ES2171220T3 - Barrido numerico en un espectro disperso. - Google Patents

Barrido numerico en un espectro disperso.

Info

Publication number
ES2171220T3
ES2171220T3 ES96905509T ES96905509T ES2171220T3 ES 2171220 T3 ES2171220 T3 ES 2171220T3 ES 96905509 T ES96905509 T ES 96905509T ES 96905509 T ES96905509 T ES 96905509T ES 2171220 T3 ES2171220 T3 ES 2171220T3
Authority
ES
Spain
Prior art keywords
binary
mask
digital screening
pixels
frequencies
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
ES96905509T
Other languages
English (en)
Inventor
Adam I Pinard
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.)
ECRM Inc
Original Assignee
ECRM Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23626209&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2171220(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ECRM Inc filed Critical ECRM Inc
Application granted granted Critical
Publication of ES2171220T3 publication Critical patent/ES2171220T3/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
    • H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

UNA MASCARA DE FILTRADO DIGITAL DE ESPECTRO DIFUSO Y UN METODO Y UN SISTEMA PARA FILTRAR DIGITALMENTE UNA IMAGEN DE TONO CONTINUO CON LA MASCARA DE FILTRADO DIGITAL DE ESPECTRO DIFUSO. LA MASCARA SE CARACTERIZA EN EL DOMINIO DE LAS FRECUENCIAS MEDIANTE UNA FUNCION EN MAGNITUD INDEPENDIENTE DEL ANGULO DENTRO DE UNA BANDA DE FRECUENCIAS, ENTRE UNA MINIMA FRECUENCIA Y UNA MAXIMA FRECUENCIA. LA MASCARA, ADEMAS, SE PUEDE CARACTERIZAR POR SUS PLANOS BINARIOS CON UMBRAL, EN CADA UNO DE LOS VALORES DE UNA PLURALIDAD DE VALORES UMBRALES PREDETERMINADOS. LOS PLANOS BINARIOS SE CARACTERIZAN EN EL DOMINIO DE LAS FRECUENCIAS POR MEDIO DE MAGNITUDES DISTRIBUIDAS PRIMARIAMENTE DENTRO DE LA BANDA DE FRECUENCIAS. POR CADA PLANO BINARIO, EL NUMERO DE PIXELES QUE TIENEN UNO DE LOS VALORES BINARIOS, DIVIDIDO POR EL NUMERO TOTAL DE PIXELES DEL PLANO BINARIO, ES IGUAL A UNA FRACCION, DETERMINADA POR EL VALOR UMBRAL PREDETERMINADO DEL PLANO BINARIO DIVIDIDO POR EL VALOR UMBRAL MAXIMO.
ES96905509T 1995-03-27 1996-02-16 Barrido numerico en un espectro disperso. Expired - Lifetime ES2171220T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/410,785 US5689623A (en) 1995-03-27 1995-03-27 Spread spectrum digital screening

Publications (1)

Publication Number Publication Date
ES2171220T3 true ES2171220T3 (es) 2002-09-01

Family

ID=23626209

Family Applications (1)

Application Number Title Priority Date Filing Date
ES96905509T Expired - Lifetime ES2171220T3 (es) 1995-03-27 1996-02-16 Barrido numerico en un espectro disperso.

Country Status (8)

