DE69617408D1 - Digitale rasterung mit spreizspektrum - Google Patents
Digitale rasterung mit spreizspektrumInfo
- Publication number
- DE69617408D1 DE69617408D1 DE69617408T DE69617408T DE69617408D1 DE 69617408 D1 DE69617408 D1 DE 69617408D1 DE 69617408 T DE69617408 T DE 69617408T DE 69617408 T DE69617408 T DE 69617408T DE 69617408 D1 DE69617408 D1 DE 69617408D1
- 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
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
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 true DE69617408D1 (de) | 2002-01-10 |
DE69617408T2 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) |
Families Citing this family (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6611607B1 (en) | 1993-11-18 | 2003-08-26 | Digimarc Corporation | Integrating digital watermarks in multimedia content |
US6408082B1 (en) | 1996-04-25 | 2002-06-18 | Digimarc Corporation | Watermark detection using a fourier mellin transform |
US6122403A (en) | 1995-07-27 | 2000-09-19 | Digimarc Corporation | Computer system linked by using information in data objects |
US5748763A (en) | 1993-11-18 | 1998-05-05 | Digimarc Corporation | Image steganography system featuring perceptually adaptive and globally scalable signal embedding |
US6614914B1 (en) | 1995-05-08 | 2003-09-02 | Digimarc Corporation | Watermark embedder and reader |
US6424725B1 (en) | 1996-05-16 | 2002-07-23 | Digimarc Corporation | Determining transformations of media signals with embedded code signals |
US7171016B1 (en) | 1993-11-18 | 2007-01-30 | Digimarc Corporation | Method for monitoring internet dissemination of image, video and/or audio files |
US6944298B1 (en) | 1993-11-18 | 2005-09-13 | Digimare Corporation | Steganographic encoding and decoding of auxiliary codes in media signals |
US6516079B1 (en) | 2000-02-14 | 2003-02-04 | Digimarc Corporation | Digital watermark screening and detecting strategies |
US6757406B2 (en) | 1993-11-18 | 2004-06-29 | Digimarc Corporation | Steganographic image processing |
US6983051B1 (en) | 1993-11-18 | 2006-01-03 | Digimarc Corporation | Methods for audio watermarking and decoding |
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 |
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 |
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 |
US6763124B2 (en) | 2000-04-19 | 2004-07-13 | Digimarc Corporation | Embedding digital watermarks in spot colors |
US6804377B2 (en) | 2000-04-19 | 2004-10-12 | Digimarc Corporation | Detecting information hidden out-of-phase in color channels |
US7738673B2 (en) | 2000-04-19 | 2010-06-15 | Digimarc Corporation | Low visible digital watermarks |
US8027509B2 (en) | 2000-04-19 | 2011-09-27 | Digimarc Corporation | Digital watermarking in data representing color channels |
US6891959B2 (en) | 2000-04-19 | 2005-05-10 | Digimarc Corporation | Hiding information out-of-phase in color channels |
US6993149B2 (en) * | 2001-09-25 | 2006-01-31 | Digimarc Corporation | Embedding digital watermarks in spot colors |
US6912295B2 (en) | 2000-04-19 | 2005-06-28 | Digimarc Corporation | Enhancing embedding of out-of-phase signals |
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 |
US7213757B2 (en) | 2001-08-31 | 2007-05-08 | Digimarc Corporation | Emerging security features for identification documents |
US7537170B2 (en) | 2001-08-31 | 2009-05-26 | Digimarc Corporation | Machine-readable security features for printed objects |
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 |
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 |
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 |
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 |
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 |
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 |
Family Cites Families (28)
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 (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 |
GB9008318D0 (en) * | 1990-04-12 | 1990-06-13 | Crosfield Electronics Ltd | Methods and apparatus for half-tone imaging |
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 |
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 |
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 |
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 (de) * | 1993-09-02 | 1997-11-12 | Agfa-Gevaert N.V. | Verfahren zur Herstellung eines frequenzmodulierten Rasterbildes |
-
1995
- 1995-03-27 US US08/410,785 patent/US5689623A/en not_active Expired - Lifetime
-
1996
- 1996-02-16 EP EP96905509A patent/EP0818106B1/de not_active Expired - Lifetime
- 1996-02-16 AT AT96905509T patent/ATE209838T1/de not_active IP Right Cessation
- 1996-02-16 CA CA002217179A patent/CA2217179A1/en not_active Abandoned
- 1996-02-16 DK DK96905509T patent/DK0818106T3/da active
- 1996-02-16 ES ES96905509T patent/ES2171220T3/es not_active Expired - Lifetime
- 1996-02-16 DE DE69617408T patent/DE69617408T2/de not_active Expired - Fee Related
- 1996-02-16 WO PCT/US1996/002035 patent/WO1996031048A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
EP0818106A1 (de) | 1998-01-14 |
WO1996031048A1 (en) | 1996-10-03 |
DE69617408T2 (de) | 2002-11-21 |
US5689623A (en) | 1997-11-18 |
CA2217179A1 (en) | 1996-10-03 |
DK0818106T3 (da) | 2002-03-11 |
ATE209838T1 (de) | 2001-12-15 |
EP0818106B1 (de) | 2001-11-28 |
ES2171220T3 (es) | 2002-09-01 |
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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 |