Tag Archives: CAPTCHA

Make CAPTCHA images with overlapping characters in C#

Posted on January 28, 2015 by Rod Stephens

The following MakeCaptchaImage2 method creates a Bitmap containing a CAPTCHA image. private Random Rand = new Random(); // Draw the words with letters overlapping each other. private Bitmap MakeCaptchaImage2(string txt, int wid, int hgt, Font the_font, Brush the_brush) { Bitmap … Continue reading →

Posted in drawing, graphics, image processing, internet, transformations, web | Tagged , , , , , , , , , , , , | Comments Off on Make CAPTCHA images with overlapping characters in C#

Make CAPTCHA images in C#

Posted on January 28, 2015 by Rod Stephens

CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) images are those distorted pictures of words that some Web sites make you enter to prove you are a human and not an automated process. The idea is … Continue reading →

Posted in drawing, graphics, image processing, internet, transformations, web | Tagged , , , , , , , , , , , , | 1 Comment