DE3785558D1 - Geraet zur verarbeitung von signalen fuer die anzeige von bildern mit zwei pegeln. - Google Patents
Geraet zur verarbeitung von signalen fuer die anzeige von bildern mit zwei pegeln.Info
- Publication number
- DE3785558D1 DE3785558D1 DE8787311205T DE3785558T DE3785558D1 DE 3785558 D1 DE3785558 D1 DE 3785558D1 DE 8787311205 T DE8787311205 T DE 8787311205T DE 3785558 T DE3785558 T DE 3785558T DE 3785558 D1 DE3785558 D1 DE 3785558D1
- Authority
- DE
- Germany
- Prior art keywords
- images
- levels
- display
- processing signals
- signals
- 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 - Lifetime
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
- H04N1/4052—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 by error diffusion, i.e. transferring the binarising error to neighbouring dot decisions
-
- 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
- H04N1/4052—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 by error diffusion, i.e. transferring the binarising error to neighbouring dot decisions
- H04N1/4053—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 by error diffusion, i.e. transferring the binarising error to neighbouring dot decisions with threshold modulated relative to input image data or vice versa
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61304249A JPH0666876B2 (ja) | 1986-12-19 | 1986-12-19 | 画像信号処理装置 |
JP61304198A JPH0681257B2 (ja) | 1986-12-19 | 1986-12-19 | 画像信号処理装置 |
JP61304248A JPH0722334B2 (ja) | 1986-12-19 | 1986-12-19 | 画像信号処理装置 |
JP61304243A JPH06105953B2 (ja) | 1986-12-19 | 1986-12-19 | 画像信号処理装置 |
JP62045577A JPH0793682B2 (ja) | 1987-02-27 | 1987-02-27 | 画像信号処理装置 |
JP62175171A JPS6418369A (en) | 1987-07-14 | 1987-07-14 | Picture signal processor |
Publications (3)
Publication Number | Publication Date |
---|---|
DE3785558D1 true DE3785558D1 (de) | 1993-05-27 |
DE3785558T2 DE3785558T2 (de) | 1993-10-14 |
DE3785558T3 DE3785558T3 (de) | 1997-04-10 |
Family
ID=27550193
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3752022T Expired - Lifetime DE3752022T2 (de) | 1986-12-19 | 1987-12-18 | Gerät zur Verarbeitung von Signalen für die Anzeige von Bildern mit zwei Pegeln |
DE3751916T Expired - Lifetime DE3751916D1 (de) | 1986-12-19 | 1987-12-18 | Gerät zur Verarbeitung von Signalen für die Anzeige von Bildern mit zwei Pegeln |
DE3785558T Expired - Lifetime DE3785558T3 (de) | 1986-12-19 | 1987-12-18 | Gerät zur Verarbeitung von Signalen für die Anzeige von Bildern mit zwei Pegeln. |
DE3751957T Expired - Lifetime DE3751957T2 (de) | 1986-12-19 | 1987-12-18 | Gerät zur Verarbeitung von Signalen für die Anzeige von Bildern mit zwei Pegeln |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3752022T Expired - Lifetime DE3752022T2 (de) | 1986-12-19 | 1987-12-18 | Gerät zur Verarbeitung von Signalen für die Anzeige von Bildern mit zwei Pegeln |
DE3751916T Expired - Lifetime DE3751916D1 (de) | 1986-12-19 | 1987-12-18 | Gerät zur Verarbeitung von Signalen für die Anzeige von Bildern mit zwei Pegeln |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3751957T Expired - Lifetime DE3751957T2 (de) | 1986-12-19 | 1987-12-18 | Gerät zur Verarbeitung von Signalen für die Anzeige von Bildern mit zwei Pegeln |
Country Status (3)
Country | Link |
