DE69318876D1 - System und Verfahren zur Umwandlung von Halbtonbildern in Bilder mit kontinuierlichen Tönen - Google Patents

System und Verfahren zur Umwandlung von Halbtonbildern in Bilder mit kontinuierlichen Tönen

Info

Publication number
DE69318876D1
DE69318876D1 DE69318876T DE69318876T DE69318876D1 DE 69318876 D1 DE69318876 D1 DE 69318876D1 DE 69318876 T DE69318876 T DE 69318876T DE 69318876 T DE69318876 T DE 69318876T DE 69318876 D1 DE69318876 D1 DE 69318876D1
Authority
DE
Germany
Prior art keywords
images
continuous tone
converting halftone
converting
halftone 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 - Fee Related
Application number
DE69318876T
Other languages
English (en)
Other versions
DE69318876T2 (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
Application granted granted Critical
Publication of DE69318876D1 publication Critical patent/DE69318876D1/de
Publication of DE69318876T2 publication Critical patent/DE69318876T2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
DE69318876T 1992-03-25 1993-03-23 System und Verfahren zur Umwandlung von Halbtonbildern in Bilder mit kontinuierlichen Tönen Expired - Fee Related DE69318876T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/857,557 US5243444A (en) 1992-03-25 1992-03-25 Image processing system and method with improved reconstruction of continuous tone images from halftone images including those without a screen structure

Publications (2)

Publication Number Publication Date
DE69318876D1 true DE69318876D1 (de) 1998-07-09
DE69318876T2 DE69318876T2 (de) 1998-12-10

Family

ID=25326260

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69318876T Expired - Fee Related DE69318876T2 (de) 1992-03-25 1993-03-23 System und Verfahren zur Umwandlung von Halbtonbildern in Bilder mit kontinuierlichen Tönen

Country Status (4)

Country Link
US (1) US5243444A (de)
EP (1) EP0562813B1 (de)
JP (1) JPH0614195A (de)
DE (1) DE69318876T2 (de)

