DE69026329T2 - Entrasterung von gespeicherten digitalen Halbtonbildern durch logisches Filtrieren - Google Patents

Entrasterung von gespeicherten digitalen Halbtonbildern durch logisches Filtrieren

Info

Publication number
DE69026329T2
DE69026329T2 DE69026329T DE69026329T DE69026329T2 DE 69026329 T2 DE69026329 T2 DE 69026329T2 DE 69026329 T DE69026329 T DE 69026329T DE 69026329 T DE69026329 T DE 69026329T DE 69026329 T2 DE69026329 T2 DE 69026329T2
Authority
DE
Germany
Prior art keywords
descreening
stored digital
halftone images
digital halftone
logical filtering
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
DE69026329T
Other languages
English (en)
Other versions
DE69026329D1 (de
Inventor
Zhigang Fan
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
Publication of DE69026329D1 publication Critical patent/DE69026329D1/de
Application granted granted Critical
Publication of DE69026329T2 publication Critical patent/DE69026329T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04N1/40075—Descreening, i.e. converting a halftone signal into a corresponding continuous-tone signal; Rescreening, i.e. combined descreening and halftoning
DE69026329T 1989-10-10 1990-10-09 Entrasterung von gespeicherten digitalen Halbtonbildern durch logisches Filtrieren Expired - Fee Related DE69026329T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/419,517 US5027078A (en) 1989-10-10 1989-10-10 Unscreening of stored digital halftone images by logic filtering

Publications (2)

Publication Number Publication Date
DE69026329D1 DE69026329D1 (de) 1996-05-09
DE69026329T2 true DE69026329T2 (de) 1996-09-05

Family

ID=23662614

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69026329T Expired - Fee Related DE69026329T2 (de) 1989-10-10 1990-10-09 Entrasterung von gespeicherten digitalen Halbtonbildern durch logisches Filtrieren

Country Status (4)

