Chapter 13: String Reader

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This chapter explains how to perform feature-based character recognition with the MIL String Reader module.

• MIL String Reader module
• Steps to reading a string in an image
• Basic concepts for the MIL String Reader module
• Creating and customizing the fonts for a font-based context
• • Adding and deleting fonts to the context
  • Adding and deleting characters to the font
  • Character representation
  • • System characters
    • User-defined characters
  • Source image foreground
  • Normalize characters
  • Space size
  • Baseline
  • Sorting characters
• Using a fontless context
• • Enabling and disabling characters
  • Customizing a fontless context
• Adding and deleting string models to the context
• • Adding and deleting the string models
  • Preprocess and read
  • • Saving and restoring
  • Target image foreground
• Space
• • Space width
  • Maximum number of consecutive spaces
• Number of strings to read
• Degrees of freedom
• • String angle and character angle
  • String scale and character scale
  • String aspect ratio and character aspect ratio
  • Character's maximum baseline deviation
  • Skew angle
• Rules for character placement
• • String size
  • Character constraints
  • • How constraints are used with string models and fonts
  • Grammar rules
• Global context settings
• • Minimum contrast
  • Speed
  • Timeout
  • Encoding
• Scores and acceptances
• • String acceptance, certainty, and score
  • Character acceptance and score
  • • Character similarity
    • Character homogeneity
  • String target acceptance, certainty, and score
• Retrieving results and annotation
• • Annotation
  • Transformation coefficients
  • Formatted and non-formatted results
• Fixing read problems using String Expert
• String Reader example