GB2442257A - Spatially variable pixel gain - Google Patents

Spatially variable pixel gain Download PDF

Info

Publication number
GB2442257A
GB2442257A GB0619284A GB0619284A GB2442257A GB 2442257 A GB2442257 A GB 2442257A GB 0619284 A GB0619284 A GB 0619284A GB 0619284 A GB0619284 A GB 0619284A GB 2442257 A GB2442257 A GB 2442257A
Authority
GB
United Kingdom
Prior art keywords
gain
image
iso
iso value
image processing
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.)
Withdrawn
Application number
GB0619284A
Other languages
English (en)
Other versions
GB0619284D0 (en
Inventor
Vyacheslav Chesnokov
Vladimir Dolzhenko
Konstantin Gorokhovskiy
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.)
Apical Ltd
Original Assignee
Apical Ltd
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 Apical Ltd filed Critical Apical Ltd
Priority to GB0619284A priority Critical patent/GB2442257A/en
Publication of GB0619284D0 publication Critical patent/GB0619284D0/en
Priority to PCT/EP2007/060396 priority patent/WO2008037812A2/fr
Publication of GB2442257A publication Critical patent/GB2442257A/en
Withdrawn legal-status Critical Current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
    • G06T5/92—Dynamic range modification of images or parts thereof based on global image properties
    • 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
    • H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/14—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices
    • H04N3/15—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices for picture signal generation
    • H04N3/155—Control of the image-sensor operation, e.g. image processing within the image-sensor
    • H04N5/243—

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
GB0619284A 2006-09-29 2006-09-29 Spatially variable pixel gain Withdrawn GB2442257A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0619284A GB2442257A (en) 2006-09-29 2006-09-29 Spatially variable pixel gain
PCT/EP2007/060396 WO2008037812A2 (fr) 2006-09-29 2007-10-01 Procédé et dispositif d'amélioration d'image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0619284A GB2442257A (en) 2006-09-29 2006-09-29 Spatially variable pixel gain

Publications (2)

Publication Number Publication Date
GB0619284D0 GB0619284D0 (en) 2006-11-08
GB2442257A true GB2442257A (en) 2008-04-02

Family

ID=37434958

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0619284A Withdrawn GB2442257A (en) 2006-09-29 2006-09-29 Spatially variable pixel gain

Country Status (2)

Country Link
GB (1) GB2442257A (fr)
WO (1) WO2008037812A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216987A3 (fr) * 2009-02-06 2010-09-01 Canon Kabushiki Kaisha Appareil de capture d'images et son procédé de commande correspondant
US9077905B2 (en) 2009-02-06 2015-07-07 Canon Kabushiki Kaisha Image capturing apparatus and control method thereof
EP3442218A1 (fr) * 2017-08-09 2019-02-13 Canon Kabushiki Kaisha Appareil de traitement d'images pour produire des images avec des caracteristiques entree/sortie différentes pour des régions d'image différentes et des informations relatives aux régions, appareil client pour recevoir des images avec des caracteristiques entree/sortie différentes pour des régions d'image différentes et des informations relatives aux régions et pour afficher les régions dans une manière reconnaisable

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030146986A1 (en) * 2002-02-01 2003-08-07 Calderwood Richard C. Digital camera with ISO pickup sensitivity adjustment
US20060158532A1 (en) * 2005-01-19 2006-07-20 Fuji Photo Film Co., Ltd. Image capturing apparatus and image capturing method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5991456A (en) * 1996-05-29 1999-11-23 Science And Technology Corporation Method of improving a digital image
US6137533A (en) * 1997-05-14 2000-10-24 Cirrus Logic, Inc. System and method for enhancing dynamic range in images
GB0110748D0 (en) * 2001-05-02 2001-06-27 Apical Ltd Image enhancement methods and apparatus therefor
JP3880553B2 (ja) * 2003-07-31 2007-02-14 キヤノン株式会社 画像処理方法および装置
KR100555755B1 (ko) * 2004-05-04 2006-03-03 삼성전자주식회사 휘도 히스토그램을 이용한 영상 자동 보정 장치
US7599578B2 (en) * 2004-09-17 2009-10-06 Nikon Corporation Apparatus, program, and method for image tone transformation, and electronic camera
US7489831B2 (en) * 2005-02-11 2009-02-10 Samsung Electronics Co., Ltd. Method and apparatus for darker region details using image global information

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030146986A1 (en) * 2002-02-01 2003-08-07 Calderwood Richard C. Digital camera with ISO pickup sensitivity adjustment
US20060158532A1 (en) * 2005-01-19 2006-07-20 Fuji Photo Film Co., Ltd. Image capturing apparatus and image capturing method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216987A3 (fr) * 2009-02-06 2010-09-01 Canon Kabushiki Kaisha Appareil de capture d'images et son procédé de commande correspondant
US8355059B2 (en) 2009-02-06 2013-01-15 Canon Kabushiki Kaisha Image capturing apparatus and control method thereof
US9077905B2 (en) 2009-02-06 2015-07-07 Canon Kabushiki Kaisha Image capturing apparatus and control method thereof
EP3442218A1 (fr) * 2017-08-09 2019-02-13 Canon Kabushiki Kaisha Appareil de traitement d'images pour produire des images avec des caracteristiques entree/sortie différentes pour des régions d'image différentes et des informations relatives aux régions, appareil client pour recevoir des images avec des caracteristiques entree/sortie différentes pour des régions d'image différentes et des informations relatives aux régions et pour afficher les régions dans une manière reconnaisable

Also Published As

Publication number Publication date
WO2008037812A3 (fr) 2008-05-15
WO2008037812A2 (fr) 2008-04-03
GB0619284D0 (en) 2006-11-08

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)