InftyReader – Minimum Requirements

In order for InftyReader to successfully process PDF documents or images:

  1. Characters/symbols must be crisp and clear when magnified to 600%. When viewing the characters/symbols in their magnified state(s), the edges of the characters/symbols must be smooth. There can be no pixelated (stair-step) edges.
  2. There can be no broken or fractured characters;
  3. Hard-copy, printed documents/books must be scanned at 600 Dots Per Inch (DPI). Note: Some hard-copy, printed documents/books are printed in poor quality not visible to the eye. In these instances the resulting scanned characters/symbols will not meet requirement #1. We have no control over this.
  4. Documents/images must be black and white (binary) only. There can be no gray-scale, or color, images or backgrounds;
  5. Documents/images need to have a clear white background. White is preferred. There can be no background smudges, colors, or patterns;

InftyReader cannot process documents/images containing any of the following:

  • Combined, broken, design-based, color, or fractured characters/math symbols;

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  • Images containing characters/math symbols with background colors, smudges, “dirt,” or patterns;

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  • Images containing pixelated characters/math symbols:





  • Images containing characters/math symbols that are in color, gray-scale, or “off-horizontal:”



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In order for InftyReader to successfully process images, the images of characters/math symbols must be crisp, clear, binary (black and white only), non-pixelated, and originally scanned at 600DPI. You can check all of these characteristics by magnifying your PDF document, or image file, to 800%. The characters/math symbols must be this clear and crisp:



  • InftyReader will eliminate “noise” (smudges, pencil marks, some highlights, etc.) so long as the “noise” is minor and does not cover any of the text being scanned.
  • Web-based PDF files often contain low resolution images (150-200 DPI) in order to reduce download/load times. In such cases, the recognition results will be useless.