PhotoDNA
PhotoDNA refers to a technology developed by Microsoft that computes hash values of images in order to identify alike images.[1] It is currently used with their own services Bing and OneDrive,[2] as well as Google Gmail, Twitter,[3] Facebook [4] and the National Center for Missing & Exploited Children,[5] to whom Microsoft has donated the technology.
PhotoDNA is primarily used in the prevention of child pornography and works by computing a hash that represents an image. This hash is computed such that it is resistant to alterations in the image, including resizing and minor color alterations.[1] It works by converting the image to black and white, re-sizing it, breaking it into a grid, and looking at intensity gradients or edges.[6]
References
- ^ a b "PhotoDNA at a Glance". Microsoft.com. Retrieved 22 July 2013.
{{cite web}}:|first=missing|last=(help) - ^ http://www.makeuseof.com/tag/unfortunate-truths-about-child-pornography-and-the-internet-feature/
- ^ Arthur, Charles (22 July 2013). "Twitter to introduce PhotoDNA system to block child abuse images". The Guardian. Retrieved 22 July 2013.
- ^ Smith, Catharine (05/02/11). "Facebook Adopts Microsoft PhotoDNA To Remove Child Pornography". Huffington Post. Retrieved 22 July 2013.
{{cite news}}: Check date values in:|date=(help) - ^ Salcito, Anthony (2009-12-17). "Microsoft donates PhotoDNA technology to make the Internet safer for kids". Retrieved 22 July 2013.
- ^ "Photo DNA : Step by step". Microsoft.com. Retrieved 2014-02-11.
 | This graphics software–related article is a stub. You can help Wikipedia by expanding it. |