ES2185874T3 - Procedimiento para mejorar la calidad de imagen mediante la ecualizacion de histograma por ajuste a la media y circuito para su realizacion. - Google Patents

Procedimiento para mejorar la calidad de imagen mediante la ecualizacion de histograma por ajuste a la media y circuito para su realizacion.

Info

Publication number
ES2185874T3
ES2185874T3 ES97301507T ES97301507T ES2185874T3 ES 2185874 T3 ES2185874 T3 ES 2185874T3 ES 97301507 T ES97301507 T ES 97301507T ES 97301507 T ES97301507 T ES 97301507T ES 2185874 T3 ES2185874 T3 ES 2185874T3
Authority
ES
Spain
Prior art keywords
level
histogram
equalization
procedure
carrying
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
ES97301507T
Other languages
English (en)
Inventor
Young-Taek Kim
Yong-Hun Cho
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
Priority claimed from KR1019960010783A external-priority patent/KR100213039B1/ko
Priority claimed from KR1019960017211A external-priority patent/KR0176602B1/ko
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Application granted granted Critical
Publication of ES2185874T3 publication Critical patent/ES2185874T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Landscapes

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

Abstract

SE PRESENTA UN METODO DE ECUALIZACION DE HISTOGRAMA PARA MEJORAR UNA SEÑAL DE IMAGEN REPRESENTADA POR UN NUMERO PREDETERMINADO DE NIVELES DE GRISES. EL METODO CALCULA UNA FUNCION DE DENSIDAD ACUMULATIVA Y UN NIVEL MEDIO EN UNA UNIDAD DE UNA IMAGEN, Y MAPEA UNA MUESTRA DE ENTRADA EN UN NUEVO NIVEL DE GRISES MEDIANTE UNA FUNCION DE TRANSFORMADA DEFINIDA POR EL USO DE LA FUNCION DE DENSIDAD ACUMULATIVA Y EL NIVEL MEDIO. EL METODO PUEDE INCLUIR TAMBIEN UN PASO PARA OBTENER UN NIVEL MEDIO COMPENSADO MEDIANTE LA ADICION DE UN NIVEL DE BRILLO MEDIO, DE MANERA QUE LA MUESTRA DE ENTRADA SEA MAPEADA EN EL NIVEL MEDIO COMPENSADO DE ACUERDO CON EL NIVEL MEDIO. DE ESTA FORMA, PUEDE LLEVARSE A CABO UNA COMPENSACION DE BRILLO JUNTO CON UNA MEJORA DEL CONTRASTE DE LA IMAGEN.
ES97301507T 1996-04-10 1997-03-06 Procedimiento para mejorar la calidad de imagen mediante la ecualizacion de histograma por ajuste a la media y circuito para su realizacion. Expired - Lifetime ES2185874T3 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019960010783A KR100213039B1 (ko) 1996-04-10 1996-04-10 평균-매칭 히스토그램 등화를 이용한 화질 개선 방법 및 그 회로
KR1019960017211A KR0176602B1 (ko) 1996-05-21 1996-05-21 밝기보상기능을 가진 평균-매칭 히스토그램 등화를 이용한 화질 개선 방법 및 그 회로

Publications (1)

Publication Number Publication Date
ES2185874T3 true ES2185874T3 (es) 2003-05-01

Family

ID=26631745

Family Applications (1)

Application Number Title Priority Date Filing Date
ES97301507T Expired - Lifetime ES2185874T3 (es) 1996-04-10 1997-03-06 Procedimiento para mejorar la calidad de imagen mediante la ecualizacion de histograma por ajuste a la media y circuito para su realizacion.

Country Status (6)

