditions
EP1429542A1 (fr) * 2002-12-11 2004-06-16 Dialog Semiconductor GmbH Compensation de bruit d'un motif fixe avec exigence réduite de mémoires
EP1447977A1 (fr) * 2003-02-12 2004-08-18 Dialog Semiconductor GmbH Compensation du vignettage
US7015960B2 (en) * 2003-03-18 2006-03-21 Candela Microsystems, Inc. Image sensor that uses a temperature sensor to compensate for dark current
US7372484B2 (en) * 2003-06-26 2008-05-13 Micron Technology, Inc. Method and apparatus for reducing effects of dark current and defective pixels in an imaging device
DE10343496B4 (de) * 2003-09-19 2015-08-06 Siemens Aktiengesellschaft Korrektur eines von einem digitalen Röntgendetektor aufgenommenen Röntgenbildes sowie Kalibrierung des Röntgendetektors
US7657116B2 (en) * 2003-10-08 2010-02-02 Canon Kabushiki Kaisha Correction method of defective pixel in image pickup device and image processing apparatus using the correction method
US20050280721A1 (en) * 2004-06-18 2005-12-22 Van Der Heide Auke Method for providing combined gain compensation and error correction of a camera pickup array and an apparatus for implementing the method
US7045756B2 (en) * 2004-08-05 2006-05-16 Applera Corporation Methods and systems for in situ calibration of imaging in biological analysis
US7961973B2 (en) * 2004-09-02 2011-06-14 Qualcomm Incorporated Lens roll-off correction method and apparatus
WO2006085464A1 (fr) * 2005-02-10 2006-08-17 Konica Minolta Holdings, Inc. Dispositif d’imagerie
EP1938581A4 (fr) * 2005-09-28 2011-10-19 Nokia Corp Stockage interne de caracteristiques de camera lors de la production
US7471319B2 (en) * 2005-10-28 2008-12-30 Hewlett-Packard Development Company, L.P. Lens and CCD correction using singular value decomposition
US20070153080A1 (en) * 2005-12-29 2007-07-05 Eastman Kodak Company High-speed continuous film writer
DE102006031757A1 (de) * 2006-01-04 2007-08-02 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Verfahren zur automatischen Korrektur von Bildfehlern in Video-Assist-Bildern eines Video-Assist-Systems
JP4616794B2 (ja) * 2006-05-18 2011-01-19 富士フイルム株式会社 画像データのノイズ低減装置およびその制御方法
US20080252797A1 (en) * 2007-04-13 2008-10-16 Hamer John W Method for input-signal transformation for rgbw displays with variable w color
FR2919962B1 (fr) * 2007-08-10 2009-09-18 Commissariat Energie Atomique Procede de correction de sensibilite et capteur d'image matriciel pour la mise en oeuvre de ce procede
DE102007039021A1 (de) * 2007-08-17 2009-02-26 Vistec Semiconductor Systems Gmbh Verfahren zum reproduzierbaren Bestimmen von Objekteigenschaften
US20100245590A1 (en) * 2007-11-23 2010-09-30 Cazier Robert P Camera sensor system self-calibration
WO2012093963A1 (fr) * 2011-01-04 2012-07-12 Piqx Imaging Pte Ltd Procédé et appareil de numérisation
US8830361B2 (en) 2012-04-12 2014-09-09 Taiwan Semiconductor Manufacturing Company, Ltd. Method of reducing column fixed pattern noise
US9014504B2 (en) * 2012-05-31 2015-04-21 Apple Inc. Systems and methods for highlight recovery in an image signal processor
CN103310528B (zh) * 2013-07-08 2016-08-17 广州广电运通金融电子股份有限公司 图像补偿修正方法及识别验钞装置
FR3009388B1 (fr) 2013-07-30 2015-07-17 Ulis Diagnostic de l'etat defectueux d'une matrice de detection bolometrique
WO2015069566A1 (fr) * 2013-11-05 2015-05-14 Arizona Board Of Regents For And On Behalf Of Arizona State University Réseau de capteurs de détection adaptatif et procédé de sa mise à disposition et de son utilisation
LU92406B1 (en) * 2014-03-19 2015-09-21 Iee Sarl Camera head with integrated calibration tables
US9473768B2 (en) 2014-09-03 2016-10-18 Raytheon Company Optical non-uniformity correction (NUC) for active mode imaging sensors
US9602744B2 (en) * 2015-08-14 2017-03-21 The United States Of America, As Represented By The Secretary Of The Army Method of detector gain and offset level estimation by means of a variable aperture transmission mechanism
CL2015003495A1 (es) 2015-11-30 2016-07-15 Univ Concepcion Un proceso que permite eliminar el ruido de patrón fijo en imágenes efectivas formadas por arreglos de sensores electromagnéticos de un campo de luz mediante un reenfoque digital.
US20190306447A1 (en) * 2018-03-29 2019-10-03 Analog Devices Global Unlimited Company Lookup table
EP4111681A4 (fr) * 2020-02-26 2023-12-13 Shenzhen Xpectvision Technology Co., Ltd. Systèmes d'imagerie et leurs procédés de fonctionnement
CN111436963B (zh) * 2020-06-17 2020-09-15 南京安科医疗科技有限公司 一种头部移动ct探测器的自校准方法及扫描系统
FR3137241B1 (fr) * 2022-06-23 2024-06-21 Bertin Tech Procédés de détermination d’informations de calibration et d’élaboration d’images pour un capteur d’images, et capteur d’images

