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#1 Posted : Tuesday, January 21, 2014 12:36:09 AM(UTC)
Maen Hasan

Groups: Registered, Tech Support
Posts: 1,328

Was thanked: 1 time(s) in 1 post(s)

A good CAPTCHA image is relatively easy to be understood by a human user but hard or impossible to be recognized using standard OCR algorithms.
The attached image shows how the following LEADTOOLS image processing functions could be used to generate such an image:
  • PerlinCommand
  • WaveCommand
  • FreeHandShearCommand

The image shows the function parameters used through the C DLL Image Processing Features demo. Similar results can be accomplished using code without displaying the dialog boxes using either the .NET classes mentioned above or their equivalent C/C++ functions.

Maen Badwan
LEADTOOLS Technical Support

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Edited by moderator Monday, April 24, 2017 10:58:35 AM(UTC)  | Reason: Not specified

 

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