Country Link
US (1) US5689623A (es)
EP (1) EP0818106B1 (es)
AT (1) ATE209838T1 (es)
CA (1) CA2217179A1 (es)
DE (1) DE69617408T2 (es)
DK (1) DK0818106T3 (es)
ES (1) ES2171220T3 (es)
WO (1) WO1996031048A1 (es)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6757406B2 (en) 1993-11-18 2004-06-29 Digimarc Corporation Steganographic image processing
US5748763A (en) 1993-11-18 1998-05-05 Digimarc Corporation Image steganography system featuring perceptually adaptive and globally scalable signal embedding
US6122403A (en) 1995-07-27 2000-09-19 Digimarc Corporation Computer system linked by using information in data objects
US6408082B1 (en) 1996-04-25 2002-06-18 Digimarc Corporation Watermark detection using a fourier mellin transform
US6614914B1 (en) 1995-05-08 2003-09-02 Digimarc Corporation Watermark embedder and reader
US6944298B1 (en) 1993-11-18 2005-09-13 Digimare Corporation Steganographic encoding and decoding of auxiliary codes in media signals
US6449377B1 (en) 1995-05-08 2002-09-10 Digimarc Corporation Methods and systems for watermark processing of line art images
US6424725B1 (en) 1996-05-16 2002-07-23 Digimarc Corporation Determining transformations of media signals with embedded code signals
US6516079B1 (en) 2000-02-14 2003-02-04 Digimarc Corporation Digital watermark screening and detecting strategies
US6983051B1 (en) 1993-11-18 2006-01-03 Digimarc Corporation Methods for audio watermarking and decoding
US7171016B1 (en) 1993-11-18 2007-01-30 Digimarc Corporation Method for monitoring internet dissemination of image, video and/or audio files
US6611607B1 (en) 1993-11-18 2003-08-26 Digimarc Corporation Integrating digital watermarks in multimedia content
US6763122B1 (en) 1999-11-05 2004-07-13 Tony Rodriguez Watermarking an image in color plane separations and detecting such watermarks
US6973197B2 (en) * 1999-11-05 2005-12-06 Digimarc Corporation Watermarking with separate application of the grid and payload signals
US7039214B2 (en) 1999-11-05 2006-05-02 Digimarc Corporation Embedding watermark components during separate printing stages
US7486799B2 (en) 1995-05-08 2009-02-03 Digimarc Corporation Methods for monitoring audio and images on the internet
US6718046B2 (en) 1995-05-08 2004-04-06 Digimarc Corporation Low visibility watermark using time decay fluorescence
US6763123B2 (en) 1995-05-08 2004-07-13 Digimarc Corporation Detection of out-of-phase low visibility watermarks
US6721440B2 (en) 1995-05-08 2004-04-13 Digimarc Corporation Low visibility watermarks using an out-of-phase color
US6381341B1 (en) 1996-05-16 2002-04-30 Digimarc Corporation Watermark encoding method exploiting biases inherent in original signal
US6707572B1 (en) * 1997-09-12 2004-03-16 Tesseron, Ltd. Filtering method to reduce pixel density
JP3400316B2 (ja) * 1997-10-03 2003-04-28 富士写真フイルム株式会社 網点画像データの修正方法およびその装置、網点閾値データの修正方法
JP3427026B2 (ja) * 1999-12-24 2003-07-14 大日本スクリーン製造株式会社 網点形成方法および装置
US6891959B2 (en) 2000-04-19 2005-05-10 Digimarc Corporation Hiding information out-of-phase in color channels
US8027509B2 (en) 2000-04-19 2011-09-27 Digimarc Corporation Digital watermarking in data representing color channels
US6763124B2 (en) 2000-04-19 2004-07-13 Digimarc Corporation Embedding digital watermarks in spot colors
US7027614B2 (en) 2000-04-19 2006-04-11 Digimarc Corporation Hiding information to reduce or offset perceptible artifacts
US6912295B2 (en) 2000-04-19 2005-06-28 Digimarc Corporation Enhancing embedding of out-of-phase signals
US6993149B2 (en) * 2001-09-25 2006-01-31 Digimarc Corporation Embedding digital watermarks in spot colors
US7738673B2 (en) 2000-04-19 2010-06-15 Digimarc Corporation Low visible digital watermarks
US6804377B2 (en) 2000-04-19 2004-10-12 Digimarc Corporation Detecting information hidden out-of-phase in color channels
US7072487B2 (en) * 2001-01-26 2006-07-04 Digimarc Corporation Watermark detection using adaptive color projections
US8094869B2 (en) 2001-07-02 2012-01-10 Digimarc Corporation Fragile and emerging digital watermarks
US7537170B2 (en) 2001-08-31 2009-05-26 Digimarc Corporation Machine-readable security features for printed objects
US7213757B2 (en) 2001-08-31 2007-05-08 Digimarc Corporation Emerging security features for identification documents
US6817530B2 (en) 2001-12-18 2004-11-16 Digimarc Id Systems Multiple image security features for identification documents and methods of making same
US7824029B2 (en) 2002-05-10 2010-11-02 L-1 Secure Credentialing, Inc. Identification card printer-assembler for over the counter card issuing
JP2005252893A (ja) * 2004-03-05 2005-09-15 Fuji Photo Film Co Ltd 閾値マトリクス
JP2005286999A (ja) * 2004-03-05 2005-10-13 Fuji Photo Film Co Ltd 閾値マトリクスの割当方法
JP4143560B2 (ja) * 2004-03-05 2008-09-03 富士フイルム株式会社 閾値マトリクスの作成方法及びその装置
JP2005252888A (ja) * 2004-03-05 2005-09-15 Fuji Photo Film Co Ltd 閾値マトリクスの作成方法及びその閾値マトリクス並びにカラー画像の再現方法
JP4241632B2 (ja) * 2005-01-25 2009-03-18 富士フイルム株式会社 色版作成用閾値マトリクスの作成方法、カラー画像の再現方法、カラー画像分版作成装置及び閾値マトリクス
JP4568690B2 (ja) * 2006-03-17 2010-10-27 株式会社リコー 黒レベルフィードバック装置、画像読取装置および黒レベルフィードバック制御方法
US7817876B2 (en) * 2006-04-12 2010-10-19 Etron Technology, Inc. Method of noisy signal analysis and apparatus thereof
US20090034008A1 (en) * 2007-08-03 2009-02-05 Lawrence Croft Method for generating stochastic dither matrix
US20090034006A1 (en) * 2007-08-03 2009-02-05 Blondal Daniel J Stochastic halftone images based on screening parameters
US8199149B2 (en) * 2007-12-13 2012-06-12 Tektronix, Inc. Automatic generation of frequency domain mask
US9117268B2 (en) 2008-12-17 2015-08-25 Digimarc Corporation Out of phase digital watermarking in two chrominance directions
US8199969B2 (en) 2008-12-17 2012-06-12 Digimarc Corporation Out of phase digital watermarking in two chrominance directions
US8824000B2 (en) 2012-05-22 2014-09-02 Eastman Kodak Company Enhancing the appearance of a halftone image
US8842341B2 (en) 2012-05-22 2014-09-23 Eastman Kodak Company Rescreeining selected parts of a halftone image