---|---|
US (1) | US4891710A (de) |
EP (4) | EP0507356B1 (de) |
DE (4) | DE3752022T2 (de) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4969052A (en) * | 1988-05-11 | 1990-11-06 | Canon Kabushiki Kaisha | Image processing method and apparatus |
US5086484A (en) * | 1988-08-24 | 1992-02-04 | Canon Kabushiki Kaisha | Image processing apparatus with fixed or variable threshold |
JP2791066B2 (ja) * | 1988-11-15 | 1998-08-27 | キヤノン株式会社 | 記録装置 |
US5201013A (en) * | 1989-04-24 | 1993-04-06 | Ezel, Inc. | Dither processing method |
JPH03131173A (ja) * | 1989-10-17 | 1991-06-04 | Canon Inc | 画像処理方式 |
US5050000A (en) * | 1990-05-21 | 1991-09-17 | Eastman Kodak Company | Error diffusion of subcells in digital halftoning |
US5172247A (en) * | 1990-10-24 | 1992-12-15 | Eastman Kodak Company | High speed digital error diffusion process for continuous tone image-to-binary image conversion |
JP2871127B2 (ja) * | 1991-01-30 | 1999-03-17 | 三菱電機株式会社 | 画像処理装置及び方法 |
US5210602A (en) * | 1991-02-25 | 1993-05-11 | International Business Machines Corporation | Coupled-color error diffusion |
US5260807A (en) * | 1992-06-05 | 1993-11-09 | Eastman Kodak Company | Method and apparatus for imbedding controlled structure for gray scale rendering |
AU674552B2 (en) * | 1993-01-11 | 1997-01-02 | Canon Kabushiki Kaisha | Parallel error diffusion method and apparatus |
US5553165A (en) * | 1993-01-11 | 1996-09-03 | Canon, Inc. | Parallel error diffusion method and apparatus |
JPH0738767A (ja) * | 1993-07-19 | 1995-02-07 | Canon Inc | 画像2値化処理装置 |
US5353127A (en) * | 1993-12-15 | 1994-10-04 | Xerox Corporation | Method for quantization gray level pixel data with extended distribution set |
US5621542A (en) * | 1994-01-20 | 1997-04-15 | Canon Kabushiki Kaisha | Image processing apparatus and method with weighting of error data generated in quantization |
US5696601A (en) * | 1994-08-03 | 1997-12-09 | Xerox Corporation | System and method for redistributing error values from an error diffusion process |
US5675716A (en) * | 1994-10-11 | 1997-10-07 | Seiko Epson Corporation | Method and apparatus for vivid color correction in binary printing devices |
JPH08237483A (ja) * | 1994-12-01 | 1996-09-13 | Xerox Corp | イメージデータを処理するためのシステム及び方法 |
US5710836A (en) * | 1994-12-01 | 1998-01-20 | Xerox Corporation | System and apparatus for tonal reproduction adjustment in an error diffusion process |
JP3242278B2 (ja) * | 1995-03-24 | 2001-12-25 | 東芝テック株式会社 | 画像処理装置 |
US5805738A (en) * | 1995-12-21 | 1998-09-08 | Canon Kabushiki Kaisha | Image processing apparatus and method |
US5689588A (en) * | 1996-01-03 | 1997-11-18 | Eastman Kodak Company | Method and apparatus for increasing compressibility of multibit image data with the LSB value determined in the thresholding operation based on pixel position |
AUPN743096A0 (en) * | 1996-01-05 | 1996-02-01 | Canon Kabushiki Kaisha | Force field halftoning |
US5787206A (en) * | 1996-05-30 | 1998-07-28 | Xerox Corporation | Method and system for processing image information using expanded dynamic screening and error diffusion |
US5822464A (en) * | 1996-05-30 | 1998-10-13 | Xerox Corporation | Method and system for processing image information using video dependent dampened screening and error diffusion |