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216503A (en) * 1979-03-26 1980-08-05 Xerox Corporation Signal restoration and gain control for image viewing devices
US4745466A (en) * 1983-03-06 1988-05-17 Canon Kabushiki Kaisha Digital color image processing apparatus with color masking processing unit addressed by a plurality of multi-bit color component signals using various combinations of the bits of the signals
US4602291A (en) * 1984-05-09 1986-07-22 Xerox Corporation Pixel non-uniformity correction system
US4736245A (en) * 1984-12-12 1988-04-05 Fuji Photo Film Co., Ltd. Calibration method for color film inspection system
IT1183816B (it) * 1985-05-03 1987-10-22 Olivetti & Co Spa Dispositivo di lettura digitale di documenti per apparecchiature di trasmissioni e o riproduzione di immagini con compensazione in ampiezza dei segnali di lettura
US4698685A (en) * 1986-05-28 1987-10-06 Rca Corporation Apparatus and method for correcting CCD pixel nonuniformities
JPS6361239A (ja) * 1986-09-01 1988-03-17 Fuji Photo Film Co Ltd カラ−フイルム検定装置のオフセツトドリフト補正方法
JPH0722311B2 (ja) * 1986-11-13 1995-03-08 キヤノン株式会社 カラ−画像読み取り装置
JPS63232579A (ja) * 1987-03-19 1988-09-28 Mitsubishi Electric Corp 固体撮像装置
GB2203612B (en) * 1987-04-10 1991-04-24 Gec Avionics Scanning imager
US4839866A (en) * 1987-05-29 1989-06-13 Texas Instruments Incorporated Cascadable first-in, first-out memory
GB8722228D0 (en) * 1987-09-22 1987-10-28 Crosfield Electronics Ltd Image processing
US4920428A (en) * 1988-07-08 1990-04-24 Xerox Corporation Offset, gain and bad pixel correction in electronic scanning arrays
US4912558A (en) * 1988-12-27 1990-03-27 Eastman Kodak Company Optical image to video transfer system having enhanced resolution and contrast for dark areas of the image

Also Published As

Publication number Publication date
US5047861A (en) 1991-09-10
EP0495045A1 (fr) 1992-07-22
EP0495045B1 (fr) 1997-04-02
JPH05501793A (ja) 1993-04-02
WO1992003009A1 (fr) 1992-02-20
DE69125472D1 (de) 1997-05-07
CA2064721C (fr) 1997-10-14
DE69125472T2 (de) 1997-11-06

Similar Documents

Publication Publication Date Title
CA2064721A1 (fr) Circuit de correction d'images
KR940023264A (ko) 화상 보정장치
US4907084A (en) Image reading unit with black level control
MY118136A (en) Image quality correction circuit for video signals
KR880010614A (ko) 콘버젼스장치
WO1997023090A3 (fr) Equipement radiographique d'examen, comportant une matrice de capteurs d'image, a unite de correction
MY128231A (en) Image processing for correcting defects of read image.
CA2038096A1 (fr) Dispositif d'elimination du courant d'ombrage et de correction de pixels
EP0821519A3 (fr) Circuit de correction de distorsion
EP0579838A4 (fr)
EP1326428A3 (fr) Appareil de prise d'images
CA2043325A1 (fr) Dispositif de correction du contraste
CA2034223A1 (fr) Appareil de traitement de donnees d'imagerie
EP0379700A3 (fr) Compensation d'exposition pour caméra à balayage par ligne
US5126860A (en) Optical reading apparatus
KR930022893A (ko) 칼러 비디오 카메라 장치
EP0793382A4 (fr) Circuit de correction de taches d'obscurite
EP0274383A3 (fr) Procédé et appareil pour corriger l'erreur de position de lecture dans la direction d'analyse auxiliaire d'un capteur de ligne d'image
WO1999003265A3 (fr) Appareil permettant de capter des images et appareil de radiographie comportant un systeme de correction
EP1079602A3 (fr) Appareil d'entrée d'image
CA2016429A1 (fr) Lecteur
EP0197251A3 (fr) Dispositif de correction d'inégalité de quantité de lumière dans un système de reproduction optique
JPS6437178A (en) Digital video camera
EP0453932A3 (en) Lens arrangement for signal lamp, free of image phantoms
JPS64865A (en) Picture signal correcting circuit

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20080724