DE69117677T2 - Schaltung zur Verbesserung der Bildqualität - Google Patents

Schaltung zur Verbesserung der Bildqualität

Info

Publication number
DE69117677T2
DE69117677T2 DE69117677T DE69117677T DE69117677T2 DE 69117677 T2 DE69117677 T2 DE 69117677T2 DE 69117677 T DE69117677 T DE 69117677T DE 69117677 T DE69117677 T DE 69117677T DE 69117677 T2 DE69117677 T2 DE 69117677T2
Authority
DE
Germany
Prior art keywords
improve
circuit
picture quality
picture
quality
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 - Fee Related
Application number
DE69117677T
Other languages
English (en)
Other versions
DE69117677D1 (de
Inventor
Hirohiko Sakashita
Naoji Okumura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE69117677D1 publication Critical patent/DE69117677D1/de
Publication of DE69117677T2 publication Critical patent/DE69117677T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
    • 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 by the use of histogram techniques
    • G06T5/92—
    • 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
DE69117677T 1990-11-19 1991-11-07 Schaltung zur Verbesserung der Bildqualität Expired - Fee Related DE69117677T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2313542A JPH04183177A (ja) 1990-11-19 1990-11-19 累積ヒストグラム回路および補間回路および画質補正回路

Publications (2)

Publication Number Publication Date
DE69117677D1 DE69117677D1 (de) 1996-04-11
DE69117677T2 true DE69117677T2 (de) 1996-10-31

Family

ID=18042578

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69117677T Expired - Fee Related DE69117677T2 (de) 1990-11-19 1991-11-07 Schaltung zur Verbesserung der Bildqualität

Country Status (3)

Country Link
EP (1) EP0488542B1 (de)
JP (1) JPH04183177A (de)
DE (1) DE69117677T2 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05176263A (ja) * 1991-12-20 1993-07-13 Matsushita Electric Ind Co Ltd 階調補正装置
SG63564A1 (en) * 1992-05-22 1999-03-30 Thomson Consumer Electronics Non-linear video signal processor employing picture element analysis
US5381450A (en) * 1993-08-20 1995-01-10 Hitachi America, Ltd. Technique for automatically detecting the constellation size of a quadrature amplitude modulated (QAM) signal
JPH0773308A (ja) * 1993-09-03 1995-03-17 Matsushita Electric Ind Co Ltd デジタル画像処理装置
BE1007608A3 (nl) * 1993-10-08 1995-08-22 Philips Electronics Nv Beeldsignaalverbeteringsschakeling.
BE1007777A3 (nl) * 1993-11-23 1995-10-17 Philips Electronics Nv Niet-lineaire signaalverwerking.
EP0801509B1 (de) * 1996-04-12 2006-07-19 Sony Corporation Videokamera, Videosignalverarbeitung, Videosignalkompression, und Videosignalumsetzung
KR980003999A (ko) * 1996-06-27 1998-03-30 김광호 Cdf 연산영역에 근거한 히스토그램 등화회로 및 그 방법
KR100213094B1 (ko) * 1997-02-21 1999-08-02 윤종용 영상 개선장치를 위한 히스토그램 및 cdf 추출방법 및 그 회로
MY118340A (en) * 1997-03-06 2004-10-30 Matsushita Electric Ind Co Ltd Histogram generator.
US7139426B2 (en) * 2002-02-12 2006-11-21 Tektronix, Inc. Histogram data collector for applying progressively adjusted histogram equalization to an oscilloscope image
JP4557090B2 (ja) * 2009-11-10 2010-10-06 セイコーエプソン株式会社 画像処理装置、画像処理方法、及び画像処理プログラム

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979555A (en) * 1975-05-27 1976-09-07 Hughes Aircraft Company Histogram equalization system for display improvement
FR2452216A1 (fr) * 1979-03-21 1980-10-17 Hajime Industries Procede et appareil pour le traitement d'informations relatives a un modele
FR2456448A1 (fr) * 1979-05-11 1980-12-05 Thomson Csf Dispositif de commande automatique de la fonction de transfert d'un systeme de transmission videofrequence en vue d'ameliorer la perception des images
CH651983A5 (de) * 1980-02-13 1985-10-15 Siemens Ag Albis Verfahren zur verbesserung der aufloesung eines videobildes.
JPS6273867A (ja) * 1985-09-26 1987-04-04 Canon Inc 画像分離方法
JPH0248728A (ja) * 1988-08-10 1990-02-19 Toshiba Corp ウィンドウ処理装置
JPH02268082A (ja) * 1989-04-10 1990-11-01 Fuji Xerox Co Ltd 画像切り出し方法

Also Published As

Publication number Publication date
EP0488542A1 (de) 1992-06-03
EP0488542B1 (de) 1996-03-06
DE69117677D1 (de) 1996-04-11
JPH04183177A (ja) 1992-06-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee