DE69516751T2 - Bildvorverarbeitung für Zeichenerkennungsanlage - Google Patents

Bildvorverarbeitung für Zeichenerkennungsanlage

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Publication number
DE69516751T2
DE69516751T2 DE69516751T DE69516751T DE69516751T2 DE 69516751 T2 DE69516751 T2 DE 69516751T2 DE 69516751 T DE69516751 T DE 69516751T DE 69516751 T DE69516751 T DE 69516751T DE 69516751 T2 DE69516751 T2 DE 69516751T2
Authority
DE
Germany
Prior art keywords
character recognition
recognition system
image preprocessing
preprocessing
image
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
Application number
DE69516751T
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English (en)
Other versions
DE69516751D1 (de
Inventor
Hussein Al-Hussein
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Canon Inc
Original Assignee
Canon Inc
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Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of DE69516751D1 publication Critical patent/DE69516751D1/de
Application granted granted Critical
Publication of DE69516751T2 publication Critical patent/DE69516751T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/40—Document-oriented image-based pattern recognition
    • G06V30/41—Analysis of document content
    • G06V30/413—Classification of content, e.g. text, photographs or tables
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/14—Image acquisition
    • G06V30/146—Aligning or centring of the image pick-up or image-field
    • G06V30/1475—Inclination or skew detection or correction of characters or of image to be recognised
    • G06V30/1478—Inclination or skew detection or correction of characters or of image to be recognised of characters or characters lines
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/14—Image acquisition
    • G06V30/148—Segmentation of character regions
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/14—Image acquisition
    • G06V30/148—Segmentation of character regions
    • G06V30/155—Removing patterns interfering with the pattern to be recognised, such as ruled lines or underlines
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/16—Image preprocessing
    • G06V30/162—Quantising the image signal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
DE69516751T 1994-04-15 1995-02-22 Bildvorverarbeitung für Zeichenerkennungsanlage Expired - Lifetime DE69516751T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22837294A 1994-04-15 1994-04-15

Publications (2)

Publication Number Publication Date
DE69516751D1 DE69516751D1 (de) 2000-06-15
DE69516751T2 true DE69516751T2 (de) 2000-10-05

Family

ID=22856917

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69516751T Expired - Lifetime DE69516751T2 (de) 1994-04-15 1995-02-22 Bildvorverarbeitung für Zeichenerkennungsanlage

Country Status (4)

Country Link
US (2) US5761344A (de)
EP (2) EP0677818B1 (de)
JP (1) JP4065460B2 (de)
DE (1) DE69516751T2 (de)

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JPH0863548A (ja) 1996-03-08
EP0677818A2 (de) 1995-10-18
EP0811946A3 (de) 1998-01-14
EP0811946A2 (de) 1997-12-10
US5818978A (en) 1998-10-06
EP0677818A3 (de) 1996-09-18
EP0677818B1 (de) 2000-05-10
US5761344A (en) 1998-06-02
DE69516751D1 (de) 2000-06-15
JP4065460B2 (ja) 2008-03-26

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