LEADTOOLS Support
Imaging
Imaging SDK Questions
HOWTO: Generate CAPTCHA using LEAD image processing functions
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#1
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Tuesday, January 21, 2014 12:31:09 AM(UTC)
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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
Edited by moderator Monday, April 24, 2017 10:53:35 AM(UTC)
| Reason: Not specified
LEADTOOLS Support
Imaging
Imaging SDK Questions
HOWTO: Generate CAPTCHA using LEAD image processing functions
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