FI104521B - Förfarande för förbättring av kontrast i bildsekvenser - Google Patents

Förfarande för förbättring av kontrast i bildsekvenser Download PDF

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Publication number
FI104521B
FI104521B FI970388A FI970388A FI104521B FI 104521 B FI104521 B FI 104521B FI 970388 A FI970388 A FI 970388A FI 970388 A FI970388 A FI 970388A FI 104521 B FI104521 B FI 104521B
Authority
FI
Finland
Prior art keywords
histogram
class
values
distribution
histograms
Prior art date
Application number
FI970388A
Other languages
English (en)
Finnish (fi)
Other versions
FI970388A (sv
FI970388A0 (sv
Inventor
Petri Nenonen
Original Assignee
Nokia Multimedia Network Termi
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 Nokia Multimedia Network Termi filed Critical Nokia Multimedia Network Termi
Priority to FI970388A priority Critical patent/FI104521B/sv
Publication of FI970388A0 publication Critical patent/FI970388A0/sv
Priority to EP98101222A priority patent/EP0856813B1/en
Priority to DE69806981T priority patent/DE69806981T2/de
Priority to US09/014,954 priority patent/US6148103A/en
Publication of FI970388A publication Critical patent/FI970388A/sv
Application granted granted Critical
Publication of FI104521B publication Critical patent/FI104521B/sv

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10016—Video; Image sequence

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)
  • Studio Devices (AREA)
  • Television Receiver Circuits (AREA)
FI970388A 1997-01-30 1997-01-30 Förfarande för förbättring av kontrast i bildsekvenser FI104521B (sv)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FI970388A FI104521B (sv) 1997-01-30 1997-01-30 Förfarande för förbättring av kontrast i bildsekvenser
EP98101222A EP0856813B1 (en) 1997-01-30 1998-01-24 Method for improving contrast in picture sequences
DE69806981T DE69806981T2 (de) 1997-01-30 1998-01-24 Verfahren zur Kontrastverbesserung von Bildsequenzen
US09/014,954 US6148103A (en) 1997-01-30 1998-01-28 Method for improving contrast in picture sequences

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI970388A FI104521B (sv) 1997-01-30 1997-01-30 Förfarande för förbättring av kontrast i bildsekvenser
FI970388 1997-01-30

Publications (3)

Publication Number Publication Date
FI970388A0 FI970388A0 (sv) 1997-01-30
FI970388A FI970388A (sv) 1998-07-31
FI104521B true FI104521B (sv) 2000-02-15

Family

ID=8547928

Family Applications (1)

Application Number Title Priority Date Filing Date
FI970388A FI104521B (sv) 1997-01-30 1997-01-30 Förfarande för förbättring av kontrast i bildsekvenser

Country Status (4)

Country Link
US (1) US6148103A (sv)
EP (1) EP0856813B1 (sv)
DE (1) DE69806981T2 (sv)
FI (1) FI104521B (sv)

