CA2217555A1 - Clustered halftone dot design process - Google Patents

Clustered halftone dot design process

Info

Publication number
CA2217555A1
CA2217555A1 CA002217555A CA2217555A CA2217555A1 CA 2217555 A1 CA2217555 A1 CA 2217555A1 CA 002217555 A CA002217555 A CA 002217555A CA 2217555 A CA2217555 A CA 2217555A CA 2217555 A1 CA2217555 A1 CA 2217555A1
Authority
CA
Canada
Prior art keywords
screen
halftone dot
design process
clustered
pixels
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.)
Granted
Application number
CA002217555A
Other languages
French (fr)
Other versions
CA2217555C (en
Inventor
Shen-Ge Wang
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 CA2217555A1 publication Critical patent/CA2217555A1/en
Application granted granted Critical
Publication of CA2217555C publication Critical patent/CA2217555C/en
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
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern

Abstract

ABSTRACT OF THE DISCLOSURE

An idealized clustered screen is characterized spot clustering which is optimized so that clusters are about the same size and shape as they grow and are approximately equally distanced though an image. Pixels are swapped within the screen to vary its appearance. An optimization process iteratively checks a quality metric based on the optimum conditions, as pixels are swapped until an optimum screen appearance is obtained.
CA002217555A 1996-11-14 1997-10-07 Clustered halftone dot design process Expired - Fee Related CA2217555C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/749,306 1996-11-14
US08/749,306 US5787238A (en) 1996-11-14 1996-11-14 Clustered halftone dot design process

Publications (2)

Publication Number Publication Date
CA2217555A1 true CA2217555A1 (en) 1998-05-14
CA2217555C CA2217555C (en) 2002-01-22

Family

ID=25013184

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002217555A Expired - Fee Related CA2217555C (en) 1996-11-14 1997-10-07 Clustered halftone dot design process

Country Status (5)

Country Link
US (2) US5787238A (en)
EP (1) EP0843462A3 (en)
JP (1) JPH10164366A (en)
BR (1) BR9705655A (en)
CA (1) CA2217555C (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6020978A (en) * 1997-09-30 2000-02-01 Lexmark International, Inc. Method and apparatus for color halftoning using interlocked threshold arrays
US6356363B1 (en) 1997-09-30 2002-03-12 Lexmark International, Inc. Method for halftoning using interlocked threshold arrays or interlocked dot profiles
KR100275690B1 (en) * 1997-12-29 2000-12-15 윤종용 Image processing apparatus using mask
US6252679B1 (en) * 1998-11-18 2001-06-26 Xerox Corporation Composite halftone screens with stochastically distributed clusters or lines
JP3411843B2 (en) * 1998-12-28 2003-06-03 パナソニック コミュニケーションズ株式会社 MFP
US7092119B1 (en) * 1999-08-20 2006-08-15 International Business Machines Corporation Method, system, and program for managing calibration files in a printing system
JP3427026B2 (en) 1999-12-24 2003-07-14 大日本スクリーン製造株式会社 Halftone dot forming method and apparatus
US6775029B1 (en) 2000-10-30 2004-08-10 Xerox Corporation Method for efficient calibration of printing devices
US7088473B2 (en) * 2001-02-26 2006-08-08 Sony Corporation System and method for effectively implementing a dither matrix for an electronic printer device
US6724501B2 (en) * 2001-06-22 2004-04-20 Hewlett-Packard Development Company, L.P. Apparatus and method for dither matrix design for color halftoning using dispersed dot clusters
US7025515B2 (en) * 2003-05-20 2006-04-11 Software 2000 Ltd. Bit mask generation system
US7239429B2 (en) * 2003-05-29 2007-07-03 Seiko Epson Corporation Method and apparatus for generating dispersed cluster screen
US7446904B2 (en) * 2004-05-28 2008-11-04 Infoprint Solutions Company, Llc Methods and apparatus for generating dither mask through interpolation between preferred patterns
GB2419250C (en) * 2004-10-18 2008-04-24 Software 2000 Ltd Bit mask generation system.
US7616347B2 (en) * 2005-04-29 2009-11-10 International Business Machines Corporation System and method for multi-bit halftoning
US7626730B2 (en) * 2006-03-31 2009-12-01 Eastman Kodak Company Method of making a multilevel halftone screen
US8934142B2 (en) * 2013-04-30 2015-01-13 Hewlett-Packard Indigo B.V. Halftone screen
US9811923B2 (en) 2015-09-24 2017-11-07 Snaptrack, Inc. Stochastic temporal dithering for color display devices
CN112468791B (en) * 2020-11-25 2021-08-27 北京理工大学 Light intensity measurement iterative imaging method based on single-pixel detection

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149194A (en) * 1977-07-07 1979-04-10 Xerox Corporation Variable angle electronic halftone screening
DE3171227D1 (en) * 1981-09-12 1985-08-08 Hell Rudolf Dr Ing Gmbh Method for the production of printing plates by means of printing irregularly distributed points
US4752822A (en) * 1983-03-08 1988-06-21 Canon Kabushiki Kaisha Color halftone image processing apparatus producing various screen angles and having an adaptive color image data conversion look-up table and a small-capacity masking memory
DE3634939A1 (en) * 1986-10-14 1988-04-28 Du Pont Deutschland METHOD FOR RECORDING QUASI HALFTONE IMAGES
JPH02145085A (en) * 1988-11-25 1990-06-04 Fuji Xerox Co Ltd Film picture reader
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
US5442461A (en) * 1991-09-03 1995-08-15 Levien; Raphael L. Screen generation for halftone screening of images with reduction of irrational correction artifacts
EP0593304B1 (en) * 1992-10-15 1999-04-14 Digital Equipment Corporation Generation of templates having homogeneously distributed binary elements, for use in halftone image reproduction
US5317418A (en) * 1993-05-11 1994-05-31 Hewlett-Packard Company Halftone images using special filters
US5394252A (en) * 1994-03-02 1995-02-28 Xerox Corporation Hybrid quantization method for color document reproduction
US5673121A (en) * 1996-06-17 1997-09-30 Xerox Corporation Stochastic halftoning screening method

Also Published As

Publication number Publication date
US5787238A (en) 1998-07-28
CA2217555C (en) 2002-01-22
EP0843462A3 (en) 2003-05-21
BR9705655A (en) 1999-03-16
US5978556A (en) 1999-11-02
EP0843462A2 (en) 1998-05-20
JPH10164366A (en) 1998-06-19

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed