DE68920903D1 - Bildverarbeitungsverfahren. - Google Patents

Bildverarbeitungsverfahren.

Info

Publication number
DE68920903D1
DE68920903D1 DE68920903T DE68920903T DE68920903D1 DE 68920903 D1 DE68920903 D1 DE 68920903D1 DE 68920903 T DE68920903 T DE 68920903T DE 68920903 T DE68920903 T DE 68920903T DE 68920903 D1 DE68920903 D1 DE 68920903D1
Authority
DE
Germany
Prior art keywords
image processing
image
processing
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
DE68920903T
Other languages
English (en)
Other versions
DE68920903T2 (de
Inventor
Ryohei C O Ezel Inc Kumagai
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.)
Yozan Inc
Original Assignee
Ezel Inc
Sharp Corp
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 Ezel Inc, Sharp Corp filed Critical Ezel Inc
Publication of DE68920903D1 publication Critical patent/DE68920903D1/de
Application granted granted Critical
Publication of DE68920903T2 publication Critical patent/DE68920903T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4072—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on the contents of the original
    • H04N1/4074—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on the contents of the original using histograms

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)
DE68920903T 1988-05-16 1989-05-12 Bildverarbeitungsverfahren. Expired - Lifetime DE68920903T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63118565A JP2709356B2 (ja) 1988-05-16 1988-05-16 画像処理方法

Publications (2)

Publication Number Publication Date
DE68920903D1 true DE68920903D1 (de) 1995-03-16
DE68920903T2 DE68920903T2 (de) 1995-05-24

Family

ID=14739743

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68920903T Expired - Lifetime DE68920903T2 (de) 1988-05-16 1989-05-12 Bildverarbeitungsverfahren.

Country Status (4)

Country Link
US (1) US5077808A (de)
EP (1) EP0342549B1 (de)
JP (1) JP2709356B2 (de)
DE (1) DE68920903T2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485281A (en) * 1992-07-31 1996-01-16 E. I. Du Pont De Nemours And Company Raster image processing with pixel mapping to allow image border density allocation
US5887079A (en) * 1996-01-31 1999-03-23 Sumitomo Metal Industries Limited Image processing apparatus
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
KR100543592B1 (ko) * 2004-03-29 2006-01-20 엘지전자 주식회사 플라즈마 디스플레이 패널의 화상처리 장치
JP2007067571A (ja) * 2005-08-29 2007-03-15 Fujitsu Ltd 画像処理装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5231134B2 (de) * 1972-01-24 1977-08-12
FR2293011A1 (fr) * 1974-09-16 1976-06-25 France Etat Perfectionnements aux procedes et dispositifs de normalisation d'images numeriques
JPS58215869A (ja) * 1982-06-07 1983-12-15 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション グレ−スケ−ル映像デ−タを縮少する方法
JPS59125176A (ja) * 1982-12-30 1984-07-19 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン ビデオイメ−ジのシエ−ジング効果の補正装置
DE3444366C3 (de) * 1983-12-09 1994-12-22 Canon Kk Bildverarbeitungseinrichtung
JPS60218181A (ja) * 1984-04-13 1985-10-31 Fujitsu Ltd 画像処理装置
US4639769A (en) * 1985-04-01 1987-01-27 Eastman Kodak Company Modifying color digital images
US4742551A (en) * 1985-10-07 1988-05-03 Fairchild Camera & Instrument Corporation Multistatistics gatherer
US4731863A (en) * 1986-04-07 1988-03-15 Eastman Kodak Company Digital image processing method employing histogram peak detection

Also Published As

Publication number Publication date
JPH01288974A (ja) 1989-11-21
JP2709356B2 (ja) 1998-02-04
US5077808A (en) 1991-12-31
DE68920903T2 (de) 1995-05-24
EP0342549A3 (de) 1991-10-09
EP0342549A2 (de) 1989-11-23
EP0342549B1 (de) 1995-02-01

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: YOZAN INC., TOKIO/TOKYO, JP SHARP CORP., OSAKA, JP