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413286A (en) * 1981-08-24 1983-11-01 Optronics International, Inc. Method and apparatus involving digital screen generation
US4425642A (en) * 1982-01-08 1984-01-10 Applied Spectrum Technologies, Inc. Simultaneous transmission of two information signals within a band-limited communications channel
JPS60113582A (ja) * 1983-11-24 1985-06-20 Ricoh Co Ltd 中間調画像処理方法
JPS60165873A (ja) * 1984-02-09 1985-08-29 Dainippon Screen Mfg Co Ltd 網点発生器のアドレス発生方法
DE3437063A1 (de) * 1984-10-09 1986-04-17 Siemens AG, 1000 Berlin und 8000 München Verfahren und anordnung zur darstellung eines halbtonbildes unter verwendung eines detektionsangepassten rasters
US4736254A (en) * 1984-11-22 1988-04-05 Matsushita Electric Industrial Co., Ltd. Method and apparatus for generating pseudo-halftone dots by comparing gray scale values of an original with dither threshold values stored in cells of a matrix array divided into imaginary matrices of elemental areas each containing one cell
US4941185A (en) * 1985-03-18 1990-07-10 Crosfield Electronics Image processing
US4800442A (en) * 1985-08-15 1989-01-24 Canon Kabushiki Kaisha Apparatus for generating an image from a digital video signal
JPH0771238B2 (ja) * 1986-09-24 1995-07-31 株式会社日立製作所 固体撮像装置
GB8628238D0 (en) * 1986-11-26 1986-12-31 Crosfield Electronics Ltd Generating half-tone representations
JPH0626440B2 (ja) * 1987-05-26 1994-04-06 大日本スクリ−ン製造株式会社 網点作成装置
US4800443A (en) * 1987-08-14 1989-01-24 Tektronix, Inc. Method and apparatus for carrying out a dithering operation
US4920501A (en) * 1988-10-19 1990-04-24 Eastman Kodak Company Digital halftoning with minimum visual modulation patterns
US4912569A (en) * 1989-01-24 1990-03-27 Eastman Kodak Company Method for thresholding an image signal
US5309526A (en) * 1989-05-04 1994-05-03 At&T Bell Laboratories Image processing system
IL91054A0 (es) * 1989-07-20 1990-02-09
US5274473A (en) * 1989-08-04 1993-12-28 Intergraph Corporation Rapid variable angle digital screening
US5070413A (en) * 1989-10-10 1991-12-03 Eastman Kodak Company Color digital halftoning with vector error diffusion
US5198910A (en) * 1989-12-14 1993-03-30 Eastman Kodak Company Mixed matrix image processing for rendering halftone images with variable dot sizes
US5214517A (en) * 1990-02-07 1993-05-25 Eastman Kodak Company Digital halftoning with correlated minimum visual modulation patterns
GB9008318D0 (en) * 1990-04-12 1990-06-13 Crosfield Electronics Ltd Methods and apparatus for half-tone imaging
US5079721A (en) * 1990-05-18 1992-01-07 Scitex Corporation Ltd. Apparatus for generating a screened reproduction of an image
US5150225A (en) * 1990-05-18 1992-09-22 Scitex Corporation Ltd. Apparatus for generating a screened reproduction of an image
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
US5111310A (en) * 1990-12-04 1992-05-05 Research Technologies Corporation, Inc. Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
JPH04219067A (ja) * 1990-12-19 1992-08-10 Canon Inc 画像処理方法
JP2750226B2 (ja) * 1991-02-19 1998-05-13 大日本スクリーン製造株式会社 二値化閾値の設定方法
EP0642258B1 (en) * 1993-09-02 1997-11-12 Agfa-Gevaert N.V. Method for generating a frequency modulated halftone image

Also Published As

Publication number Publication date
WO1996031048A1 (en) 1996-10-03
DK0818106T3 (da) 2002-03-11
CA2217179A1 (en) 1996-10-03
US5689623A (en) 1997-11-18
EP0818106A1 (en) 1998-01-14
ATE209838T1 (de) 2001-12-15
DE69617408T2 (de) 2002-11-21
DE69617408D1 (de) 2002-01-10
EP0818106B1 (en) 2001-11-28

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