ZA853805B - Document scanning system for enhancing information - Google Patents

Document scanning system for enhancing information

Info

Publication number
ZA853805B
ZA853805B ZA853805A ZA853805A ZA853805B ZA 853805 B ZA853805 B ZA 853805B ZA 853805 A ZA853805 A ZA 853805A ZA 853805 A ZA853805 A ZA 853805A ZA 853805 B ZA853805 B ZA 853805B
Authority
ZA
South Africa
Prior art keywords
pixel
scanning system
window
document scanning
latches
Prior art date
Application number
ZA853805A
Other languages
English (en)
Inventor
Ergin Ataman
John Thomas King
Original Assignee
Ncr Canada
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ncr Canada filed Critical Ncr Canada
Publication of ZA853805B publication Critical patent/ZA853805B/xx

Links

Classifications

    • 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
    • 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
    • H04N1/409—Edge or detail enhancement; Noise or error suppression
    • H04N1/4092—Edge or detail enhancement

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimiles In General (AREA)
  • Color Image Communication Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Networks Using Active Elements (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Character Input (AREA)
ZA853805A 1984-06-14 1985-05-20 Document scanning system for enhancing information ZA853805B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/620,660 US4613986A (en) 1984-06-14 1984-06-14 Digital filter for enhancement of document images

Publications (1)

Publication Number Publication Date
ZA853805B true ZA853805B (en) 1986-01-29

Family

ID=24486830

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA853805A ZA853805B (en) 1984-06-14 1985-05-20 Document scanning system for enhancing information

Country Status (9)

Country Link
US (1) US4613986A (fr)
EP (1) EP0165045B1 (fr)
JP (1) JPS6145376A (fr)
AT (1) ATE60969T1 (fr)
AU (1) AU573837B2 (fr)
CA (1) CA1286394C (fr)
DE (2) DE3581766D1 (fr)
DK (1) DK266085A (fr)
ZA (1) ZA853805B (fr)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3583474D1 (de) * 1984-07-25 1991-08-22 Matsushita Electric Industrial Co Ltd Bildsignalverarbeitungsgeraet.
US4817180A (en) * 1984-11-10 1989-03-28 Dainippon Screen Mfg. Co., Ltd. Image signal filtering
US4771470A (en) * 1985-11-14 1988-09-13 University Of Florida Noise reduction method and apparatus for medical ultrasound
US4907152A (en) * 1986-09-25 1990-03-06 The Boeing Company Method of improving CT resolution
JPS63205778A (ja) * 1987-02-20 1988-08-25 Sumitomo Electric Ind Ltd ビデオ信号デイジタル化回路
US4982294A (en) * 1987-07-24 1991-01-01 Eastman Kodak Company Apparatus for enhancing and thresholding scanned microfilm images and methods for use therein
US4868670A (en) * 1987-07-24 1989-09-19 Eastman Kodak Company Apparatus and method for improving the compressibility of an enhanced image through use of a momentarily varying threshold level
US4853795A (en) * 1987-07-24 1989-08-01 Eastman Kodak Company Forward look ahead techniques for tracking background and noise levels in scanned video images
US4774565A (en) * 1987-08-24 1988-09-27 Polaroid Corporation Method and apparatus for reconstructing missing color samples
EP0372950B1 (fr) * 1988-12-08 1995-07-05 Canon Kabushiki Kaisha Appareil pour la réduction d'images
JP2650759B2 (ja) * 1989-07-21 1997-09-03 富士写真フイルム株式会社 画像処理装置
US5305398A (en) * 1989-10-10 1994-04-19 Unisys Corporation Method and apparatus for scaling image data
DE69032400T2 (de) * 1989-10-10 1999-02-18 Unisys Corp., Blue Bell, Pa. Bilddatenverarbeitungssystem und methode
US5287416A (en) * 1989-10-10 1994-02-15 Unisys Corporation Parallel pipelined image processor
US5048104A (en) * 1989-10-10 1991-09-10 Unisys Corporation Method and apparatus for transposing image data
US5029226A (en) * 1989-10-10 1991-07-02 Unisys Corporation Method and apparatus for effecting spot/void filtering of image data
US5055919A (en) * 1989-10-10 1991-10-08 Unisys Corporation Apparatus for image data transposition and compression/decompression
US5093871A (en) * 1989-10-10 1992-03-03 Unisys Corporation Method and apparatus for effecting background suppression of image data
US5140444A (en) * 1989-10-10 1992-08-18 Unisys Corporation Image data processor
US5020124A (en) * 1989-10-10 1991-05-28 Unisys Corporation Method and apparatus for detecting document size in an imaging system
US5095374A (en) * 1989-10-10 1992-03-10 Unisys Corporation Method and apparatus for lossless compression and decompression of image data
JP2707346B2 (ja) * 1990-01-12 1998-01-28 富士写真フイルム株式会社 放射線画像情報読取装置
JPH0491282U (fr) * 1990-12-26 1992-08-10
US5157740A (en) * 1991-02-07 1992-10-20 Unisys Corporation Method for background suppression in an image data processing system
US5307175A (en) * 1992-03-27 1994-04-26 Xerox Corporation Optical image defocus correction
US5651078A (en) * 1994-07-18 1997-07-22 Thomson Consumer Electronics, Inc. Method and apparatus for reducing contouring in video compression
JP3733826B2 (ja) * 2000-03-03 2006-01-11 セイコーエプソン株式会社 画像処理装置
US7440633B2 (en) * 2003-12-19 2008-10-21 Sharp Laboratories Of America, Inc. Enhancing the quality of decoded quantized images
JP5018486B2 (ja) * 2008-01-10 2012-09-05 セイコーエプソン株式会社 画像処理回路、画像処理装置
CN102103742A (zh) * 2009-12-16 2011-06-22 鸿富锦精密工业（深圳）有限公司 图像文件处理装置和方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5231134B2 (fr) * 1972-01-24 1977-08-12
US3973239A (en) * 1973-10-17 1976-08-03 Hitachi, Ltd. Pattern preliminary processing system
US4003024A (en) * 1975-10-14 1977-01-11 Rockwell International Corporation Two-dimensional binary data enhancement system
WO1980000774A1 (fr) * 1978-09-28 1980-04-17 Eastman Kodak Co Mise en valeur electronique d'une image
US4491964A (en) * 1979-04-23 1985-01-01 Recognition Equipment Incorporated Image processing integrated circuit
US4463381A (en) * 1980-04-16 1984-07-31 Eastman Kodak Company Image processing apparatus including a partitioned low pass channel
US4389677A (en) * 1980-12-08 1983-06-21 Ncr Canada Ltd - Ncr Canada Ltee Method and apparatus for removing erroneous elements from digital images
US4443855A (en) * 1981-05-06 1984-04-17 Robert Bishop Method of and apparatus for controlling robotic equipment with the aid of mask algorithm image processing techniques
JPS6053349B2 (ja) * 1981-06-19 1985-11-25 株式会社日立製作所 画像処理プロセツサ
US4532548A (en) * 1983-01-27 1985-07-30 Hughes Aircraft Company Resolution enhancement and zoom
US4503461A (en) * 1983-02-22 1985-03-05 The Board Of Trustees Of The Leland, Stanford Junior University Multiple measurement noise reducing system using space-variant filters
AU565874B2 (en) * 1983-03-11 1987-10-01 Ei Solutions, Inc. Adaptive threshold circuit for digital image processing