US5974228A (en) * | 1997-01-28 | 1999-10-26 | Hewlett-Packard Company | Image rendition by plural-row error diffusion, for faster operation and smaller integrated circuits |
JP2001128003A (ja) * | 1999-10-29 | 2001-05-11 | Matsushita Electric Ind Co Ltd | 画像二値化方法 |
JP2002185788A (ja) * | 2000-10-06 | 2002-06-28 | Seiko Epson Corp | 画像処理装置、画像処理方法、印刷制御装置、および記録媒体 |
JP3708465B2 (ja) * | 2001-01-22 | 2005-10-19 | 松下電器産業株式会社 | 画像処理方法および画像処理用プログラム |
US6995868B2 (en) | 2001-06-29 | 2006-02-07 | Hewlett-Packard Development Company, L.P. | Halftoning algorithm adapted to prevent unaesthetic output |
US8009327B2 (en) * | 2002-07-11 | 2011-08-30 | Canon Kabushiki Kaisha | Method and apparatus for image processing |
JP4105704B2 (ja) * | 2004-05-18 | 2008-06-25 | シャープ株式会社 | 画像処理装置、画像形成装置、画像処理方法、プログラム、および記録媒体 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1415520A (en) * | 1970-06-15 | 1975-11-26 | British Broadcasting Corp | Transmission of digital information |
JPS4883724A (de) * | 1972-02-08 | 1973-11-08 | ||
JPS4883723A (de) * | 1972-02-08 | 1973-11-08 | ||
JPS5646364A (en) * | 1979-09-10 | 1981-04-27 | Xerox Corp | Digital convertion in white and black image |
DE3067060D1 (en) * | 1979-12-20 | 1984-04-19 | Cambridge Consultants | Apparatus and method for generating a dispersed dot half tone picture from a continuous tone picture |
US4449150A (en) * | 1981-01-19 | 1984-05-15 | Ricoh Company, Ltd. | Method of processing medium tone picture |
EP0174721B1 (de) * | 1984-07-25 | 1991-07-17 | Matsushita Electric Industrial Co., Ltd. | Bildsignalverarbeitungsgerät |
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 |
-
1987
- 1987-12-18 EP EP92110386A patent/EP0507356B1/de not_active Expired - Lifetime
- 1987-12-18 EP EP92110355A patent/EP0512578B1/de not_active Expired - Lifetime
- 1987-12-18 EP EP87311205A patent/EP0272147B2/de not_active Expired - Lifetime
- 1987-12-18 EP EP92110032A patent/EP0507354B1/de not_active Expired - Lifetime
- 1987-12-18 DE DE3752022T patent/DE3752022T2/de not_active Expired - Lifetime
- 1987-12-18 DE DE3751916T patent/DE3751916D1/de not_active Expired - Lifetime
- 1987-12-18 DE DE3785558T patent/DE3785558T3/de not_active Expired - Lifetime
- 1987-12-18 DE DE3751957T patent/DE3751957T2/de not_active Expired - Lifetime
- 1987-12-21 US US07/136,486 patent/US4891710A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0272147B1 (de) | 1993-04-21 |
EP0272147A3 (en) | 1989-10-25 |
DE3751957D1 (de) | 1997-01-02 |
EP0512578A3 (en) | 1993-07-14 |
EP0507356B1 (de) | 1997-02-26 |
EP0512578B1 (de) | 1996-11-20 |
DE3751916D1 (de) | 1996-10-24 |
EP0507356A3 (en) | 1993-07-14 |
US4891710A (en) | 1990-01-02 |
DE3752022T2 (de) | 1997-06-26 |
DE3785558T3 (de) | 1997-04-10 |
EP0512578A2 (de) | 1992-11-11 |
DE3751957T2 (de) | 1997-04-03 |
EP0507354B1 (de) | 1996-09-18 |
EP0507354A2 (de) | 1992-10-07 |
EP0272147A2 (de) | 1988-06-22 |
EP0272147B2 (de) | 1996-11-06 |
DE3785558T2 (de) | 1993-10-14 |
EP0507354A3 (en) | 1993-07-14 |
DE3752022D1 (de) | 1997-04-03 |
EP0507356A2 (de) | 1992-10-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8363 | Opposition against the patent | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8366 | Restricted maintained after opposition proceedings |