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How To Detect Who Is Online In Facebook?

Aside from users reporting photos, are there other technologies that are being used by Facebook to detect nudity in photos?

  • Millions of photos are uploaded to Facebook everyday and I'm wondering how the Facebook Team manages to detect nude or obscene photos on the platform. Do they use any technology that helps them with this?

  • Answer:

    One of the teams at Facebook is called site integrity. It is their duty to combat this. As far as I know, there are several ways Facebook deals with nudity. First, Facebook hired some brilliant people working on Computer Vision. They have built classifier to deter abuse. But computers are unreliable. Therefore, Facebook has an operations team to manually check suspicious photos. It seems that some of the work is done in-house and some is outsourced. Finally, in the case of child pornography, Facebook, as many tech companies do, check the photos against a precompiled database.

Jingsi Zhu at Quora Visit the source

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Artificial Intelligence has not advanced much that it can detect obscene content. And also this job can be outsourced easily. Even companies like https://www.mturk.com/mturk/welcomehave realized its importance. However Fb uses https://en.wikipedia.org/wiki/PhotoDNA developed by Microsoft to compare photos to a large database maintained by http://www.missingkids.com/home to detect child exploitative content. If a match is found then they prevent the image being uploaded to Facebook, disable the account, and flag it to NCMEC for investigation. PhotoDNA 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. 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. sources: http://www.businessinsider.in/Facebook-Is-Scanning-Your-Photos-For-Explicit-Images-Of-Children-Too/articleshow/39851677.cms

Arpit Palod

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