Country Link
US (1) US5027078A (de)
EP (1) EP0422588B1 (de)
JP (1) JP3096054B2 (de)
DE (1) DE69026329T2 (de)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6009193A (en) * 1990-05-16 1999-12-28 Canon Kabushiki Kaisha Method and apparatus for converting N-value image to M-value image, for < NM
GB9012326D0 (en) * 1990-06-01 1990-07-18 Thomson Consumer Electronics Wide screen television
US5323247A (en) * 1990-12-04 1994-06-21 Research Corporation Technologies Method and apparatus for halftoning and inverse halftoning and the transmission of such images
US5341228A (en) 1990-12-04 1994-08-23 Research Corporation Technologies Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
JPH06506323A (ja) * 1991-01-10 1994-07-14 コダック・リミテッド 画像アンディザ化装置及び方法
US5285291A (en) * 1991-02-08 1994-02-08 Adobe Systems Incorporated Methods of assigning pixels to cells of a halftone grid
IL98004A (en) * 1991-04-30 1997-02-18 Scitex Corp Ltd Apparatus and method for descreening
US5339170A (en) * 1991-12-31 1994-08-16 Xerox Corporation Image processing system and method employing hybrid filtering to provide improved reconstruction of continuous tone images from halftone screen-structured images
US5243444A (en) * 1992-03-25 1993-09-07 Xerox Corporation Image processing system and method with improved reconstruction of continuous tone images from halftone images including those without a screen structure
US5359430A (en) * 1992-05-15 1994-10-25 Microsoft Corporation Block-halftoning method and system with compressed error image
US5444551A (en) * 1992-07-22 1995-08-22 Eastman Kodak Company Process for specifying mean-preserving mutli-level halftone matrices with varying amounts of modulation
US5343309A (en) * 1992-08-12 1994-08-30 Xerox Corporation Image processing system and method employing adaptive filtering to provide improved reconstruction of continuous tone images from halftone images including those without a screen structure
US5317418A (en) * 1993-05-11 1994-05-31 Hewlett-Packard Company Halftone images using special filters
DE69517855T2 (de) * 1994-04-29 2001-03-01 Adobe Systems Inc Verfahren zur Erzeugung einer Schwellenmatrix
US5633729A (en) * 1994-12-22 1997-05-27 Eastman Kodak Company Processes for minimizing the quantization error in multi-level halftone transfer functions
US5799112A (en) * 1996-08-30 1998-08-25 Xerox Corporation Method and apparatus for wavelet-based universal halftone image unscreening
US6101285A (en) * 1998-03-23 2000-08-08 Xerox Corporation Filter for producing continuous tone images from halftone digital images data
US6335989B1 (en) * 1998-07-31 2002-01-01 Hewlett-Packard Company Halftone printing using donut filters
US6356654B1 (en) 1998-12-23 2002-03-12 Xerox Corporation Systems and methods for template matching of multicolored images
US6343159B1 (en) 1998-12-23 2002-01-29 Xerox Corporation Method and apparatus for modeling and reconstruction of halftoned images
US6301397B1 (en) 1998-12-30 2001-10-09 Xerox Corporation Systems and methods for rotating high addressability images
US6363177B1 (en) 1998-12-30 2002-03-26 Xerox Corporation Systems and methods for rotating high addressability images
US6381372B1 (en) 1998-12-30 2002-04-30 Xerox Corporation Systems and methods for designing image processing filters using templates
US6864994B1 (en) 2000-01-19 2005-03-08 Xerox Corporation High-speed, high-quality descreening system and method
US7085016B2 (en) * 2000-11-21 2006-08-01 Silicon Integrated Systems Corp. Method and apparatus for dithering and inversely dithering in image processing and computer graphics
US6839152B2 (en) 2000-12-06 2005-01-04 Xerox Corporation Adaptive filtering method and apparatus for descreening scanned halftoned image representations
JPWO2002054545A1 (ja) * 2000-12-27 2004-05-13 住友電気工業株式会社 増幅用光ファイバ、光ファイバ増幅器及び光伝送システム
US7262879B2 (en) * 2001-03-28 2007-08-28 Sharp Laboratories Of America, Inc. Method for screening of halftone images
US7228002B2 (en) * 2001-05-14 2007-06-05 Intel Corporation Inverse halftoning process
US7170641B2 (en) * 2001-09-05 2007-01-30 Agfa Corporation Method of generating medium resolution proofs from high resolution image data
JP2003158637A (ja) 2001-11-21 2003-05-30 Sony Corp 印画装置及び印画方法、並びに印画システム
US7085015B2 (en) 2002-02-01 2006-08-01 Seiko Epson Corporation Inverse halftoning for multi-level halftones
FR2889382A1 (fr) * 2005-07-29 2007-02-02 Canon Res Ct France Soc Par Ac Procede et dispositif de filtrage d'un signal numerique multidimensionnel et procedes et dispositifs de codage et decodage associes
JP4906673B2 (ja) * 2007-10-24 2012-03-28 株式会社リコー 画像処理装置、画像処理方法及び画像処理プログラム
US8983182B1 (en) * 2013-09-18 2015-03-17 Xerox Corporation System and method for estimating continuous tone values from rendered binary input
JP6260777B2 (ja) 2014-02-28 2018-01-17 富士ゼロックス株式会社 画像処理装置および画像処理プログラム

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4630125A (en) * 1983-06-01 1986-12-16 Xerox Corporation Unscreening of stored digital halftone images
GB8506931D0 (en) * 1985-03-18 1985-04-24 Crosfield Electronics Ltd Image processing
US4841377A (en) * 1986-06-14 1989-06-20 Konishiroku Photo Industry Co., Ltd. Continuous image estimation method
NL8602712A (nl) * 1986-10-29 1988-05-16 Oce Nederland Bv Werkwijze voor het reconstrueren van een dithermatrix.

Also Published As

Publication number Publication date
EP0422588A2 (de) 1991-04-17
US5027078A (en) 1991-06-25
DE69026329D1 (de) 1996-05-09
JP3096054B2 (ja) 2000-10-10
EP0422588B1 (de) 1996-04-03
JPH03187571A (ja) 1991-08-15
EP0422588A3 (en) 1992-07-01

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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