What is Image Verification ( Captcha )?
A security test to determine whether or not the website visitor is human, precluding automated systems from submitting spam. It is difficult for a non-human (a computer program) to extract a word or a combination of letters and numbers from an image, if the letters and numbers are not all of the same size and of similar font. This is why the image verification security method ensures that only people are able to submit a form like this one.
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