FR2875041A1 - METHOD FOR STANDARDIZING AND ENHANCING CONTRAST IN AN IMAGE DELIVERED BY A SENSOR - Google Patents

METHOD FOR STANDARDIZING AND ENHANCING CONTRAST IN AN IMAGE DELIVERED BY A SENSOR

Info

Publication number
FR2875041A1
FR2875041A1 FR0409361A FR0409361A FR2875041A1 FR 2875041 A1 FR2875041 A1 FR 2875041A1 FR 0409361 A FR0409361 A FR 0409361A FR 0409361 A FR0409361 A FR 0409361A FR 2875041 A1 FR2875041 A1 FR 2875041A1
Authority
FR
France
Prior art keywords
sensor
standardizing
image
level
image delivered
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
FR0409361A
Other languages
French (fr)
Other versions
FR2875041B1 (en
Inventor
Romain Delattre
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.)
Thales SA
Original Assignee
Thales SA
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 Thales SA filed Critical Thales SA
Priority to FR0409361A priority Critical patent/FR2875041B1/en
Priority to PCT/EP2005/054345 priority patent/WO2006024670A1/en
Publication of FR2875041A1 publication Critical patent/FR2875041A1/en
Application granted granted Critical
Publication of FR2875041B1 publication Critical patent/FR2875041B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/40—Image enhancement or restoration using histogram techniques
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

Dans un procédé de normalisation et d'amélioration de contraste dans une image délivrée par un senseur dans laquelle le niveau de chaque pixel est codé sur p bits, à un support de visualisation ou d'enregistrement, sur lequel le niveau de chaque pixel est codé sur q bits, avec q<p, l'image à traiter {x} est découpée en blocs (Br), et l'algorithme (NAC) de production d'une table de correspondance de niveaux sur ladite image pour produire une table de correspondance de niveaux (LUT) est appliqué sur chacun des blocs.In a method for normalizing and improving contrast in an image delivered by a sensor in which the level of each pixel is encoded on p bits, to a display or recording medium, on which the level of each pixel is encoded on q bits, with q <p, the image to be processed {x} is cut into blocks (Br), and the algorithm (NAC) for producing a level correspondence table on said image to produce a table of level matching (LUT) is applied on each of the blocks.

FR0409361A 2004-09-03 2004-09-03 METHOD FOR STANDARDIZING AND ENHANCING CONTRAST IN AN IMAGE DELIVERED BY A SENSOR Expired - Fee Related FR2875041B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR0409361A FR2875041B1 (en) 2004-09-03 2004-09-03 METHOD FOR STANDARDIZING AND ENHANCING CONTRAST IN AN IMAGE DELIVERED BY A SENSOR
PCT/EP2005/054345 WO2006024670A1 (en) 2004-09-03 2005-09-02 Method for normalizing and enhancing contrast in an image delivered by a sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0409361A FR2875041B1 (en) 2004-09-03 2004-09-03 METHOD FOR STANDARDIZING AND ENHANCING CONTRAST IN AN IMAGE DELIVERED BY A SENSOR

Publications (2)

Publication Number Publication Date
FR2875041A1 true FR2875041A1 (en) 2006-03-10
FR2875041B1 FR2875041B1 (en) 2007-01-26

Family

ID=34950853

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0409361A Expired - Fee Related FR2875041B1 (en) 2004-09-03 2004-09-03 METHOD FOR STANDARDIZING AND ENHANCING CONTRAST IN AN IMAGE DELIVERED BY A SENSOR

Country Status (2)

Country Link
FR (1) FR2875041B1 (en)
WO (1) WO2006024670A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011101662A1 (en) * 2010-02-16 2011-08-25 Im-Sense Ltd Method and system for generating enhanced images
CN104025152A (en) * 2011-12-29 2014-09-03 英特尔公司 Simplification of local contrast compensation by using weighted look-up table

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001026054A2 (en) * 1999-10-01 2001-04-12 Microsoft Corporation Locally adapted histogram equalization

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001026054A2 (en) * 1999-10-01 2001-04-12 Microsoft Corporation Locally adapted histogram equalization

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KIM J-Y ET AL: "AN ADVANCED CONTRAST ENHANCEMENT USING PARTIALLY OVERLAPPED SUB-BLOCK HISTOGRAM EQUALIZATION", IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, IEEE INC. NEW YORK, US, vol. 11, no. 4, April 2001 (2001-04-01), pages 475 - 484, XP001093567, ISSN: 1051-8215 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011101662A1 (en) * 2010-02-16 2011-08-25 Im-Sense Ltd Method and system for generating enhanced images
US9129403B2 (en) 2010-02-16 2015-09-08 Apple Inc. Method and system for generating enhanced images
CN104025152A (en) * 2011-12-29 2014-09-03 英特尔公司 Simplification of local contrast compensation by using weighted look-up table
EP2807627A4 (en) * 2011-12-29 2015-12-09 Intel Corp Simplification of local contrast compensation by using weighted look-up table
CN104025152B (en) * 2011-12-29 2017-12-26 英特尔公司 By using simplification of the look-up table of weighting to local contrast compensation

Also Published As

Publication number Publication date
FR2875041B1 (en) 2007-01-26
WO2006024670A1 (en) 2006-03-09

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Legal Events

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Effective date: 20080531