DE69521638D1 - Erzeugung von Mehrfachtonbildern - Google Patents
Erzeugung von MehrfachtonbildernInfo
- Publication number
- DE69521638D1 DE69521638D1 DE69521638T DE69521638T DE69521638D1 DE 69521638 D1 DE69521638 D1 DE 69521638D1 DE 69521638 T DE69521638 T DE 69521638T DE 69521638 T DE69521638 T DE 69521638T DE 69521638 D1 DE69521638 D1 DE 69521638D1
- Authority
- DE
- Germany
- Prior art keywords
- generation
- tone images
- tone
- images
- 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
- H04N1/4055—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
-
- 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)
- Facsimile Image Signal Circuits (AREA)
- Image Processing (AREA)
- Color, Gradation (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20521594A | 1994-03-02 | 1994-03-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69521638D1 true DE69521638D1 (de) | 2001-08-16 |
DE69521638T2 DE69521638T2 (de) | 2001-10-25 |
Family
ID=22761295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69521638T Expired - Fee Related DE69521638T2 (de) | 1994-03-02 | 1995-02-16 | Erzeugung von Mehrfachtonbildern |
Country Status (5)
Country | Link |
---|---|
US (1) | US5615021A (de) |
EP (1) | EP0670653B1 (de) |
JP (1) | JPH07283943A (de) |
CN (1) | CN1085000C (de) |
DE (1) | DE69521638T2 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69527675T2 (de) * | 1994-04-27 | 2003-04-03 | Agfa-Gevaert, Mortsel | Mehrstufige Halbtonrasterung mit gruppierten Punkten und Linien für den elektrografischen Farbdruck |
US5768425A (en) * | 1995-07-14 | 1998-06-16 | Texas Instruments Incorporated | Method and system for improved threshold based screening |
US5751470A (en) * | 1996-03-12 | 1998-05-12 | Lexmark International, Inc. | Method for enhanced print quality on print engines with at least one high resolution dimension |
JP4348748B2 (ja) * | 1996-07-18 | 2009-10-21 | セイコーエプソン株式会社 | 印刷装置および画像記録方法 |
US5966507A (en) * | 1997-08-25 | 1999-10-12 | Hewlett-Packard Company | Image resolution enhancement technology (IRET) for dual dye-load inkjet printer |
US6643032B1 (en) * | 1998-12-28 | 2003-11-04 | Xerox Corporation | Marking engine and method to optimize tone levels in a digital output system |
US6264300B1 (en) * | 1999-06-04 | 2001-07-24 | Lexmark International, Inc. | Methods of printing with an ink jet printer using inks with same hue and different saturation |
US6778299B2 (en) | 2001-03-09 | 2004-08-17 | Hewlett-Packard Development Company, L.P. | Error diffusion with partial dots method and system |
CN100435548C (zh) * | 2006-09-15 | 2008-11-19 | 北京大学 | 一种能够同时产生多位调频网点的方法及装置 |
EP2123017A1 (de) * | 2007-03-02 | 2009-11-25 | Marvell World Trade Ltd | Dynamisches bild-dithering |
JP4549418B2 (ja) * | 2008-03-04 | 2010-09-22 | シャープ株式会社 | 画像処理装置、画像処理方法、画像形成装置、並びに、プログラム、記録媒体 |
EP3461116B1 (de) * | 2017-09-23 | 2024-04-17 | Heidelberg Polska Sp. z o.o. | Verfahren und system für am-screening und -schutz von druckausgaben |
US12075016B1 (en) * | 2023-12-11 | 2024-08-27 | Ricoh Company, Ltd. | Reordered multibit halftone processing with a threshold array |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4455562A (en) * | 1981-08-14 | 1984-06-19 | Pitney Bowes Inc. | Control of a light emitting diode array |
JPS60240277A (ja) * | 1984-05-15 | 1985-11-29 | Fuji Xerox Co Ltd | 中間調記録方法 |
DE3609252A1 (de) | 1985-03-20 | 1986-10-02 | Canon K.K., Tokio/Tokyo | Verfahren und vorrichtung zur bildreproduktion |
US4974067A (en) * | 1986-06-06 | 1990-11-27 | Ricoh Company, Ltd. | Multi-step-digital color image reproducing method and apparatus |
US4680645A (en) * | 1986-08-25 | 1987-07-14 | Hewlett-Packard Company | Method for rendering gray scale images with variable dot sizes |
JPS63286351A (ja) * | 1987-05-19 | 1988-11-24 | Sony Corp | プリンタ装置 |
US5086484A (en) * | 1988-08-24 | 1992-02-04 | Canon Kabushiki Kaisha | Image processing apparatus with fixed or variable threshold |
US5068926A (en) * | 1989-02-10 | 1991-12-03 | Kaneyuki Suzuki | Flush toilet |
DE69026846T2 (de) * | 1989-02-10 | 1997-01-09 | Canon Kk | Bildverarbeitungsvorrichtung |
US5309526A (en) * | 1989-05-04 | 1994-05-03 | At&T Bell Laboratories | Image processing system |
JPH0380767A (ja) | 1989-08-24 | 1991-04-05 | Ricoh Co Ltd | 画像の階調記録装置 |
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 |
US5387983A (en) * | 1991-09-27 | 1995-02-07 | Minolta Camera Kabushiki Kaisha | Facsimile apparatus comprising converting means for converting binary image data into multi-value image data and image processing apparatus judging pseudo half-tone image |
US5303069A (en) * | 1991-12-19 | 1994-04-12 | Camex, Inc. | Method for producing a multitone image |
US5341224A (en) * | 1992-04-17 | 1994-08-23 | Xerox Corporation | Image processing system and method for employing adaptive scanning of halftones to provide better printable images |
JPH05336373A (ja) * | 1992-06-04 | 1993-12-17 | Toshiba Corp | 画像記録装置 |
US5278670A (en) * | 1992-12-18 | 1994-01-11 | Xerox Corporation | Content-based resolution conversion of color documents |
DE69520703T2 (de) | 1994-03-02 | 2001-08-02 | Hewlett-Packard Co. (N.D.Ges.D.Staates Delaware), Palo Alto | Erzeugung von Mehrfachtonbildern |
-
1995
- 1995-02-16 DE DE69521638T patent/DE69521638T2/de not_active Expired - Fee Related
- 1995-02-16 EP EP95300985A patent/EP0670653B1/de not_active Expired - Lifetime
- 1995-02-27 CN CN95100825A patent/CN1085000C/zh not_active Expired - Fee Related
- 1995-03-01 JP JP7065249A patent/JPH07283943A/ja active Pending
- 1995-06-02 US US08/459,143 patent/US5615021A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69521638T2 (de) | 2001-10-25 |
EP0670653A1 (de) | 1995-09-06 |
CN1085000C (zh) | 2002-05-15 |
US5615021A (en) | 1997-03-25 |
EP0670653B1 (de) | 2001-07-11 |
CN1118903A (zh) | 1996-03-20 |
JPH07283943A (ja) | 1995-10-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: HEWLETT-PACKARD DEVELOPMENT CO., L.P., HOUSTON, TE |
|
8339 | Ceased/non-payment of the annual fee |