IL98004A - Apparatus and method for descreening - Google Patents
Apparatus and method for descreeningInfo
- Publication number
- IL98004A IL98004A IL9800491A IL9800491A IL98004A IL 98004 A IL98004 A IL 98004A IL 9800491 A IL9800491 A IL 9800491A IL 9800491 A IL9800491 A IL 9800491A IL 98004 A IL98004 A IL 98004A
- Authority
- IL
- Israel
- Prior art keywords
- tone image
- descreening
- image
- resolution changes
- filters
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
- G06T3/4007—Scaling of whole images or parts thereof, e.g. expanding or contracting based on interpolation, e.g. bilinear interpolation
-
- 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
- H04N1/40075—Descreening, i.e. converting a halftone signal into a corresponding continuous-tone signal; Rescreening, i.e. combined descreening and halftoning
-
- 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
- H04N1/46—Colour picture communication systems
- H04N1/56—Processing of colour picture signals
- H04N1/58—Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Image Processing (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Supports For Pipes And Cables (AREA)
- Editing Of Facsimile Originals (AREA)
- Image Analysis (AREA)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL9800491A IL98004A (en) | 1991-04-30 | 1991-04-30 | Apparatus and method for descreening |
IL11516691A IL115166A (en) | 1991-04-30 | 1991-04-30 | Apparatus and method for descreening |
US07/750,515 US5333064A (en) | 1991-04-30 | 1991-08-27 | Apparatus & method for descreening |
AT92303351T ATE163497T1 (de) | 1991-04-30 | 1992-04-14 | Entrasterungsgerät und -verfahren |
EP92303351A EP0511754B1 (en) | 1991-04-30 | 1992-04-14 | Apparatus and method for descreening |
DE69224491T DE69224491T2 (de) | 1991-04-30 | 1992-04-14 | Entrasterungsgerät und -verfahren |
JP4111956A JPH06233118A (ja) | 1991-04-30 | 1992-04-30 | 連続階調イメージを生成するためにデスクリーニングの実行と、ハーフ階調イメージの解像度の変更とを実行するための装置と方法 |
US08/178,115 US5384648A (en) | 1991-04-30 | 1994-01-06 | Apparatus and method for descreening |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL9800491A IL98004A (en) | 1991-04-30 | 1991-04-30 | Apparatus and method for descreening |
Publications (2)
Publication Number | Publication Date |
---|---|
IL98004A0 IL98004A0 (en) | 1992-06-21 |
IL98004A true IL98004A (en) | 1997-02-18 |
Family
ID=11062364
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL9800491A IL98004A (en) | 1991-04-30 | 1991-04-30 | Apparatus and method for descreening |
IL11516691A IL115166A (en) | 1991-04-30 | 1991-04-30 | Apparatus and method for descreening |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL11516691A IL115166A (en) | 1991-04-30 | 1991-04-30 | Apparatus and method for descreening |
Country Status (6)
Country | Link |
---|---|
US (2) | US5333064A (xx) |
EP (1) | EP0511754B1 (xx) |
JP (1) | JPH06233118A (xx) |
AT (1) | ATE163497T1 (xx) |
DE (1) | DE69224491T2 (xx) |
IL (2) | IL98004A (xx) |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3707532C2 (de) * | 1987-03-09 | 1998-05-28 | Bauer Johann | Verwendung einer Kombination von Extr. Gingko biloba oder mindestens einem Gingkolid und Acetylsalicylsäure oder DL-Lysin-mono-acetylsalicylat oder Diflunisal zur Behandlung von Verbrennungen, Verbrühungen, Strahlenschäden und Erfrierungen |
US5832112A (en) * | 1993-12-24 | 1998-11-03 | Canon Kabushiki Kaisha | Image processing apparatus capable of detecting specific originals |
US6411745B1 (en) * | 1994-03-09 | 2002-06-25 | Eastman Kodak Company | Method and apparatus to reduce cross-interference in reproduction of scanned halftone images |
US5615314A (en) * | 1994-08-30 | 1997-03-25 | Management Graphics, Inc. | Interface for providing rasterized data to an imaging device |
