DE60134941D1 - Digital Abdunkeln/Aufhellen von halbtongerasterten Bildern - Google Patents

Digital Abdunkeln/Aufhellen von halbtongerasterten Bildern

Info

Publication number
DE60134941D1
DE60134941D1 DE60134941T DE60134941T DE60134941D1 DE 60134941 D1 DE60134941 D1 DE 60134941D1 DE 60134941 T DE60134941 T DE 60134941T DE 60134941 T DE60134941 T DE 60134941T DE 60134941 D1 DE60134941 D1 DE 60134941D1
Authority
DE
Germany
Prior art keywords
brightening
digital dimming
halftoned images
halftoned
images
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
DE60134941T
Other languages
English (en)
Inventor
Reiner Eschbach
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of DE60134941D1 publication Critical patent/DE60134941D1/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
    • 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
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
    • H04N1/4052—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size by error diffusion, i.e. transferring the binarising error to neighbouring dot decisions

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
DE60134941T 2000-11-27 2001-11-21 Digital Abdunkeln/Aufhellen von halbtongerasterten Bildern Expired - Lifetime DE60134941D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/722,914 US6816285B1 (en) 2000-11-27 2000-11-27 Digital darker/lighter for halftone images

Publications (1)

Publication Number Publication Date
DE60134941D1 true DE60134941D1 (de) 2008-09-04

Family

ID=24903953

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60134941T Expired - Lifetime DE60134941D1 (de) 2000-11-27 2001-11-21 Digital Abdunkeln/Aufhellen von halbtongerasterten Bildern

Country Status (4)

Country Link
US (1) US6816285B1 (de)
EP (1) EP1209899B1 (de)
JP (1) JP4104321B2 (de)
DE (1) DE60134941D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100611981B1 (ko) * 2004-05-01 2006-08-11 삼성전자주식회사 이미지의 하프토닝 방법 및 장치
US8208175B2 (en) * 2005-04-13 2012-06-26 Xerox Corporation Blended error diffusion and adaptive quantization
US7711211B2 (en) * 2005-06-08 2010-05-04 Xerox Corporation Method for assembling a collection of digital images
US9116924B2 (en) 2013-01-14 2015-08-25 Xerox Corporation System and method for image selection using multivariate time series analysis

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045952A (en) * 1989-08-21 1991-09-03 Xerox Corporation Method for edge enhanced error diffusion
US5258854A (en) 1991-12-06 1993-11-02 Xerox Corporation Converting between write-white, write-black and neutral bitmaps
JP3711707B2 (ja) * 1997-08-07 2005-11-02 ブラザー工業株式会社 画像２値化方法、画像２値化装置および記録媒体
US6751358B1 (en) * 1999-06-21 2004-06-15 Xerox Corporation Error diffusion for digital printing

Also Published As

Publication number Publication date
US6816285B1 (en) 2004-11-09
EP1209899A3 (de) 2004-07-21
JP4104321B2 (ja) 2008-06-18
EP1209899A2 (de) 2002-05-29
EP1209899B1 (de) 2008-07-23
JP2002223358A (ja) 2002-08-09

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition