Kaspersky Lab has patented a statistics-based method for detecting
image-based spam that is used to bypass traditional text-based filters.
The technology analyses whether text is contained in images based on the
graphic pattern of words and lines, said developer Eugene Smirnov ..
The system determines whether or not detected text is spam by comparing
it to the contents of a database of spam templates ..
http://tinyurl.com/c3brt2
http://www.computerweekly.com/Articles/2009/02/04/234600/kaspersky-files-image-based-spam-busting-patent.htm
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