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Java™ Drawing with Apache Batik: A Tutorial by Alexander Kolesnikov

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SVG Filters Web Application

Spamming is a major problem for Internet users today. Spamming business has reached industrial strength because it employs special robots, or automatic scripts, which search the web for our email addresses. Many websites that do not want spammer robots to parse their pages display an image of a piece of text or a number and ask the visitor to enter the text or number in a text field before allowing the user to proceed to the next page.

The reason behind this is that scripts cannot visually perceive images, they usually read text. As such, scripts will not be able to submit the correct text and enter the protected area.

However, spammers are becoming more and more sophisticated, and now their robots are able to recognize ...

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