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Preprocess Images & Documents for OCR

GdPicture.NET Image SDKs include several sophisticated document imaging filters to repair and enhance the quality of digital documents whether they are bitonal or colored.
These filters are, for example, useful for better and faster OCR / OMR / Barcode detection processing and to reduce the size of the document produced.

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Document Image Processing

GdPicture.NET Document Image Processing: Features

 

  • Auto-deskew or easily retrieve the skew angle of an image.
  • Automatic punch hole removal.
  • Automatic blob removal.
  • Automatic text invert.
  • Automatic invert negative documents.
  • Forms dropout.
  • Automatic white borders removal.
  • Automatic black border removal.
  • Automatic border removal (detects any color).
  • Sophisticated lines removal filter.
  • Page orientation detection.
  • Noise removal filters.
  • Blank page detection.
  • Page color detection (bitonal, grayscale, color, or indexed color).

Examples of usage

Deskewing images.

Removing lines.

Removing punch holes.

Auto invert negative documents.

General noise clean up.

Connected characters and oversampled characters.

Low sampled characters: How to use Black Dilation.

GdPicture.NET Document Image Processing: Punch Holes Removing Example

GdPicture.NET - How to use

How to use

Download and install GdPicture.NET package from here.

You will find some compiled demo applications in
[Install directory]\samples\Bin\

You will find C# and VB.NET demo applications including source code in
[Install directory]\samples\WinForm\

You will find other code snippets within the online reference guide found here GdPicture.NET Guides

You can find some discussions about TIFF manipulation in the dedicated Image Processing section of our community forums located here Image Processing & Document Imaging

Check our other Imaging technologies

Document ViewingDocument Viewing
Document PrintingDocument Printing
Thumbnail Viewer ControlThumbnail Viewer Control
Image Processing and FiltersImage Processing and Filters

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60 Days Free Trial Download GdPicture.NET Now!

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