Image based spam blocking

摘要

A fingerprint of an image identified within a received message is generated following analysis of the message. A spam detection engine identifies an image within a message and converts the image into a grey scale image. The spam detection engine analyzes the grey scale image and assigns a score. A fingerprint of the grey scale image is generated based on the score. The fingerprint may also be based on other factors such as the message sender's status (e.g. blacklisted or whitelisted) and other scores and reports generated by the spam detection engine. The fingerprint is then used to filter future incoming messages.

主权项

1. A method for filtering image-based messages, the method comprising:
receiving an image-based message from a sender; and executing instructions stored in memory, wherein execution of the instructions by a processor:
identifies via image analysis that one or more text lines are present within boundaries of an image of the image-based message,identifies whether the one or more text lines identified as being present within the image fit a predetermined numeric pattern, the predetermined numeric pattern based on numeric character count values corresponding to numbers of consecutive characters and spaces,assigns a score to the message based on whether the text lines fit the predetermined numeric pattern, andfilters the received image-based message based on the assigned score.