US6522425B2 (en) * | 1997-02-04 | 2003-02-18 | Fuji Photo Film Co., Ltd. | Method of predicting and processing image fine structures |
DE19706160A1 (de) * | 1997-02-17 | 1998-08-20 | Heidelberger Druckmasch Ag | Verfahren zur Abtastung von gerasterten Bildvorlagen |
US6075926A (en) * | 1997-04-21 | 2000-06-13 | Hewlett-Packard Company | Computerized method for improving data resolution |
US6163629A (en) * | 1998-01-30 | 2000-12-19 | Compaq Computer Corporation | Method for low complexity low memory inverse dithering |
US6208769B1 (en) * | 1998-05-28 | 2001-03-27 | Acuity Imaging, Llc | Method of accurately locating the fractional position of a template match point |
US6222641B1 (en) * | 1998-07-01 | 2001-04-24 | Electronics For Imaging, Inc. | Method and apparatus for image descreening |
US6233060B1 (en) * | 1998-09-23 | 2001-05-15 | Seiko Epson Corporation | Reduction of moiré in screened images using hierarchical edge detection and adaptive-length averaging filters |
US6590676B1 (en) * | 1999-05-18 | 2003-07-08 | Electronics For Imaging, Inc. | Image reconstruction architecture |
US6628845B1 (en) * | 1999-10-20 | 2003-09-30 | Nec Laboratories America, Inc. | Method for subpixel registration of images |
AU2450101A (en) * | 1999-12-31 | 2001-07-16 | Digimarc Corporation | Compensating for color response and transfer function of scanner and/or printer when reading a digital watermark |
US6839151B1 (en) * | 2000-02-02 | 2005-01-04 | Zoran Corporation | System and method for color copy image processing |
US6721458B1 (en) | 2000-04-14 | 2004-04-13 | Seiko Epson Corporation | Artifact reduction using adaptive nonlinear filters |
US7187475B1 (en) * | 2000-09-28 | 2007-03-06 | Zoran Corporation | System and method for a robust de-screening filter |
US7085016B2 (en) * | 2000-11-21 | 2006-08-01 | Silicon Integrated Systems Corp. | Method and apparatus for dithering and inversely dithering in image processing and computer graphics |
US7262879B2 (en) * | 2001-03-28 | 2007-08-28 | Sharp Laboratories Of America, Inc. | Method for screening of halftone images |
US7228002B2 (en) * | 2001-05-14 | 2007-06-05 | Intel Corporation | Inverse halftoning process |
US7170641B2 (en) * | 2001-09-05 | 2007-01-30 | Agfa Corporation | Method of generating medium resolution proofs from high resolution image data |
US7085015B2 (en) | 2002-02-01 | 2006-08-01 | Seiko Epson Corporation | Inverse halftoning for multi-level halftones |
JP4060748B2 (ja) * | 2002-05-07 | 2008-03-12 | 松下電器産業株式会社 | 画像角度検出装置それを備えた走査線補間装置 |
US7817850B2 (en) * | 2002-06-28 | 2010-10-19 | Nokia Corporation | Information terminal |
US7218418B2 (en) * | 2002-07-01 | 2007-05-15 | Xerox Corporation | Digital de-screening of documents |
US7433084B2 (en) * | 2002-07-01 | 2008-10-07 | Xerox Corporation | Digital de-screening technique for scanned documents |
US7639392B2 (en) * | 2003-03-28 | 2009-12-29 | Infoprint Solutions Company, Llc | Methods, systems, and media to enhance image processing in a color reprographic system |
DE10325621B4 (de) * | 2003-06-06 | 2006-02-16 | Heidelberger Druckmaschinen Ag | Verfahren zur Grauwertkorrektur für binäre Bilddaten |
US7532363B2 (en) * | 2003-07-01 | 2009-05-12 | Xerox Corporation | Apparatus and methods for de-screening scanned documents |
US7365882B2 (en) * | 2004-02-12 | 2008-04-29 | Xerox Corporation | Halftone screen frequency and magnitude estimation for digital descreening of documents |
JP2006115078A (ja) * | 2004-10-13 | 2006-04-27 | Matsushita Electric Ind Co Ltd | 画像データの信号処理装置及びその方法 |
JP4525403B2 (ja) * | 2005-03-22 | 2010-08-18 | 富士ゼロックス株式会社 | 画像形成装置およびその制御方法 |
US7557963B2 (en) * | 2005-08-12 | 2009-07-07 | Seiko Epson Corporation | Label aided copy enhancement |
EP1924075B1 (en) * | 2006-11-17 | 2013-07-31 | Samsung Electronics Co., Ltd. | Image processing using hybrid lookup table |
