Grayscale Document De-Skewing - Contents

• Introduction
• Effects of Document Skew
• Traditional Mechanical De-Skewing
  • Issue: Longer Documents
  • Alignment Guides
  • Feed Stop Rollers or Fingers
  • Census DS-250 Feeder
  • Flanged Drum
  • Converging Belts
  • Document Jams
• Electronic De-Skewing
  • Skew Measurement
    • Via Registration Marks
    • Via Document Surround
    • Via Image Data
  • Binary Image De-Skewing
    • Binary De-Skewing Effects
      • Visual Effect of Binary De-Skewing
      • Effect on OCR
    • Binary De-skewing Methods
      • Bresenham-Style Shearing
      • True Rotation
      • Rotation Via Multiple Shears
  • Grayscale De-Skewing
• Grayscale De-Skew Implementations
  • Picture Elements, Inc. Custom Designs
  • Picture Elements ISE Board&tm
  • BancTec S-Series Scanners
  • BancTec Check Scanners
• Conclusions
• Resources and References
  • Skew Removal
    • Grayscale De-skew Implementations
    • Binary De-skew Implementations
    • Mechanical De-Skew Implementations
  • Skew Measurement from Image Data
• Keywords
• Contact Information
• Trademark Notices
• Copyright Notice