Also Published As

Publication number Publication date
JPS6145376A (ja) 1986-03-05
DE3581766D1 (de) 1991-03-28
DK266085D0 (da) 1985-06-13
EP0165045B1 (fr) 1991-02-20
EP0165045A3 (en) 1987-12-16
ATE60969T1 (de) 1991-03-15
EP0165045A2 (fr) 1985-12-18
CA1286394C (fr) 1991-07-16
US4613986A (en) 1986-09-23
DE165045T1 (de) 1986-09-04
AU573837B2 (en) 1988-06-23
AU4314285A (en) 1985-12-19
DK266085A (da) 1985-12-15

Similar Documents

Publication Publication Date Title
ZA853805B (en) Document scanning system for enhancing information
ES2007662A6 (es) Procedimiento para detectar una caracteristica de un articulo
EP0327107A3 (fr) Procédé et dispositif pour augmenter la netteté d'image pour la reproduction d'images par balayage
GB2292283A (en) Binary image processor including shading correction and edge emphasis
EP0075470A2 (fr) Système de traitement d'image électronique
ES8700825A1 (es) Procedimiento de explorar una ventana de la zona de imagen de un dispositivo de transferencia de cargas y circuito de barrido correspondiente
EP0074795A3 (fr) Appareil et procédé d'analyse d'image
GB1535011A (en) Method and arrangement for redundancy-reducing picture coding
GB2192114A (en) Method of processing image signal
EP0118905A3 (fr) Circuit de seuil adaptif pour traitement d'image
EP0743617A3 (fr) Procédé et appareil de traitement d'images
IE822816L (en) Charge-coupled device
EP0179291A2 (fr) Prétraitement de données binaires d'image
US4408343A (en) Image enhancement for optical character readers
FR2675262B1 (fr) Methode de selection de traducteurs ultrasonores et traducteurs selectionnes selon cette methode.
JPS5612170A (en) Facsimile transmitter
JPS5528608A (en) Conference operation system
DE3279528D1 (en) Input/output scanner for document processing
WO1998030016A3 (fr) Procede et appareil de generation de la somme des differences absolues de demi-pixels
EP0368671A3 (fr) Appareil d'extraction de caractéristiques
JPS644346A (en) Image signal processor
JPS6218168A (ja) 画像入力装置
JPS5640363A (en) Resampling method of digital picture
JPS60263576A (ja) 画像信号補正方法
GR3031902T3 (en) Method and apparatus for simultaneously convolving multiple digital binary images using a single convolver with a binary mask to determine pixel densities