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JP2811623B2 (ja) * 1992-07-27 1998-10-15 テクトロニクス・インコーポレイテッド 印刷装置
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US5444552A (en) * 1992-09-28 1995-08-22 Xerox Corporation Method for compressing, processing, and storing grayscale bitmaps
US5631977A (en) * 1992-12-08 1997-05-20 Fuji Xerox Co., Ltd. Encoding device for encoding an image along an order determined by resolution tone level
US5506699A (en) * 1993-04-27 1996-04-09 Wong; Ping W. Method and apparatus for converting a halftone image into a continuous tone image
US5359676A (en) * 1993-07-19 1994-10-25 Xerox Corporation Decompression of standard ADCT-compressed document images
US5692109A (en) * 1994-07-01 1997-11-25 Seiko Epson Corporation Method and apparatus for minimizing artifacts in images produced by error diffusion halftoning
US5592592A (en) * 1994-07-01 1997-01-07 Seiko Epson Corporation Method and apparatus for minimizing artifacts in images produced by error diffusion halftoning utilizing ink reduction processing
JP3381755B2 (ja) * 1994-10-11 2003-03-04 セイコーエプソン株式会社 画像の粒状性を減らすための改良された適応性のあるフィルタリングおよび閾値設定の方法及び装置
US5798846A (en) * 1996-05-28 1998-08-25 Hewlett-Packard Company Apparatus and method for selectively processing a scanned image
US5799112A (en) * 1996-08-30 1998-08-25 Xerox Corporation Method and apparatus for wavelet-based universal halftone image unscreening
US6163629A (en) * 1998-01-30 2000-12-19 Compaq Computer Corporation Method for low complexity low memory inverse dithering
US6101285A (en) * 1998-03-23 2000-08-08 Xerox Corporation Filter for producing continuous tone images from halftone digital images data
AUPQ289099A0 (en) * 1999-09-16 1999-10-07 Silverbrook Research Pty Ltd Method and apparatus for manipulating a bayer image
US6864994B1 (en) 2000-01-19 2005-03-08 Xerox Corporation High-speed, high-quality descreening system and method
US7495805B1 (en) 2000-02-25 2009-02-24 The Hong Kong University Of Science And Technology Enhancing an image, such as an image having bi-valued pixel values
US6975427B1 (en) * 2000-03-27 2005-12-13 International Business Machines Corporation Method, system, and program for using look-up tables to filter raster data
US20020016750A1 (en) * 2000-06-20 2002-02-07 Olivier Attia System and method for scan-based input, storage and retrieval of information over an interactive communication network
US6839152B2 (en) 2000-12-06 2005-01-04 Xerox Corporation Adaptive filtering method and apparatus for descreening scanned halftoned image representations
US6947178B2 (en) * 2001-02-26 2005-09-20 International Business Machines Corporation De-screening halftones using sigma filters
US7262879B2 (en) * 2001-03-28 2007-08-28 Sharp Laboratories Of America, Inc. Method for screening of halftone images
JP2003219171A (ja) * 2002-01-24 2003-07-31 Dainippon Screen Mfg Co Ltd 網点面積変更方法ならびに網点面積変更プログラム
US7085015B2 (en) 2002-02-01 2006-08-01 Seiko Epson Corporation Inverse halftoning for multi-level halftones
US7156311B2 (en) * 2003-07-16 2007-01-02 Scanbuy, Inc. System and method for decoding and analyzing barcodes using a mobile device
US7242816B2 (en) * 2003-08-11 2007-07-10 Scanbuy, Inc. Group average filter algorithm for digital image processing
US7387250B2 (en) * 2003-12-04 2008-06-17 Scanbuy, Inc. System and method for on the spot purchasing by scanning barcodes from screens with a mobile device
DK1719068T3 (da) * 2003-12-04 2010-10-18 Scanbuy Inc Sektionbaseret algoritme til billedforbedring
US7296747B2 (en) * 2004-04-20 2007-11-20 Michael Rohs Visual code system for camera-equipped mobile devices and applications thereof
US7822285B2 (en) * 2004-05-20 2010-10-26 Omnivision Technologies, Inc. Methods and systems for locally adaptive image processing filters
US7309015B2 (en) * 2004-07-14 2007-12-18 Scanbuy, Inc. Mobile device gateway providing access to instant information
US20060103892A1 (en) * 2004-11-18 2006-05-18 Schulze Mark A System and method for a vector difference mean filter for noise suppression
DE102005032997A1 (de) * 2005-07-14 2007-01-18 Giesecke & Devrient Gmbh Gitterbild und Verfahren zu seiner Herstellung
US7676074B2 (en) * 2005-09-12 2010-03-09 Purdue Research Foundation Systems and methods for filtering data in a medical imaging system
US8016187B2 (en) * 2006-02-21 2011-09-13 Scanbury, Inc. Mobile payment system using barcode capture
US7590298B2 (en) * 2006-04-12 2009-09-15 Xerox Corporation Decompression with reduced ringing artifacts
US8150163B2 (en) 2006-04-12 2012-04-03 Scanbuy, Inc. System and method for recovering image detail from multiple image frames in real-time
US7991235B2 (en) 2007-02-27 2011-08-02 Xerox Corporation Light compression for color images using error diffusion
US7688333B2 (en) * 2007-02-28 2010-03-30 Lsi Corporation Method and/or apparatus for color space reduction for transcoding subpicture elements
US8437043B2 (en) * 2007-07-19 2013-05-07 Xerox Corporation Compression of grayscale image data using multi-bit halftoning
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
US8289573B2 (en) * 2009-01-12 2012-10-16 Xerox Corporation Method for reducing registration defects in color printing
US8330990B2 (en) * 2009-01-12 2012-12-11 Xerox Corporation Method and system for modifying a multi-bit rasterized digital image to reduce registration artifacts
WO2017177219A1 (en) 2016-04-08 2017-10-12 Jlg Industries, Inc. Platform load sensing system

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JPS5814270A (ja) * 1981-07-17 1983-01-27 Fuji Photo Film Co Ltd 画像走査記録方法
US4503461A (en) * 1983-02-22 1985-03-05 The Board Of Trustees Of The Leland, Stanford Junior University Multiple measurement noise reducing system using space-variant filters
US4630125A (en) * 1983-06-01 1986-12-16 Xerox Corporation Unscreening of stored digital halftone images
IL70213A (en) * 1983-11-13 1988-02-29 Paul Fenster Digital fluorographic image enhancement system
US4651287A (en) * 1984-06-14 1987-03-17 Tsao Sherman H Digital image processing algorithm for output devices with discrete halftone gray scale capability
JPS6110360A (ja) * 1984-06-26 1986-01-17 Canon Inc 画像処理装置
DE3686821T2 (de) * 1985-01-10 1993-04-01 Nippon Telegraph & Telephone Halbtonbildverarbeitungseinrichtung.
JPS62118676A (ja) * 1985-11-18 1987-05-30 Sharp Corp 画像処理方式
US4841377A (en) * 1986-06-14 1989-06-20 Konishiroku Photo Industry Co., Ltd. Continuous image estimation method
US5027078A (en) * 1989-10-10 1991-06-25 Xerox Corporation Unscreening of stored digital halftone images by logic filtering
US5001429A (en) * 1989-11-21 1991-03-19 General Electric Company Removal of truncation artifacts in NMR imaging

Also Published As

Publication number Publication date
JPH0614195A (ja) 1994-01-21
DE69318876T2 (de) 1998-12-10
US5243444A (en) 1993-09-07
EP0562813B1 (de) 1998-06-03
EP0562813A1 (de) 1993-09-29

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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