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WO2001011864A3 - System and method for processing optically scanned documents - Google Patents

System and method for processing optically scanned documents Download PDF

Info

Publication number
WO2001011864A3
WO2001011864A3 PCT/US2000/022036 US0022036W WO0111864A3 WO 2001011864 A3 WO2001011864 A3 WO 2001011864A3 US 0022036 W US0022036 W US 0022036W WO 0111864 A3 WO0111864 A3 WO 0111864A3
Authority
WO
WIPO (PCT)
Prior art keywords
image
correction
illumination
glare
distortion
Prior art date
Application number
PCT/US2000/022036
Other languages
French (fr)
Other versions
WO2001011864A2 (en
Inventor
Sergio A Fernandez
Marcelo Funes-Gallanzi
Original Assignee
Asci Inc
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 Asci Inc filed Critical Asci Inc
Priority to AU69019/00A priority Critical patent/AU6901900A/en
Publication of WO2001011864A2 publication Critical patent/WO2001011864A2/en
Publication of WO2001011864A3 publication Critical patent/WO2001011864A3/en

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
    • H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
    • H04N2201/0434—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207 specially adapted for scanning pages of a book

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

A scanning apparatus and method for reducing the spatial distortion, compression, lack of illumination, excessive glare, and out of focus caused when scanning or copying an image of a bound document that is not placed completely flat on the scanner platen. The distortion coefficients of the bound document image are found by analyzing the colors and illumination of each pixel of the image. By applying these distortion coefficients to several different formulas, it is possible to find the coefficient values representative of the spatial distortion correction, compression correction, illumination correction, glare correction and out of focus correction, respectively. These coefficient values are all at once applied to another formula which transforms the distorted document image, giving as a result an image that has substantially less spatial distortion, is less compressed, has a more even illumination, less glare and is more focused than an image that is not placed completely flat on the scanner platen and has been scanned or photocopied without applying these correction factors. In one embodiment, once the correction factors have been applied to the image, it is coupled to an output device for printing or saving.
PCT/US2000/022036 1999-08-11 2000-08-11 System and method for processing optically scanned documents WO2001011864A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU69019/00A AU6901900A (en) 1999-08-11 2000-08-11 System and method for processing optically scanned documents

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US14841999P 1999-08-11 1999-08-11
US60/148,419 1999-08-11
US18201400P 2000-02-11 2000-02-11
US60/182,014 2000-02-11

Publications (2)

Publication Number Publication Date
WO2001011864A2 WO2001011864A2 (en) 2001-02-15
WO2001011864A3 true WO2001011864A3 (en) 2001-07-05

Family

ID=26845839

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/022036 WO2001011864A2 (en) 1999-08-11 2000-08-11 System and method for processing optically scanned documents

Country Status (2)

Country Link
AU (1) AU6901900A (en)
WO (1) WO2001011864A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100944002B1 (en) 2006-07-14 2010-02-24 삼성전자주식회사 Image processing unit and image processing method
US8413037B2 (en) 2010-06-27 2013-04-02 Hewlett-Packard Development Company, L.P. User selection of flaw present within digitally scanned document
US8306335B2 (en) 2011-03-30 2012-11-06 Seiko Epson Corporation Method of analyzing digital document images

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0937031A (en) * 1995-07-21 1997-02-07 Minolta Co Ltd Original reader
JPH118740A (en) * 1997-04-25 1999-01-12 Ricoh Co Ltd Picture reader
JPH11187171A (en) * 1997-12-17 1999-07-09 Minolta Co Ltd Image reader

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0937031A (en) * 1995-07-21 1997-02-07 Minolta Co Ltd Original reader
JPH118740A (en) * 1997-04-25 1999-01-12 Ricoh Co Ltd Picture reader
JPH11187171A (en) * 1997-12-17 1999-07-09 Minolta Co Ltd Image reader

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 7 31 August 1995 (1995-08-31) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 6 30 June 1997 (1997-06-30) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 4 30 April 1999 (1999-04-30) *

Also Published As

Publication number Publication date
AU6901900A (en) 2001-03-05
WO2001011864A2 (en) 2001-02-15

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