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US6826310B2 (en) 2001-07-06 2004-11-30 Jasc Software, Inc. Automatic contrast enhancement
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US7174049B2 (en) * 2002-12-11 2007-02-06 Seiko Epson Corporation Image upscaling by joint optimization of low and mid-level image variables
SG118191A1 (en) * 2003-06-27 2006-01-27 St Microelectronics Asia Method and system for contrast enhancement of digital video
KR100512976B1 (ko) * 2003-08-09 2005-09-07 삼성전자주식회사 화면의 콘트라스트를 향상시키는 블랙/화이트 스트레칭시스템 및 그의 스트레칭 방법
US20050057485A1 (en) * 2003-09-15 2005-03-17 Diefenbaugh Paul S. Image color transformation to compensate for register saturation
TWI283396B (en) * 2004-03-23 2007-07-01 Lite On Technology Corp Method for adjusting image contrast
FI20045201A (sv) 2004-05-31 2005-12-01 Nokia Corp Förfarande och anordning för att se på bilder och förbättra desamma
US7936919B2 (en) * 2005-01-18 2011-05-03 Fujifilm Corporation Correction of color balance of face images depending upon whether image is color or monochrome
JP4533330B2 (ja) * 2005-04-12 2010-09-01 キヤノン株式会社 画像形成装置及び画像形成方法
US20090116762A1 (en) * 2005-06-07 2009-05-07 Shu Lin Content-based gaussian noise reduction for still image, video and film
US7796153B1 (en) * 2005-07-08 2010-09-14 Itt Manufacturing Enterprises, Inc. Equalization system and method for an imaging sensor
JP4551836B2 (ja) * 2005-07-29 2010-09-29 株式会社東芝 映像信号処理装置及び映像信号処理方法
US7512269B2 (en) 2005-08-04 2009-03-31 Asaf Golan Method of adaptive image contrast enhancement
JP4504284B2 (ja) * 2005-08-30 2010-07-14 株式会社東芝 映像信号処理装置及び映像信号処理方法
CN100407765C (zh) * 2005-09-07 2008-07-30 逐点半导体（上海）有限公司 图像对比度增强装置及增强方法
TWI318534B (en) * 2006-03-23 2009-12-11 Novatek Microelectronics Corp Method for processing brightness of an image and related device
EP1840831A1 (en) * 2006-03-31 2007-10-03 Sony Deutschland Gmbh Adaptive histogram equalization for images with strong local contrast
SG139602A1 (en) * 2006-08-08 2008-02-29 St Microelectronics Asia Automatic contrast enhancement
US8009907B1 (en) * 2006-11-08 2011-08-30 Marvell International Ltd. Localized, adaptive video contrast enhancement using controlled histogram equalization
US8260077B2 (en) * 2006-11-29 2012-09-04 Mstar Semiconductor, Inc. Method and apparatus for eliminating image blur
JP4850689B2 (ja) * 2006-12-22 2012-01-11 キヤノン株式会社 画像処理装置、画像処理方法、画像処理プログラム並びに記憶媒体
JP4861845B2 (ja) * 2007-02-05 2012-01-25 富士通株式会社 テロップ文字抽出プログラム、記録媒体、方法及び装置
US8711249B2 (en) * 2007-03-29 2014-04-29 Sony Corporation Method of and apparatus for image denoising
US8108211B2 (en) * 2007-03-29 2012-01-31 Sony Corporation Method of and apparatus for analyzing noise in a signal processing system
TWI376661B (en) * 2007-03-30 2012-11-11 Novatek Microelectronics Corp Contrast control apparatus and contrast control method and image display
US8144985B2 (en) * 2007-12-21 2012-03-27 Sony Corporation Method of high dynamic range compression with detail preservation and noise constraints
JP5180916B2 (ja) * 2008-06-25 2013-04-10 株式会社半導体エネルギー研究所 画像処理システム、及び画像処理方法
US8781248B2 (en) * 2010-01-28 2014-07-15 Stmicroelectronics Asia Pacific Pte. Ltd. Image details preservation and enhancement
TR201001660A2 (tr) 2010-03-04 2011-09-21 Vestel Elektron�K Sanay� Ve T�Caret A.�. Dinamik aralık genişletme için siyah ve beyaz çekme yöntemi.
US8599318B2 (en) * 2010-05-21 2013-12-03 Vixs Systems, Inc. Contrast control device and method therefor
US8698961B2 (en) * 2010-05-21 2014-04-15 Vixs Systems, Inc. Enhanced histogram equalization
WO2012050203A1 (ja) * 2010-10-15 2012-04-19 シャープ株式会社 画像処理装置、画像処理方法、画像処理プログラム、記録媒体
US8755625B2 (en) 2010-11-19 2014-06-17 Analog Devices, Inc. Component filtering for low-light noise reduction
US20120128244A1 (en) * 2010-11-19 2012-05-24 Raka Singh Divide-and-conquer filter for low-light noise reduction
US9041864B2 (en) * 2012-11-19 2015-05-26 Nokia Technologies Oy Method and apparatus for temporal stabilization of streaming frames
KR102051538B1 (ko) * 2013-09-13 2020-01-08 에스케이하이닉스 주식회사 신호 처리 장치 및 그의 동작 방법
CN111445394B (zh) * 2019-12-10 2023-06-20 西南技术物理研究所 空对地观测的可见光图像自适应增强方法

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KR100207426B1 (ko) * 1996-05-08 1999-07-15 전주범 무늬의 크기와 방향성을 이용한 텍스쳐 분류 장치

Also Published As

Publication number Publication date
US6148103A (en) 2000-11-14
EP0856813A3 (en) 1998-12-09
DE69806981D1 (de) 2002-09-12
EP0856813B1 (en) 2002-08-07
FI970388A (sv) 1998-07-31
FI970388A0 (sv) 1997-01-30
DE69806981T2 (de) 2003-05-08
EP0856813A2 (en) 1998-08-05

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