Country Link
US (1) US5862254A (es)
EP (1) EP0801360B1 (es)
JP (1) JP3130268B2 (es)
CN (1) CN1081370C (es)
DE (1) DE69716803T2 (es)
ES (1) ES2185874T3 (es)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100189922B1 (ko) * 1996-06-20 1999-06-01 윤종용 히스토그램 등화를 이용한 동영상의 콘트라스트개선회로 및 그 방법
KR980003998A (ko) * 1996-06-27 1998-03-30 김광호 제한된 분포의 히스토그램 변환을 이용한 화질 개선방법
JP3280888B2 (ja) * 1996-08-19 2002-05-13 三星電子株式会社 量子化された平均−マッチングヒストグラム等化を用いた画質改善方法及びその回路
KR100200628B1 (ko) * 1996-09-30 1999-06-15 윤종용 화질 개선 회로 및 그 방법
US6018588A (en) * 1996-10-09 2000-01-25 Samsung Electronics Co., Ltd. Image enhancement circuit and method using mean matching/quantized mean matching histogram equalization and color compensation
DE69835290T2 (de) * 1998-11-17 2007-07-19 Koninklijke Kpn N.V. Verfahren und Anordnung zum Ausrichten von Eingangs- und Ausgangsvideobildfolgen zur Messung der Videoqualität
KR100298412B1 (ko) * 1999-05-08 2001-09-26 구자홍 동영상 송수신 시스템에서의 영상신호 밝기 제어장치 및 방법
DE50001023D1 (de) 1999-06-15 2003-02-06 Infineon Technologies Ag Verfahren und schaltungsanordnung zur kontrastverbesserung eines bildes
KR100456987B1 (ko) * 2001-04-10 2004-11-10 가부시키가이샤 히타치세이사쿠쇼 표시 데이터를 표시하기 위한 표시 장치 및 표시 구동 장치
US20020172419A1 (en) * 2001-05-15 2002-11-21 Qian Lin Image enhancement using face detection
DE60130671D1 (de) * 2001-12-24 2007-11-08 St Microelectronics Srl Verfahren zur Kontrastverbesserung in digitalen Farbbildern
KR20040008067A (ko) * 2002-07-15 2004-01-28 삼성전자주식회사 화면간의 상관도를 이용한 화질 개선 회로 및 방법
US7042522B2 (en) * 2002-08-01 2006-05-09 Samsung Electronics Co., Ltd. Adaptive contrast enhancement method using time-varying nonlinear transforms on a video signal
AU2003270386A1 (en) * 2002-09-06 2004-03-29 Rytec Corporation Signal intensity range transformation apparatus and method
KR20040040699A (ko) * 2002-11-07 2004-05-13 삼성전자주식회사 콘트라스트 보정 장치 및 방법
US20040109091A1 (en) * 2002-12-03 2004-06-10 Samsung Electronics Co., Ltd. Apparatus and method for adaptive brightness control
US8135073B2 (en) * 2002-12-19 2012-03-13 Trident Microsystems (Far East) Ltd Enhancing video images depending on prior image enhancements
WO2004057535A1 (en) * 2002-12-20 2004-07-08 Koninklijke Philips Electronics N.V. Enhancing video images depending on prior image enhancements
KR100528537B1 (ko) * 2003-04-04 2005-11-15 엘지전자 주식회사 Ｌｃｄ 화면 밝기 자동 조절 장치 및 그 방법
KR100513273B1 (ko) * 2003-07-04 2005-09-09 이디텍 주식회사 동영상 신호의 실시간 밝기 제어 장치 및 방법
US7221408B2 (en) * 2003-08-15 2007-05-22 Samsung Electronics Co., Ltd. Adaptive contrast enhancement method for video signals based on time-varying nonlinear transforms
US7110046B2 (en) * 2003-11-04 2006-09-19 Cyberlink Corp. Method for dynamically adjusting video brightness
KR100965597B1 (ko) * 2003-12-29 2010-06-23 엘지디스플레이 주식회사 액정표시장치의 구동방법 및 구동장치
US7760961B2 (en) * 2004-10-15 2010-07-20 Caba Moldvai Adaptive contrast enhancement
US7715649B2 (en) * 2005-02-14 2010-05-11 Fujifilm Corporation Generation and adjustment of a luminance correction curve to prevent saturation of the image during contrast enhancement
KR100703527B1 (ko) * 2005-07-12 2007-04-03 삼성전자주식회사 핫코드 인식률 향상을 위한 이미지 전처리 방법 및 그 장치
CN100342710C (zh) * 2005-08-22 2007-10-10 上海广电（集团）有限公司中央研究院 增强图像的结构方法
US7288962B2 (en) * 2006-02-08 2007-10-30 Kyocera Wireless Corp. Level shifting multiplexing circuit for connecting a two conductor full duplex bus to a bidirectional single conductor bus
JP5196731B2 (ja) * 2006-04-20 2013-05-15 キヤノン株式会社 画像処理装置及び画像処理方法
TWI348135B (en) 2006-06-05 2011-09-01 Chunghwa Picture Tubes Ltd Image contrast correct system and method thereof
KR100849845B1 (ko) 2006-09-05 2008-08-01 삼성전자주식회사 영상 보정 방법 및 장치
US8806321B2 (en) * 2007-06-26 2014-08-12 Oracle International Corporation Interactive controls and information visualization using histogram equalization
EP2346568A2 (en) * 2008-09-16 2011-07-27 Second Sight Medical Products Digital image filters and related methods for image contrast enhancement
US8285040B1 (en) 2008-12-09 2012-10-09 Csr Technology Inc. Method and apparatus for adaptive contrast enhancement of image data
US8698961B2 (en) * 2010-05-21 2014-04-15 Vixs Systems, Inc. Enhanced histogram equalization
US8599318B2 (en) * 2010-05-21 2013-12-03 Vixs Systems, Inc. Contrast control device and method therefor
CN103414834B (zh) * 2013-07-26 2016-01-20 深圳市顶星数码网络技术有限公司 一种屏幕节电方法、装置及移动终端
CN109785252B (zh) * 2018-12-25 2023-03-24 山西大学 基于多尺度残差密集网络夜间图像增强方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341142A (en) * 1987-07-24 1994-08-23 Northrop Grumman Corporation Target acquisition and tracking system
US5289282A (en) * 1991-05-28 1994-02-22 Matsushita Electric Industrial Co., Ltd. Video signal gradation corrector
US5675624A (en) * 1995-12-14 1997-10-07 General Electric Company Adaptive x-ray brightness and display control for a medical imaging system

Also Published As

Publication number Publication date
DE69716803D1 (de) 2002-12-12
CN1081370C (zh) 2002-03-20
DE69716803T2 (de) 2003-03-27
JPH1032769A (ja) 1998-02-03
JP3130268B2 (ja) 2001-01-31
US5862254A (en) 1999-01-19
CN1162799A (zh) 1997-10-22
EP0801360A3 (en) 1998-01-21
EP0801360B1 (en) 2002-11-06
EP0801360A2 (en) 1997-10-15

Similar Documents

Publication Publication Date Title
ES2185874T3 (es) Procedimiento para mejorar la calidad de imagen mediante la ecualizacion de histograma por ajuste a la media y circuito para su realizacion.
ES2188863T3 (es) Procedimiento para la mejora de imagenes mediante ecualizacion de histogramas de medias independientes y circuito para el mismo.
ES2188862T3 (es) Procedimiento y circuito para la mejora de imagenes mediante ecualizacion de histogramas de medias cuantificadas independientes.
ATE357040T1 (de) Verfahren zur automatischen hintergrundlichteinstellung
DE60012653D1 (de) Bitlängenerweiterung durch Rauschverwendung in einer digitalen Anzeige
GB2316825B (en) Image enhancement method and circuit using quantized mean-matching histogram equalization
EP1158336A3 (en) System and method for varying the transmittance of light through a media
BR0302439A (pt) Tabela de conferência de meios/tela
EP0844784A3 (en) Image reading device, image reading apparatus, and method therefor
EP0992837A3 (en) Reflection type semiconductor display device
ATE237826T1 (de) Vorsatz für sehhilfen
DK0685092T3 (da) Fremgangsmåde og apparat til belysning og billeddannelse af en overflade
WO1992020183A3 (en) Method and apparatus for adaptively thresholding grayscale image data
EP1014688B8 (en) Image processing method and apparatus, image processing system, and storage medium
ES2098320T3 (es) Aparato para la comunicacion de imagenes en color.
CN1316428C (zh) 用于显示图像的方法和装置
CN108810318A (zh) 图像处理方法、装置、显示设备及计算机存储介质
CN102998889A (zh) 光源控制装置、图像显示装置及光源控制方法
AU2001270795A1 (en) Image enhancement
EP1109398A3 (de) Bilderfassungssystem zur Erzeugung eines Dunkel- und Hellbildes
WO2001083673A3 (en) Method and apparatus for viewing a culture medium having visible bacterial colonies
GB2363667A (en) Method and apparatus for correcting digital asymmetric read signals
ES2159533T3 (es) Aparato y metodo para el proceso de imagenes.
EP0651317A3 (en) Output method and apparatus for estimating image quality prior to output
TW200511149A (en) A method for calibration independent defect correction in an imaging system