CA2790402A1 - Text enhancement of a textual image undergoing optical character recognition - Google Patents

Text enhancement of a textual image undergoing optical character recognition Download PDF

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Publication number
CA2790402A1
CA2790402A1 CA2790402A CA2790402A CA2790402A1 CA 2790402 A1 CA2790402 A1 CA 2790402A1 CA 2790402 A CA2790402 A CA 2790402A CA 2790402 A CA2790402 A CA 2790402A CA 2790402 A1 CA2790402 A1 CA 2790402A1
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CA
Canada
Prior art keywords
image
background
pixels
foreground
text
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.)
Abandoned
Application number
CA2790402A
Other languages
English (en)
French (fr)
Inventor
Sasa Galic
Djordje Nijemcevic
Bodin Dresevic
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.)
Microsoft Technology Licensing LLC
Original Assignee
Microsoft Corp
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 Microsoft Corp filed Critical Microsoft Corp
Publication of CA2790402A1 publication Critical patent/CA2790402A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/44—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
    • G06V10/457—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components by analysing connectivity, e.g. edge linking, connected component analysis or slices
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06V30/18—Extraction of features or characteristics of the image
    • G06V30/1801—Detecting partial patterns, e.g. edges or contours, or configurations, e.g. loops, corners, strokes or intersections
    • G06V30/18076—Detecting partial patterns, e.g. edges or contours, or configurations, e.g. loops, corners, strokes or intersections by analysing connectivity, e.g. edge linking, connected component analysis or slices
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V2201/00—Indexing scheme relating to image or video recognition or understanding
    • G06V2201/01—Solutions for problems related to non-uniform document background
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Character Input (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)
  • Image Analysis (AREA)
CA2790402A 2010-03-10 2011-03-07 Text enhancement of a textual image undergoing optical character recognition Abandoned CA2790402A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12/720,732 2010-03-10
US12/720,732 US8526732B2 (en) 2010-03-10 2010-03-10 Text enhancement of a textual image undergoing optical character recognition
PCT/US2011/027439 WO2011112522A2 (en) 2010-03-10 2011-03-07 Text enhancement of a textual image undergoing optical character recognition

Publications (1)

Publication Number Publication Date
CA2790402A1 true CA2790402A1 (en) 2011-09-15

Family

ID=44560016

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2790402A Abandoned CA2790402A1 (en) 2010-03-10 2011-03-07 Text enhancement of a textual image undergoing optical character recognition

Country Status (8)

Country Link
US (1) US8526732B2 (enExample)
EP (1) EP2545499B1 (enExample)
JP (1) JP5754065B2 (enExample)
KR (1) KR101795823B1 (enExample)
CN (1) CN102782706B (enExample)
CA (1) CA2790402A1 (enExample)
ES (1) ES2773719T3 (enExample)
WO (1) WO2011112522A2 (enExample)

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CN110533049B (zh) * 2018-05-23 2023-05-02 富士通株式会社 提取印章图像的方法和装置
CN111986095B (zh) * 2019-05-22 2024-03-19 上海哔哩哔哩科技有限公司 基于边缘提取的图像处理方法及图像处理装置
CN111080554B (zh) * 2019-12-20 2023-08-04 成都极米科技股份有限公司 一种投影内容中字幕区域增强方法、装置及可读存储介质
US11205084B2 (en) * 2020-02-17 2021-12-21 Wipro Limited Method and system for evaluating an image quality for optical character recognition (OCR)
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CN111507352B (zh) * 2020-04-16 2021-09-28 腾讯科技（深圳）有限公司 一种图像处理方法、装置、计算机设备以及存储介质
CN111753832B (zh) * 2020-07-02 2023-12-08 杭州睿琪软件有限公司 图像处理方法、图像处理装置、电子设备和存储介质
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Also Published As

Publication number Publication date
WO2011112522A2 (en) 2011-09-15
EP2545499A4 (en) 2017-08-30
JP5754065B2 (ja) 2015-07-22
KR20130016213A (ko) 2013-02-14
US20110222768A1 (en) 2011-09-15
EP2545499A2 (en) 2013-01-16
WO2011112522A3 (en) 2011-11-03
KR101795823B1 (ko) 2017-11-08
US8526732B2 (en) 2013-09-03
CN102782706B (zh) 2014-07-23
EP2545499B1 (en) 2020-01-08
ES2773719T3 (es) 2020-07-14
CN102782706A (zh) 2012-11-14
JP2013527513A (ja) 2013-06-27

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Legal Events

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EEER Examination request

Effective date: 20160307

FZDE Discontinued

Effective date: 20180307