ES2165981T3 - Pantalla de tramado que utiliza una funcion de mancha para clasificar pixeles siguiendo una o mas reglas de diseño. - Google Patents

Pantalla de tramado que utiliza una funcion de mancha para clasificar pixeles siguiendo una o mas reglas de diseño.

Info

Publication number
ES2165981T3
ES2165981T3 ES96913136T ES96913136T ES2165981T3 ES 2165981 T3 ES2165981 T3 ES 2165981T3 ES 96913136 T ES96913136 T ES 96913136T ES 96913136 T ES96913136 T ES 96913136T ES 2165981 T3 ES2165981 T3 ES 2165981T3
Authority
ES
Spain
Prior art keywords
half tone
cells
screen
pixels
larger
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
ES96913136T
Other languages
English (en)
Inventor
Jae-Hwal Yoo
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.)
Ricoh Printing Systems America Inc
Original Assignee
Dataproducts 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 Dataproducts Corp filed Critical Dataproducts Corp
Application granted granted Critical
Publication of ES2165981T3 publication Critical patent/ES2165981T3/es
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
    • H04N1/405—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Color, Gradation (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)

Abstract

SE REVELA UN METODO DE REALIZACION DE MEDIOS TONOS SOBRE UNA REGION DE PIXELES DE SALIDA MEDIANTE LA DEFINICION DE CELDAS DE MEDIOS TONOS MAS GRANDES (12) CORRESPONDIENTES A REGIONES DE PIXELES CONTIGUOS (22) Y DIVIDIENDO LAS CELDAS DE MEDIOS TONOS MAS PEQUEÑAS (24). EL NUMERO DE NIVELES DE GRISES SE DETERMINA POR EL NUMERO DE PIXELES DENTRO DE LA CELDA DE MEDIOS TONOS MAS GRANDE MIENTRAS LA RESOLUCION SE DEFINE POR EL TAMAÑO DE LAS CELDAS DE MEDIOS TONOS MAS PEQUEÑAS DENTRO DE LAS CELDAS DE MEDIOS TONOS MAS GRANDES. UN NIVEL PREDETERMINADO DE GRIS DETERMINA EL NUMERO DE PIXELES A OSCURECER DENTRO DE LA CELDA DE MEDIOS TONOS MAS GRANDE, Y LOS PIXELES SE OSCURECEN DENTRO DE LA CELDA DE MEDIOS TONOS MAS PEQUEÑA SEGUN UNA FUNCION DE LUGAR. LAS CELDAS DE MEDIOS TONOS MAS GRANDES SE DIVIDEN EN CELDAS DE MEDIOS TONOS MAS PEQUEÑAS TAL QUE LA CELDA DE MEDIOS TONOS MAS GRANDE TENGA EXACTAMENTE UNA CELDA DE MEDIOS TONOS MAS PEQUEÑA CENTRADA.
ES96913136T 1995-04-28 1996-04-26 Pantalla de tramado que utiliza una funcion de mancha para clasificar pixeles siguiendo una o mas reglas de diseño. Expired - Lifetime ES2165981T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/430,881 US5587811A (en) 1995-04-28 1995-04-28 Halftone screen using spot function to rank pixels following one or more design rules

Publications (1)

Publication Number Publication Date
ES2165981T3 true ES2165981T3 (es) 2002-04-01

Family

ID=23709468

Family Applications (1)

Application Number Title Priority Date Filing Date
ES96913136T Expired - Lifetime ES2165981T3 (es) 1995-04-28 1996-04-26 Pantalla de tramado que utiliza una funcion de mancha para clasificar pixeles siguiendo una o mas reglas de diseño.

Country Status (8)

Country Link
US (1) US5587811A (es)
EP (1) EP0826284B1 (es)
JP (1) JPH11504476A (es)
AU (1) AU5573996A (es)
DE (1) DE69616045T2 (es)
DK (1) DK0826284T3 (es)
ES (1) ES2165981T3 (es)
WO (1) WO1996034488A1 (es)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69425244T2 (de) * 1994-04-27 2001-01-25 Agfa-Gevaert N.V., Mortsel Tonabhängige Rosettenstrukturen bei der Mehrschichthalbtonrasterung durch Phasenmodulation
EP0680195B1 (en) * 1994-04-27 2002-08-07 Agfa-Gevaert Clustered dot and line multilevel halftoning for electrographic colour printing
GB9711202D0 (en) * 1997-05-30 1997-07-23 Fujifilm Electronic Imaging Li Method and apparatus for generating a bitmap
US5991513A (en) * 1997-09-30 1999-11-23 Levien; Raphael L Method and apparatus for suppressing moire patterns
US6185005B1 (en) * 1998-04-30 2001-02-06 Hitachi Koki Imaging Solutions, Inc. Half tone image enhancement for printers
JP3663967B2 (ja) * 1999-04-05 2005-06-22 富士ゼロックス株式会社 画像処理方法及び画像処理装置
US6687023B1 (en) 2000-04-17 2004-02-03 International Business Machines Corporation Data processing system and method for producing shifted-element halftone screens
US7835034B1 (en) 2000-05-16 2010-11-16 Infoprint Solutions Company, Llc Halftone method and apparatus that provides a line screen frequency of N/2 for a printer resolution of N dots per inch without negative print effects
US7170639B1 (en) * 2000-05-16 2007-01-30 International Business Machines Corporation Halftone method and apparatus that provides simultaneous, multiple lines per inch screens
US6853469B1 (en) * 2000-05-26 2005-02-08 International Business Machines Corporation Method and system for digital printing by density scheduling
US7009736B2 (en) * 2000-12-22 2006-03-07 Texas Instruments Incorporated Tile map based multi-level supercell screening
US20020149599A1 (en) * 2001-04-12 2002-10-17 Honeywell International Inc. Methods and apparatus for displaying multiple data categories
US7310168B2 (en) * 2001-07-03 2007-12-18 Infoprint Solutions Company Llc Method and apparatus for controlling a spot function for digital halftoning
JP4150206B2 (ja) * 2001-10-29 2008-09-17 富士フイルム株式会社 網点閾値データ作成方法
US7564588B2 (en) * 2002-01-24 2009-07-21 Ricoh Company, Ltd. Image forming device, image forming method, and recording medium that provide multi-level error diffusion
US7345790B2 (en) * 2003-01-21 2008-03-18 Dittrich Danielle K Method and apparatus for simulating 2 bit-per-pel printing on a bi-level printer using intelligent double dotting
US20060197989A1 (en) * 2005-03-07 2006-09-07 Toshiba Corporation Multi-configured halftone system
US7599097B2 (en) * 2005-06-10 2009-10-06 Infoprint Solutions Company Llc Method and system for designing multilevel halftone screens using spot functions
US7986442B2 (en) * 2007-07-09 2011-07-26 Samsung Electronics Co., Ltd. Apparatus and method to generate a halftoning screen and image forming apparatus for same
JP4929122B2 (ja) * 2007-10-16 2012-05-09 キヤノン株式会社 画像処理装置およびその方法、並びに、プログラム
US20100027074A1 (en) * 2008-07-31 2010-02-04 Sharp Laboratories Of America, Inc. Partition halftone for multi-tone level output device
US8537424B1 (en) * 2009-08-21 2013-09-17 Marvell International Ltd. On-the-fly halftone image generation
JP5623893B2 (ja) * 2010-12-13 2014-11-12 株式会社沖データ 画像形成装置及び方法、並びにプログラム及び記録媒体

Family Cites Families (20)

* 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
JPS57142072A (en) * 1981-02-27 1982-09-02 Canon Inc Video signal processor
JPS58114570A (ja) * 1981-12-26 1983-07-07 Canon Inc 画像処理装置
US4884080A (en) * 1985-01-31 1989-11-28 Kabushiki Kaisha Toshiba Color image printing apparatus
US4969052A (en) * 1988-05-11 1990-11-06 Canon Kabushiki Kaisha Image processing method and apparatus
US5014333A (en) * 1988-07-21 1991-05-07 Eastman Kodak Company Image processor with smooth transitioning between dither and diffusion processes
GB8913680D0 (en) * 1989-06-14 1989-08-02 Crosfield Electronics Ltd Method and apparatus for generating a binary representation of an image
US5045952A (en) * 1989-08-21 1991-09-03 Xerox Corporation Method for edge enhanced error diffusion
US5287195A (en) * 1990-09-17 1994-02-15 Phoenix Technologies Ltd. Image display apparatus and method using halftone super cells
US5196942A (en) * 1990-09-17 1993-03-23 Xerox Corporation System and method for determining picture element values
EP0740458B1 (en) * 1991-02-08 2002-06-19 Adobe Systems Inc. Method of controlling dot size in digital halftoning with multi-cell threshold arrays
US5130823A (en) * 1991-06-27 1992-07-14 Cactus Error diffusion system
JP2500834B2 (ja) * 1991-09-05 1996-05-29 ゼロックス コーポレイション 画素値の量子化方法及び装置
US5226096A (en) * 1991-10-11 1993-07-06 Xerox Corporation Digital halftoning with selectively applied dot-to-dot error diffusion
US5268774A (en) * 1991-11-27 1993-12-07 Xerox Corporation Halftoning with enhanced dynamic range and edge enhanced error diffusion
US5243443A (en) * 1991-12-06 1993-09-07 Xerox Corporation Halftoning with error feedback and image dependent enhancement
US5291296A (en) * 1992-09-29 1994-03-01 Xerox Corporation Specific set of rotated screens for digital halftoning
US5287194A (en) * 1992-11-25 1994-02-15 Xerox Corporation Distributed printing
US5321525A (en) * 1992-12-14 1994-06-14 Xerox Corporation Clustered halftoning with dot-to-dot error diffusion
US5325211A (en) * 1993-01-04 1994-06-28 Xerox Corporation Error diffusion with output and input based feedback

Also Published As

Publication number Publication date
DE69616045D1 (de) 2001-11-22
US5587811A (en) 1996-12-24
WO1996034488A1 (en) 1996-10-31
EP0826284B1 (en) 2001-10-17
JPH11504476A (ja) 1999-04-20
DK0826284T3 (da) 2001-12-17
EP0826284A1 (en) 1998-03-04
DE69616045T2 (de) 2002-06-06
AU5573996A (en) 1996-11-18
EP0826284A4 (es) 1998-03-18

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