US8199363B2 (en) * | 2006-11-17 | 2012-06-12 | Samsung Electronics Co., Ltd. | Image processing using hybrid lookup table |
US8638475B2 (en) * | 2010-11-17 | 2014-01-28 | Eastman Kodak Company | Recreating step and repeat geometrical data |
US8736894B2 (en) * | 2011-12-20 | 2014-05-27 | Eastman Kodak Company | Producing correction data for printer |
JP5809575B2 (ja) * | 2012-01-31 | 2015-11-11 | 株式会社日立ハイテクノロジーズ | 画像処理装置および方法と歪補正マップ作成装置および方法と半導体計測装置 |
US9019570B1 (en) | 2013-11-27 | 2015-04-28 | Mcgraw-Hill School Education Holdings Llc | Systems and methods for computationally distinguishing handwritten pencil marks from preprinted marks in a scanned document |
US9147262B1 (en) * | 2014-08-25 | 2015-09-29 | Xerox Corporation | Methods and systems for image processing |
US9578207B1 (en) * | 2015-09-30 | 2017-02-21 | Csr Imaging Us, Lp | Systems and methods for selectively screening image data |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US455459A (en) * | 1891-07-07 | Motor | ||
NL7108091A (xx) * | 1971-06-12 | 1972-12-14 | ||
US3885224A (en) * | 1972-02-24 | 1975-05-20 | Carl N Klahr | Signal processing apparatus for imaging scanner |
US4082429A (en) * | 1975-04-22 | 1978-04-04 | Minnesota Mining And Manufacturing Company | Apparatus for copying graphic images including the processing of incoherent radiation with a spatial filter |
US4082431A (en) * | 1975-04-22 | 1978-04-04 | Minnesota Mining And Manufacturing Company | Image processing system using incoherent radiation and spatial filter hologram |
US4326252A (en) * | 1976-11-29 | 1982-04-20 | Hitachi Medical Corporation | Method of reconstructing cross-section image |
US4231656A (en) * | 1979-03-28 | 1980-11-04 | The Boeing Company | Apparatus and method of converting an image on a transparency to line art on a recording medium |
US4259694A (en) * | 1979-08-24 | 1981-03-31 | Xerox Corporation | Electronic rescreen technique for halftone pictures |
DE3010880C2 (de) * | 1980-03-21 | 1984-06-20 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Rasterumsetzungsverfahren zum Gravieren von Druckformen |
US4288821A (en) * | 1980-06-02 | 1981-09-08 | Xerox Corporation | Multi-resolution image signal processing apparatus and method |
GB2089164A (en) * | 1980-11-07 | 1982-06-16 | Ringier & Co Ag | Method and device for sequentially imaging an original |
DE3217752C2 (de) * | 1981-05-20 | 1985-05-02 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Abtastverfahren und Abtastblende zur Vermeidung von Moiré in der Reproduktionstechnik |
EP0065281B1 (de) * | 1981-05-20 | 1990-12-05 | DR.-ING. RUDOLF HELL GmbH | Abtastverfahren und Abtastblende zum Unterdrücken von Moiré bei der Abtastung gerasterter Vorlagen |
US4447830A (en) * | 1981-09-10 | 1984-05-08 | Xerox Corporation | Image scanning apparatus and method |
IT1201920B (it) * | 1982-03-22 | 1989-02-02 | Olivetti & Co Spa | Apparecchiatura per la scansione ed il trattamento numerico di immagini con mezzi toni |
US4680720A (en) * | 1983-10-17 | 1987-07-14 | Kabushiki Kaisha Toshiba | Dot interpolation control system |
GB8506931D0 (en) * | 1985-03-18 | 1985-04-24 | Crosfield Electronics Ltd | Image processing |
US4941185A (en) * | 1985-03-18 | 1990-07-10 | Crosfield Electronics | Image processing |
US4641244A (en) * | 1985-04-05 | 1987-02-03 | Opti-Copy, Inc. | Method and apparatus for registering color separation film |
GB8718100D0 (en) * | 1987-07-30 | 1987-09-03 | Crosfield Electronics Ltd | Image processing |
JPH01154669A (ja) * | 1987-12-10 | 1989-06-16 | Dainippon Screen Mfg Co Ltd | 画像合成装置 |
US4942480A (en) * | 1988-09-06 | 1990-07-17 | Nynex Corporation | Reproduction of halftone original with moire reduction and tone adjustment |
JPH0276370A (ja) * | 1988-09-13 | 1990-03-15 | Canon Inc | 多値化方法 |
