DE69617408T2 - Digitale rasterung mit spreizspektrum - Google Patents

Digitale rasterung mit spreizspektrum

Info

Publication number
DE69617408T2
DE69617408T2 DE69617408T DE69617408T DE69617408T2 DE 69617408 T2 DE69617408 T2 DE 69617408T2 DE 69617408 T DE69617408 T DE 69617408T DE 69617408 T DE69617408 T DE 69617408T DE 69617408 T2 DE69617408 T2 DE 69617408T2
Authority
DE
Germany
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 - Fee Related
Application number
DE69617408T
Other languages
English (en)
Other versions
DE69617408D1 (de
Inventor
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=DE69617408(T2) "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 DE69617408D1 publication Critical patent/DE69617408D1/de
Publication of DE69617408T2 publication Critical patent/DE69617408T2/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
    • H04N1/405—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
DE69617408T 1995-03-27 1996-02-16 Digitale rasterung mit spreizspektrum Expired - Fee Related DE69617408T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/410,785 US5689623A (en) 1995-03-27 1995-03-27 Spread spectrum digital screening
PCT/US1996/002035 WO1996031048A1 (en) 1995-03-27 1996-02-16 Spread spectrum digital screening

Publications (2)

Publication Number Publication Date
DE69617408D1 DE69617408D1 (de) 2002-01-10
DE69617408T2 true DE69617408T2 (de) 2002-11-21

Family

ID=23626209

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69617408T Expired - Fee Related DE69617408T2 (de) 1995-03-27 1996-02-16 Digitale rasterung mit spreizspektrum

Country Status (8)

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

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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
US5748763A (en) 1993-11-18 1998-05-05 Digimarc Corporation Image steganography system featuring perceptually adaptive and globally scalable signal embedding
US7171016B1 (en) 1993-11-18 2007-01-30 Digimarc Corporation Method for monitoring internet dissemination of image, video and/or audio files
US6614914B1 (en) 1995-05-08 2003-09-02 Digimarc Corporation Watermark embedder and reader
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US6122403A (en) 1995-07-27 2000-09-19 Digimarc Corporation Computer system linked by using information in data objects
US6973197B2 (en) * 1999-11-05 2005-12-06 Digimarc Corporation Watermarking with separate application of the grid and payload signals
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US6721440B2 (en) 1995-05-08 2004-04-13 Digimarc Corporation Low visibility watermarks using an out-of-phase color
US6718046B2 (en) 1995-05-08 2004-04-06 Digimarc Corporation Low visibility watermark using time decay fluorescence
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
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
US6763124B2 (en) 2000-04-19 2004-07-13 Digimarc Corporation Embedding digital watermarks in spot colors
US8027509B2 (en) 2000-04-19 2011-09-27 Digimarc Corporation Digital watermarking in data representing color channels
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
DK1456810T3 (da) 2001-12-18 2011-07-18 L 1 Secure Credentialing Inc Multiple billedsikkerhedstræk til at identificere dokumenter og fremgangsmåder til fremstilling deraf
US7824029B2 (en) 2002-05-10 2010-11-02 L-1 Secure Credentialing, Inc. Identification card printer-assembler for over the counter card issuing
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
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
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
JP2005252893A (ja) * 2004-03-05 2005-09-15 Fuji Photo Film Co Ltd 閾値マトリクス
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
US8199969B2 (en) 2008-12-17 2012-06-12 Digimarc Corporation Out of phase digital watermarking in two chrominance directions
US9117268B2 (en) 2008-12-17 2015-08-25 Digimarc Corporation Out of phase digital watermarking in two chrominance directions
US8842341B2 (en) 2012-05-22 2014-09-23 Eastman Kodak Company Rescreeining selected parts of a halftone image
US8824000B2 (en) * 2012-05-22 2014-09-02 Eastman Kodak Company Enhancing the appearance of a halftone image

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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 (de) * 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
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US5150225A (en) * 1990-05-18 1992-09-22 Scitex Corporation Ltd. Apparatus for generating a screened reproduction of an image
US5079721A (en) * 1990-05-18 1992-01-07 Scitex Corporation Ltd. Apparatus for generating a screened reproduction of an image
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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
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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 (de) * 1993-09-02 1997-11-12 Agfa-Gevaert N.V. Verfahren zur Herstellung eines frequenzmodulierten Rasterbildes

Also Published As

Publication number Publication date
DK0818106T3 (da) 2002-03-11
US5689623A (en) 1997-11-18
EP0818106A1 (de) 1998-01-14
EP0818106B1 (de) 2001-11-28
DE69617408D1 (de) 2002-01-10
ES2171220T3 (es) 2002-09-01
ATE209838T1 (de) 2001-12-15
CA2217179A1 (en) 1996-10-03
WO1996031048A1 (en) 1996-10-03

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: ECRM INC., TEWKSBURY, MASS., US

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee