ES2188862T3 - Procedimiento y circuito para la mejora de imagenes mediante ecualizacion de histogramas de medias cuantificadas independientes. - Google Patents

Procedimiento y circuito para la mejora de imagenes mediante ecualizacion de histogramas de medias cuantificadas independientes.

Info

Publication number
ES2188862T3
ES2188862T3 ES97301506T ES97301506T ES2188862T3 ES 2188862 T3 ES2188862 T3 ES 2188862T3 ES 97301506 T ES97301506 T ES 97301506T ES 97301506 T ES97301506 T ES 97301506T ES 2188862 T3 ES2188862 T3 ES 2188862T3
Authority
ES
Spain
Prior art keywords
quantified
image
equalization
subimagen
density function
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 - Lifetime
Application number
ES97301506T
Other languages
English (en)
Inventor
Young-Taek Kim
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Application granted granted Critical
Publication of ES2188862T3 publication Critical patent/ES2188862T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/20—Image enhancement or restoration using local operators
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20021—Dividing image into blocks, subimages or windows

Landscapes

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

Abstract

SE PRESENTA UN METODO DE ECUALIZACION DE HISTOGRAMAS PARA MEJORAR UNA IMAGEN QUE INCLUYE LOS PASOS DE: LA CUANTIFICACION DEL NIVEL DE LAS SEÑALES DE LA IMAGEN DE ENTRADA; LA CUANTIFICACION DE UN NIVEL MEDIO DE LAS SEÑALES DE LA IMAGEN DE ENTRADA CUANTIFICADAS POR UNA UNIDAD DE IMAGEN; LA DIVISION DE LAS SEÑALES CUANTIFICADAS DE LA IMAGEN DE ENTRADA EN UN NUMERO PREDETERMINADO DE SUBIMAGENES CUANTIFICADAS DE ACUERDO CON UN NIVEL MEDIO CUANTIFICADO; EL CALCULO DE UN VALOR DE FUNCION DE DENSIDAD ACUMULATIVO DE CADA SUBIMAGEN CUANTIFICADA; LA INTERPOLACION DEL VALOR ACUMULATIVO DE LA FUNCION DE DENSIDAD DE CADA SUBIMAGEN DE ACUERDO CON LAS SEÑALES DE ENTRADA DE IMAGEN Y DEL VALOR ACUMULATIVO DE LA FUNCION DE DENSIDAD DE CADA SUBIMAGEN CUANTIFICADA; Y LA ECUALIZACION INDEPENDIENTEMENTE POR HISTOGRAMA DE LA SUBIMAGENES DE ACUERDO CON EL VALOR ACUMULATIVO, INTERPOLADO DE LA FUNCION DE DENSIDAD DE CADA SUBIMAGEN, PARA MEJORAR DE ESTA FORMA EL CONTRASTE Y CONSERVAR EL BRILLO COMPLETO DE UNA IMAGEN DADA ASI COMO PARA SIMPLIFICAR LOS COMPONENTES DEL CIRCUITO.
ES97301506T 1996-03-09 1997-03-06 Procedimiento y circuito para la mejora de imagenes mediante ecualizacion de histogramas de medias cuantificadas independientes. Expired - Lifetime ES2188862T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960006220A KR100207660B1 (ko) 1996-03-09 1996-03-09 양자화된 평균 분리 히스토그램 등화를 이용한 화질 개선 방법 및 그 회로

Publications (1)

Publication Number Publication Date
ES2188862T3 true ES2188862T3 (es) 2003-07-01

Family

ID=19452708

Family Applications (1)

Application Number Title Priority Date Filing Date
ES97301506T Expired - Lifetime ES2188862T3 (es) 1996-03-09 1997-03-06 Procedimiento y circuito para la mejora de imagenes mediante ecualizacion de histogramas de medias cuantificadas independientes.

Country Status (7)

Country Link
US (1) US5857033A (es)
EP (1) EP0794513B1 (es)
JP (1) JP2858742B2 (es)
KR (1) KR100207660B1 (es)
CN (1) CN1124568C (es)
DE (1) DE69717517T2 (es)
ES (1) ES2188862T3 (es)

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US20050261763A1 (en) * 2003-04-08 2005-11-24 Xingwu Wang Medical device
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US20070027532A1 (en) * 2003-12-22 2007-02-01 Xingwu Wang Medical device
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US8947465B2 (en) * 2004-12-02 2015-02-03 Sharp Laboratories Of America, Inc. Methods and systems for display-mode-dependent brightness preservation
US7782405B2 (en) * 2004-12-02 2010-08-24 Sharp Laboratories Of America, Inc. Systems and methods for selecting a display source light illumination level
US8913089B2 (en) * 2005-06-15 2014-12-16 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with frequency-specific gain
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US7982707B2 (en) * 2004-12-02 2011-07-19 Sharp Laboratories Of America, Inc. Methods and systems for generating and applying image tone scale adjustments
US7515160B2 (en) * 2006-07-28 2009-04-07 Sharp Laboratories Of America, Inc. Systems and methods for color preservation with image tone scale corrections
US8922594B2 (en) * 2005-06-15 2014-12-30 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with high frequency contrast enhancement
US8111265B2 (en) * 2004-12-02 2012-02-07 Sharp Laboratories Of America, Inc. Systems and methods for brightness preservation using a smoothed gain image
US8120570B2 (en) 2004-12-02 2012-02-21 Sharp Laboratories Of America, Inc. Systems and methods for tone curve generation, selection and application
US7924261B2 (en) * 2004-12-02 2011-04-12 Sharp Laboratories Of America, Inc. Methods and systems for determining a display light source adjustment
US7800577B2 (en) * 2004-12-02 2010-09-21 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics
US7961199B2 (en) * 2004-12-02 2011-06-14 Sharp Laboratories Of America, Inc. Methods and systems for image-specific tone scale adjustment and light-source control
US8004511B2 (en) * 2004-12-02 2011-08-23 Sharp Laboratories Of America, Inc. Systems and methods for distortion-related source light management
US8295596B1 (en) 2005-12-07 2012-10-23 Marvell International Ltd. Adaptive histogram-based video contrast enhancement
US7839406B2 (en) * 2006-03-08 2010-11-23 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with ambient illumination input
KR100809347B1 (ko) * 2006-07-31 2008-03-05 삼성전자주식회사 쉐도우 영역 보상 방법 및 장치
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CN102288945B (zh) * 2011-05-11 2012-11-28 成都成电电子信息技术工程有限公司 一种船用雷达图像增强方法
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Also Published As

Publication number Publication date
US5857033A (en) 1999-01-05
EP0794513B1 (en) 2002-12-04
JP2858742B2 (ja) 1999-02-17
DE69717517D1 (de) 2003-01-16
KR100207660B1 (ko) 1999-07-15
JPH103538A (ja) 1998-01-06
EP0794513A1 (en) 1997-09-10
CN1124568C (zh) 2003-10-15
CN1164803A (zh) 1997-11-12
KR970068620A (ko) 1997-10-13
DE69717517T2 (de) 2003-04-24

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