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Bitmap for human verification RRS feed

  • Question

  • User335552008 posted
    Can anyone post an example of bitmap verification used for identifying human input? Like for example, some random digits appear on a bitmap, and the user has to type them in when logging in. Everything about the bitmap has to be randomized, like the digits, their spacing, even text style, and text font. And the bitmap can't be readable by a computer, so maybe some random lines or pixels are drawn across the bitmap, or the bitmap background is randomized in some way.
    Friday, July 2, 2004 2:26 AM

All replies

  • User-614773675 posted
    Hi, I guess you're talking about CAPTCHA image in ASP.NET :) FYI: http://www.codeproject.com/aspnet/CaptchaImage.asp Colt
    Friday, July 2, 2004 3:04 AM
  • User335552008 posted
    Thanks, I didn't know there was a name for it. That gave me more links to investigate: http://www.captcha.net/ http://www.cs.berkeley.edu/~mori/gimpy/gimpy.html http://www.cs.berkeley.edu/~mori/gimpy/hard/
    Friday, July 2, 2004 4:50 PM
  • User335552008 posted
    Ugh, I can't get it to work. I'm getting errors with these two lines: Inherits="CaptchaImage._Default" Inherits="CaptchaImage.JpegImage" from Default.aspx and JpegImage.aspx. Parser Error Message: Could not load type 'CaptchaImage.JpegImage'. I removed both Inherit lines, and all I get is a broken image link.
    Friday, July 2, 2004 5:14 PM