ATE209838T1 - Digitale rasterung mit spreizspektrum - Google Patents

Digitale rasterung mit spreizspektrum

Info

Publication number
ATE209838T1
ATE209838T1 AT96905509T AT96905509T ATE209838T1 AT E209838 T1 ATE209838 T1 AT E209838T1 AT 96905509 T AT96905509 T AT 96905509T AT 96905509 T AT96905509 T AT 96905509T AT E209838 T1 ATE209838 T1 AT E209838T1
Authority
AT
Austria
Prior art keywords
binary
mask
spread spectrum
digital screening
pixels
Prior art date
Application number
AT96905509T
Other languages
English (en)
Inventor
Adam I Pinard
Original Assignee
Optronics Internat 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
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=ATE209838(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Optronics Internat Corp filed Critical Optronics Internat Corp
Application granted granted Critical
Publication of ATE209838T1 publication Critical patent/ATE209838T1/de

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)
AT96905509T 1995-03-27 1996-02-16 Digitale rasterung mit spreizspektrum ATE209838T1 (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 (1)

Publication Number Publication Date
ATE209838T1 true ATE209838T1 (de) 2001-12-15

Family

ID=23626209

Family Applications (1)

Application Number Title Priority Date Filing Date
AT96905509T ATE209838T1 (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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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
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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
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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
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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

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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
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GB8628238D0 (en) * 1986-11-26 1986-12-31 Crosfield Electronics Ltd Generating half-tone representations
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Also Published As

Publication number Publication date
ES2171220T3 (es) 2002-09-01
WO1996031048A1 (en) 1996-10-03
DK0818106T3 (da) 2002-03-11
CA2217179A1 (en) 1996-10-03
US5689623A (en) 1997-11-18
EP0818106A1 (de) 1998-01-14
DE69617408T2 (de) 2002-11-21
DE69617408D1 (de) 2002-01-10
EP0818106B1 (de) 2001-11-28

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