ATE121581T1 - Digitale photographische halbtonbildreproduktion. - Google Patents
Digitale photographische halbtonbildreproduktion.Info
- Publication number
- ATE121581T1 ATE121581T1 AT91300963T AT91300963T ATE121581T1 AT E121581 T1 ATE121581 T1 AT E121581T1 AT 91300963 T AT91300963 T AT 91300963T AT 91300963 T AT91300963 T AT 91300963T AT E121581 T1 ATE121581 T1 AT E121581T1
- Authority
- AT
- Austria
- Prior art keywords
- techniques
- image
- adaptive
- image reproduction
- halftone image
- Prior art date
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
- H04N1/4057—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 the pattern being a mixture of differently sized sub-patterns, e.g. spots having only a few different diameters
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Processing (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Facsimile Image Signal Circuits (AREA)
- Holo Graphy (AREA)
- Television Signal Processing For Recording (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/476,060 US5055942A (en) | 1990-02-06 | 1990-02-06 | Photographic image reproduction device using digital halftoning to screen images allowing adjustable coarseness |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE121581T1 true ATE121581T1 (de) | 1995-05-15 |
Family
ID=23890343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT91300963T ATE121581T1 (de) | 1990-02-06 | 1991-02-06 | Digitale photographische halbtonbildreproduktion. |
Country Status (5)
Country | Link |
---|---|
US (2) | US5055942A (de) |
EP (1) | EP0441608B1 (de) |
JP (1) | JPH04213964A (de) |
AT (1) | ATE121581T1 (de) |
DE (1) | DE69108951T2 (de) |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3838730C2 (de) | 1987-11-16 | 1994-07-28 | Canon Kk | Verfahren und Vorrichtung zur Bildverarbeitung |
US6134355A (en) * | 1989-02-10 | 2000-10-17 | Canon Kabushiki Kaisha | Binarization using a local average, and using error diffusion |
US5463472A (en) * | 1991-02-22 | 1995-10-31 | At&T Corp. | Model-based halftoning |
US5337162A (en) * | 1991-06-30 | 1994-08-09 | Ricoh Company, Ltd. | Image processing apparatus for preventing occurrence of moire in output image |
US5268774A (en) * | 1991-11-27 | 1993-12-07 | Xerox Corporation | Halftoning with enhanced dynamic range and edge enhanced error diffusion |
US5331429A (en) * | 1992-02-07 | 1994-07-19 | Levien Raphael L | Digital generation of halftone images with error diffusion and frequency matched periodic screen rulings |
US5260807A (en) * | 1992-06-05 | 1993-11-09 | Eastman Kodak Company | Method and apparatus for imbedding controlled structure for gray scale rendering |
US5473439A (en) * | 1992-10-23 | 1995-12-05 | At&T Corp. | Model-based halftoning of color images |
US5917614A (en) * | 1992-11-30 | 1999-06-29 | Levien; Raphael L | Method and apparatus for error diffusion screening of images with improved smoothness in highlight and shadow regions |
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 |
US5621546A (en) * | 1993-11-02 | 1997-04-15 | Xerox Corporation | Method and apparatus for vector error diffusion with output color control |
US5353127A (en) * | 1993-12-15 | 1994-10-04 | Xerox Corporation | Method for quantization gray level pixel data with extended distribution set |
US5446561A (en) * | 1994-03-08 | 1995-08-29 | Eastman Kodak Company | Method and apparatus for digital scale halftoning with variable screen structure for electrophotographic printing devices |
US5535019A (en) * | 1994-09-15 | 1996-07-09 | Xerox Corporation | Error diffusion halftoning with homogeneous response in high/low intensity image regions |
US5594839A (en) * | 1994-10-17 | 1997-01-14 | Seiko Epson Corporation | Apparatus and method for improving black and color separation in halftoned images by printing black dots in a different screen phase |
US5493416A (en) * | 1994-10-31 | 1996-02-20 | Xerox Corporation | Method combining error diffusion and traditional halftoning with arbitrary screen orientation |
JPH08204971A (ja) * | 1994-10-31 | 1996-08-09 | Xerox Corp | 予測符号化と誤差拡散を用いた画像圧縮方法 |
SE9504016L (sv) * | 1995-11-13 | 1997-05-14 | Forskarpatent I Linkoeping Ab | Rastreringsförfarande |
US5668638A (en) * | 1996-06-27 | 1997-09-16 | Xerox Corporation | Error diffusion method with symmetric enhancement |
