Content Technologies, a developer of e-mail and Internet content security and policy management solutions, has launched PORNsweeper – image analysis software that allows organisations to prevent what they consider unacceptable images, including pornography, being e-mailed into or out of their networks.
PORNsweeper itself is actually is a new add-on module for Content Technologies’ MAILsweeper for SMTP. It works at the e-mail gateway to provide policy-based image analysis to enforce an organisation’s e-mail policy. In operation, it scans the contents of image files attached to e-mails or embedded within e-mail attachments. It then conducts a number of tests to conclude the likelihood that the file contains a pornographic image.
These tests include searching the file for the colour of human pigmentation in the pixels as well as analysing the skin pixels to determine various statistics about the image. Funnily enough, nude or pornographic images contain more skin pixels than other images where skin is present! The software also analyses whether the image is a portrait photograph or an ‘unacceptable’ image through ‘face detection’ technology.
The sensitivity of PORNsweeper can be adapted so that users in sectors which have a high propensity to distribute human images [e.g. marketing departments] can still use it to detect unacceptable images. In internal testing, the company says that the software has been proven to successfully block over 90% of unacceptable images.
Content Technologies are on the web at: www.contenttechnologies.com