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Researchers initially have addressed the problem of spam detection as a text classification or categorization problem. However, as spammers' continue to develop new techniques and the type of email content becomes more disparate, text-based anti-spam approaches alone are not sufficiently enough in preventing spam. In an attempt to defeat the anti-spam development technologies, spammers have recently adopted the image spam trick to make the scrutiny of emails' body text inefficient. The maindoi:10.5121/ijnlc.2014.3313 fatcat:adlavadhhba73gb3luscbp2mma