Document Image Analysis
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Document Image Analysis CSE 717 An Introduction. Document Image Analysis. DIA is the theory and practice of recovering the symbol structures of digital images scanned from paper or produced by computer DIA is a subfield of Digital Image processing

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Document Image Analysis

CSE 717

An Introduction


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Document Image Analysis

  • DIA is the theory and practice of recovering the symbol structures of digital images scanned from paper or produced by computer

  • DIA is a subfield of Digital Image processing

    • Digital images of natural objects: X-rays, fingerprints, faces, scenery, etc. are NOT part of DIA

    • Digital images of symbolic objects: Postal addresses, printed articles, forms, music sheets, engineering drawings, topographic maps belong to DIA

    • Source: Scanners, printers, fax machines, hand!

    • Incidental text: license plates, billboards, subtitles, in photos and video

    • WWW ??

  • DIA’s grand goal is take us to the land of paperless office


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Document Image

Analysis

Textual Processing

Graphical Processing

Optical

Character

Recognition

Page

Layout

Analysis

Line

Processing

Region and

Symbol

Processing

Skew, blocks,

paragraphs

Lines, curves,

corners

Filled

regions

Text



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Meter Mark

Digital

Post Mark

Sender’s Address

Endorsement

In Case of Undeliverable as Addressed Return to Sender

Linear Code

Delivery Address

Postal Examples





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References

  • Handbook of Character Recognition and Document Image Analysis, H. Bunke and PSP Wang (editors), World Scientific Press

  • Document Image Analysis, Gorman and Kasturi , IEEE Computer Society Press

  • International Conference on Document Analysis and Recognition proceedings

  • International Workshop on Document Analysis Systems proceedings

  • Symposium on Document Image Understanding Technology


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  • OCR Features and Systems

    • Script ID, Devanagari OCR, Tamil OCR, MP versus HW

  • Handwriting Recognition

    • Postal applications, Arabic Documents

  • Classifiers and Learning

    • Multi-classifier systems

  • Layout Analysis

    • Skew correction, geometric methods, test/graphics separation, logical labeling

  • Tables and Forms

    • Detecting tables in HTML documents, use of graph grammars, semantics

  • Document Engineering

    • Processing of historical documents (palm leaf manuscripts).

  • Camera Based DIA

    • Locating and reading Barcodes

  • New Applications -CAPTCHA


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