US5701366A (en) * | 1996-09-04 | 1997-12-23 | Canon Information Systems, Inc. | Halftoning with gradient-based selection of dither matrices |
US6006011A (en) * | 1997-09-03 | 1999-12-21 | International Business Machines Corporation | Target patterns controlled error management |
US5946455A (en) * | 1997-10-02 | 1999-08-31 | International Business Machines Corporation | Model based error diffusion with correction propagation |
US6493112B1 (en) | 1998-01-16 | 2002-12-10 | University Of Delaware | Method and apparatus for producing halftone images using green-noise masks having adjustable coarseness |
US6160921A (en) * | 1998-06-15 | 2000-12-12 | Apple Computer, Inc. | Error diffusion with homogeneous distribution in highlight and shadow regions |
US6798537B1 (en) | 1999-01-27 | 2004-09-28 | The University Of Delaware | Digital color halftoning with generalized error diffusion vector green-noise masks |
US6678073B1 (en) | 2000-02-08 | 2004-01-13 | Oak Technology, Inc. | Error diffusion method and apparatus |
US7161634B2 (en) * | 2003-03-06 | 2007-01-09 | Huaya Microelectronics, Ltd. | Encoding system for error diffusion dithering |
US8576447B2 (en) * | 2003-10-31 | 2013-11-05 | Hewlett-Packard Development Company, L.P. | Error diffusion halftoning with bandpass noise shaping |
US7420708B2 (en) | 2003-12-19 | 2008-09-02 | Xerox Corporation | Method for processing color image data employing a stamp field |
US7317556B2 (en) * | 2003-12-19 | 2008-01-08 | Xerox Corporation | Method for error diffusion employing a stamp field |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US498127A (en) * | 1893-05-23 | Screen for making photomechanical printing-plates | ||
US1790722A (en) * | 1931-02-03 | Duplex photomointlatob | ||
GB1495499A (en) * | 1974-01-30 | 1977-12-21 | Crosfield Electronics Ltd | Image reproduction systems |
US4933776A (en) * | 1983-01-24 | 1990-06-12 | Canon Kabushiki Kaisha | Image processing method and apparatus therefor |
JPS6062779A (ja) * | 1983-08-31 | 1985-04-10 | Nec Corp | インクジェット記録方法 |
US4633327A (en) * | 1983-11-10 | 1986-12-30 | Xerox Corporation | Enhancement halftoning |
US4574357A (en) * | 1984-02-21 | 1986-03-04 | Pitney Bowes Inc. | Real time character thinning system |
US4651287A (en) * | 1984-06-14 | 1987-03-17 | Tsao Sherman H | Digital image processing algorithm for output devices with discrete halftone gray scale capability |
US4707745A (en) * | 1984-12-20 | 1987-11-17 | Ricoh Company, Ltd. | Digital copier with document image region decision device |
US4654721A (en) * | 1985-04-12 | 1987-03-31 | International Business Machines Corporation | System for reproducing multi-level digital images on a bi-level printer of fixed dot size |
JPS6229372A (ja) * | 1985-07-31 | 1987-02-07 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | 2値デ−タの圧縮方法 |
JPS62118676A (ja) * | 1985-11-18 | 1987-05-30 | Sharp Corp | 画像処理方式 |
US4680645A (en) * | 1986-08-25 | 1987-07-14 | Hewlett-Packard Company | Method for rendering gray scale images with variable dot sizes |
DE3838730C2 (de) * | 1987-11-16 | 1994-07-28 | Canon Kk | Verfahren und Vorrichtung zur Bildverarbeitung |
JP2796718B2 (ja) * | 1988-08-23 | 1998-09-10 | 株式会社ヤマトヤ商会 | 画像の階調変換方法 |
US5268774A (en) * | 1991-11-27 | 1993-12-07 | Xerox Corporation | Halftoning with enhanced dynamic range and edge enhanced error diffusion |
US5321525A (en) * | 1992-12-14 | 1994-06-14 | Xerox Corporation | Clustered halftoning with dot-to-dot error diffusion |
-
1990
- 1990-02-06 US US07/476,060 patent/US5055942A/en not_active Expired - Lifetime
-
1991
- 1991-02-06 AT AT91300963T patent/ATE121581T1/de active
- 1991-02-06 JP JP3015257A patent/JPH04213964A/ja active Pending
- 1991-02-06 EP EP91300963A patent/EP0441608B1/de not_active Expired - Lifetime
- 1991-02-06 DE DE69108951T patent/DE69108951T2/de not_active Expired - Fee Related
-
1994
- 1994-01-19 US US08/183,694 patent/USRE37907E1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0441608A2 (de) | 1991-08-14 |
DE69108951T2 (de) | 1995-10-05 |
USRE37907E1 (en) | 2002-11-19 |
DE69108951D1 (de) | 1995-05-24 |
US5055942A (en) | 1991-10-08 |
EP0441608A3 (en) | 1992-11-25 |
EP0441608B1 (de) | 1995-04-19 |
JPH04213964A (ja) | 1992-08-05 |
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