CN1258745C - 用于液晶投影仪的存储器高效的图象赝象去除技术 - Google Patents

用于液晶投影仪的存储器高效的图象赝象去除技术 Download PDF

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Publication number
CN1258745C
CN1258745C CNB021018006A CN02101800A CN1258745C CN 1258745 C CN1258745 C CN 1258745C CN B021018006 A CNB021018006 A CN B021018006A CN 02101800 A CN02101800 A CN 02101800A CN 1258745 C CN1258745 C CN 1258745C
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CN
China
Prior art keywords
pixel
image
mask
pixels
center
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Expired - Fee Related
Application number
CNB021018006A
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English (en)
Chinese (zh)
Other versions
CN1366275A (zh
Inventor
陈昭元
疏效平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
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Seiko Epson Corp
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Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Publication of CN1366275A publication Critical patent/CN1366275A/zh
Application granted granted Critical
Publication of CN1258745C publication Critical patent/CN1258745C/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/002—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/20—Image enhancement or restoration using local operators
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/73—Deblurring; Sharpening
    • G06T5/75—Unsharp masking
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7441—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of liquid crystal cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20004—Adaptive image processing
    • G06T2207/20012—Locally adaptive
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7441—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of liquid crystal cells
    • H04N2005/745—Control circuits therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Analysis (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
CNB021018006A 2001-01-18 2002-01-18 用于液晶投影仪的存储器高效的图象赝象去除技术 Expired - Fee Related CN1258745C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/766,123 US6879734B2 (en) 2001-01-18 2001-01-18 Memory efficient image artifact removal technique for LCP
US09/766123 2001-01-18

Publications (2)

Publication Number Publication Date
CN1366275A CN1366275A (zh) 2002-08-28
CN1258745C true CN1258745C (zh) 2006-06-07

Family

ID=25075472

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB021018006A Expired - Fee Related CN1258745C (zh) 2001-01-18 2002-01-18 用于液晶投影仪的存储器高效的图象赝象去除技术

Country Status (5)

Country Link
US (1) US6879734B2 (https=)
EP (1) EP1227678A3 (https=)
JP (1) JP4123780B2 (https=)
KR (1) KR100521962B1 (https=)
CN (1) CN1258745C (https=)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7599576B2 (en) * 2004-01-23 2009-10-06 Electro Scientific Industries, Inc. Image subtraction of illumination artifacts
US7483059B2 (en) * 2004-04-30 2009-01-27 Hewlett-Packard Development Company, L.P. Systems and methods for sampling an image sensor
US7783117B2 (en) * 2005-08-12 2010-08-24 Seiko Epson Corporation Systems and methods for generating background and foreground images for document compression
US7899258B2 (en) * 2005-08-12 2011-03-01 Seiko Epson Corporation Systems and methods to convert images into high-quality compressed documents
WO2007029235A2 (en) * 2005-09-05 2007-03-15 Algosoft Limited Automatic digital film and video restoration
JP4215038B2 (ja) * 2005-09-16 2009-01-28 セイコーエプソン株式会社 画像処理装置、画像処理方法、およびプログラム
US7894689B2 (en) * 2007-05-31 2011-02-22 Seiko Epson Corporation Image stitching
JP5736652B2 (ja) * 2010-03-09 2015-06-17 セイコーエプソン株式会社 画像表示装置および画像表示方法
US11109005B2 (en) * 2019-04-18 2021-08-31 Christie Digital Systems Usa, Inc. Device, system and method for enhancing one or more of high contrast regions and text regions in projected images

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4194221A (en) * 1978-12-26 1980-03-18 Xerox Corporation Automatic multimode continuous halftone line copy reproduction
GB2170373B (en) * 1984-12-28 1989-03-15 Canon Kk Image processing apparatus
JPH0683374B2 (ja) * 1986-02-14 1994-10-19 富士写真フイルム株式会社 網点画像の形成方法
JPS6460087A (en) 1987-08-31 1989-03-07 Canon Kk Signal processing circuit
JP3050282B2 (ja) 1996-03-06 2000-06-12 日本電気株式会社 液晶プロジェクタの歪み補正装置
US5798846A (en) * 1996-05-28 1998-08-25 Hewlett-Packard Company Apparatus and method for selectively processing a scanned image
US6160913A (en) * 1998-03-25 2000-12-12 Eastman Kodak Company Method and apparatus for digital halftone dots detection and removal in business documents
US6633411B1 (en) * 1998-04-01 2003-10-14 International Business Machines Corporation Method and apparatus for repurposing binary images
EP1079601B1 (en) 1999-03-05 2008-06-18 Seiko Epson Corporation Image data correcting device, image data correcting method, medium on which image data correcting program is recorded

Also Published As

Publication number Publication date
KR100521962B1 (ko) 2005-10-17
KR20020061494A (ko) 2002-07-24
EP1227678A3 (en) 2003-08-27
CN1366275A (zh) 2002-08-28
JP2002259963A (ja) 2002-09-13
JP4123780B2 (ja) 2008-07-23
US20020094129A1 (en) 2002-07-18
EP1227678A2 (en) 2002-07-31
US6879734B2 (en) 2005-04-12

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Granted publication date: 20060607

Termination date: 20130118

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