JPH0296473A (ja) * | 1988-09-30 | 1990-04-09 | Matsushita Graphic Commun Syst Inc | 画信号処理装置 |
JPH0691620B2 (ja) * | 1988-11-15 | 1994-11-14 | 大日本スクリーン製造株式会社 | カラー画像の網目版画像記録方法 |
US4987496A (en) * | 1989-09-18 | 1991-01-22 | Eastman Kodak Company | System for scanning halftoned images |
US5027078A (en) * | 1989-10-10 | 1991-06-25 | Xerox Corporation | Unscreening of stored digital halftone images by logic filtering |
JPH04246690A (ja) * | 1990-08-29 | 1992-09-02 | Xerox Corp | 高品質のイメージを並みの解像度で表示する方法 |
-
1991
- 1991-04-30 IL IL9800491A patent/IL98004A/xx not_active IP Right Cessation
- 1991-04-30 IL IL11516691A patent/IL115166A/xx not_active IP Right Cessation
- 1991-08-27 US US07/750,515 patent/US5333064A/en not_active Expired - Fee Related
-
1992
- 1992-04-14 DE DE69224491T patent/DE69224491T2/de not_active Expired - Fee Related
- 1992-04-14 AT AT92303351T patent/ATE163497T1/de active
- 1992-04-14 EP EP92303351A patent/EP0511754B1/en not_active Expired - Lifetime
- 1992-04-30 JP JP4111956A patent/JPH06233118A/ja active Pending
-
1994
- 1994-01-06 US US08/178,115 patent/US5384648A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US5333064A (en) | 1994-07-26 |
JPH06233118A (ja) | 1994-08-19 |
DE69224491D1 (de) | 1998-04-02 |
DE69224491T2 (de) | 1998-06-18 |
EP0511754A2 (en) | 1992-11-04 |
IL115166A (en) | 1997-02-18 |
EP0511754A3 (en) | 1994-05-11 |
EP0511754B1 (en) | 1998-02-25 |
ATE163497T1 (de) | 1998-03-15 |
IL98004A0 (en) | 1992-06-21 |
US5384648A (en) | 1995-01-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0511754A3 (en) | Apparatus and method for descreening | |
DE3689930T2 (de) | Elektronisches Abbildungsgerät. | |
EP0827332A3 (en) | Apparatus and method for modifying enlarged ratio or reduced ratio of image | |
CA2239850A1 (en) | Method and apparatus for extracting a foreground image and a background image from a color document image | |
EP1018705A3 (en) | Magnifying digital image using edge mapping | |
CA2001261A1 (en) | Method of and apparatus for recording halftone images and halftone images produced thereby | |
EP1215883A3 (en) | Adaptive filtering method and apparatus for descreening scanned halftoned image representations | |
EP0527097A3 (en) | Apparatus and method for collectively performing tile-based image rotation, scaling and digital halftone screening | |
JPH077617A (ja) | 色値処理方法および処理装置 | |
EP0926901A3 (en) | Colour image pickup apparatus | |
EP0701363A3 (en) | Method and device for generating halftone dot screens for producing color images | |
JPS59116658A (ja) | 複数原稿同時記録装置 | |
DE69313551D1 (de) | Bildverarbeitungsgerät und Methode zur Änderung eingelesener Bildpunkttonwerte, beruhend auf einem veränderlichen Bildhintergrund-Bezugstonwert | |
EP0369301A3 (en) | An apparatus of and a method for image reproducing with variable reproduction scale | |
DE69115117D1 (de) | Gerät zur Verbesserung der Schärfe bei einem Farbbild. | |
EP0977424A3 (en) | Halftone printing using donut filters | |
CA2120845A1 (en) | Apparatus and technique for generating a screen reproduction of an image | |
HK1006486A1 (en) | Facsimile apparatus and method for producing variable size and resolution images on a reproduction medium | |
EP0334518A3 (en) | Image forming apparatus | |
JPS5827147A (ja) | 網目版作成方法 | |
CA2105019A1 (en) | Method and Apparatus for Elimination of Color from Multi-Color Image Documents | |
EP0457519A3 (en) | Apparatus for generating a screened reproduction of an image | |
EP0833497A3 (en) | Image processing system | |
EP1079603A3 (en) | Method and apparatus for providing halftoning processing of color images | |
JP4008801B2 (ja) | カラー画像読取り装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FF | Patent granted | ||
KB | Patent renewed | ||
MM9K | Patent not in force due to non-payment of renewal fees |