DE69224491T2 - Entrasterungsgerät und -verfahren - Google Patents

Entrasterungsgerät und -verfahren

Info

Publication number
DE69224491T2
DE69224491T2 DE69224491T DE69224491T DE69224491T2 DE 69224491 T2 DE69224491 T2 DE 69224491T2 DE 69224491 T DE69224491 T DE 69224491T DE 69224491 T DE69224491 T DE 69224491T DE 69224491 T2 DE69224491 T2 DE 69224491T2
Authority
DE
Germany
Prior art keywords
tone image
descreening
procedure
image
resolution changes
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
DE69224491T
Other languages
English (en)
Other versions
DE69224491D1 (de
Inventor
Daniel Seidner
Dan Eylon
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.)
Kodak IL Ltd
Original Assignee
Scitex Corp 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 Scitex Corp Ltd filed Critical Scitex Corp Ltd
Application granted granted Critical
Publication of DE69224491D1 publication Critical patent/DE69224491D1/de
Publication of DE69224491T2 publication Critical patent/DE69224491T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
    • G06T3/4007—Scaling of whole images or parts thereof, e.g. expanding or contracting based on interpolation, e.g. bilinear interpolation
    • 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
    • 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
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/58—Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Supports For Pipes And Cables (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Image Analysis (AREA)
DE69224491T 1991-04-30 1992-04-14 Entrasterungsgerät und -verfahren Expired - Fee Related DE69224491T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL9800491A IL98004A (en) 1991-04-30 1991-04-30 Apparatus and method for descreening

Publications (2)

Publication Number Publication Date
DE69224491D1 DE69224491D1 (de) 1998-04-02
DE69224491T2 true DE69224491T2 (de) 1998-06-18

Family

ID=11062364

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69224491T Expired - Fee Related DE69224491T2 (de) 1991-04-30 1992-04-14 Entrasterungsgerät und -verfahren

Country Status (6)

Country Link
US (2) US5333064A (de)
EP (1) EP0511754B1 (de)
JP (1) JPH06233118A (de)
AT (1) ATE163497T1 (de)
DE (1) DE69224491T2 (de)
IL (2) IL98004A (de)

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US6208769B1 (en) * 1998-05-28 2001-03-27 Acuity Imaging, Llc Method of accurately locating the fractional position of a template match point
US6222641B1 (en) * 1998-07-01 2001-04-24 Electronics For Imaging, Inc. Method and apparatus for image descreening
US6233060B1 (en) * 1998-09-23 2001-05-15 Seiko Epson Corporation Reduction of moiré in screened images using hierarchical edge detection and adaptive-length averaging filters
US6590676B1 (en) * 1999-05-18 2003-07-08 Electronics For Imaging, Inc. Image reconstruction architecture
US6628845B1 (en) * 1999-10-20 2003-09-30 Nec Laboratories America, Inc. Method for subpixel registration of images
WO2001050409A1 (en) * 1999-12-31 2001-07-12 Digimarc Corporation Compensating for color response and transfer function of scanner and/or printer when reading a digital watermark
US6839151B1 (en) * 2000-02-02 2005-01-04 Zoran Corporation System and method for color copy image processing
US6721458B1 (en) 2000-04-14 2004-04-13 Seiko Epson Corporation Artifact reduction using adaptive nonlinear filters
US7187475B1 (en) * 2000-09-28 2007-03-06 Zoran Corporation System and method for a robust de-screening filter
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
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
US7085015B2 (en) 2002-02-01 2006-08-01 Seiko Epson Corporation Inverse halftoning for multi-level halftones
JP4060748B2 (ja) * 2002-05-07 2008-03-12 松下電器産業株式会社 画像角度検出装置それを備えた走査線補間装置
EP1530377A4 (de) * 2002-06-28 2006-05-10 Nokia Corp Informationsterminal
US7433084B2 (en) * 2002-07-01 2008-10-07 Xerox Corporation Digital de-screening technique for scanned documents
US7218418B2 (en) * 2002-07-01 2007-05-15 Xerox Corporation Digital de-screening of documents
US7639392B2 (en) * 2003-03-28 2009-12-29 Infoprint Solutions Company, Llc Methods, systems, and media to enhance image processing in a color reprographic system
DE10325621B4 (de) * 2003-06-06 2006-02-16 Heidelberger Druckmaschinen Ag Verfahren zur Grauwertkorrektur für binäre Bilddaten
US7532363B2 (en) * 2003-07-01 2009-05-12 Xerox Corporation Apparatus and methods for de-screening scanned documents
US7365882B2 (en) * 2004-02-12 2008-04-29 Xerox Corporation Halftone screen frequency and magnitude estimation for digital descreening of documents
JP2006115078A (ja) * 2004-10-13 2006-04-27 Matsushita Electric Ind Co Ltd 画像データの信号処理装置及びその方法
JP4525403B2 (ja) * 2005-03-22 2010-08-18 富士ゼロックス株式会社 画像形成装置およびその制御方法
US7557963B2 (en) * 2005-08-12 2009-07-07 Seiko Epson Corporation Label aided copy enhancement
US8199363B2 (en) * 2006-11-17 2012-06-12 Samsung Electronics Co., Ltd. Image processing using hybrid lookup table
EP1924075B1 (de) * 2006-11-17 2013-07-31 Samsung Electronics Co., Ltd. Bildverarbeitung mit hybrider Nachschlagtabelle
US8638475B2 (en) * 2010-11-17 2014-01-28 Eastman Kodak Company Recreating step and repeat geometrical data
US8736894B2 (en) * 2011-12-20 2014-05-27 Eastman Kodak Company Producing correction data for printer
JP5809575B2 (ja) * 2012-01-31 2015-11-11 株式会社日立ハイテクノロジーズ 画像処理装置および方法と歪補正マップ作成装置および方法と半導体計測装置
US9019570B1 (en) 2013-11-27 2015-04-28 Mcgraw-Hill School Education Holdings Llc Systems and methods for computationally distinguishing handwritten pencil marks from preprinted marks in a scanned document
US9147262B1 (en) * 2014-08-25 2015-09-29 Xerox Corporation Methods and systems for image processing
US9578207B1 (en) * 2015-09-30 2017-02-21 Csr Imaging Us, Lp Systems and methods for selectively screening image data

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Also Published As

Publication number Publication date
US5333064A (en) 1994-07-26
IL98004A0 (en) 1992-06-21
EP0511754A3 (en) 1994-05-11
ATE163497T1 (de) 1998-03-15
EP0511754B1 (de) 1998-02-25
DE69224491D1 (de) 1998-04-02
JPH06233118A (ja) 1994-08-19
EP0511754A2 (de) 1992-11-04
IL98004A (en) 1997-02-18
US5384648A (en) 1995-01-24
IL115166A (en) 1997-02-18

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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: CREOSCITEX CORP. LTD., HERZLIA, IL

8327 Change in the person/name/address of the patent owner

Owner name: CREO IL. LTD., HERZLIA, IL

8339 Ceased/non-payment of the annual fee