Microsoft has this service called PhotoDNA [1] that uses a perceptual hash to match bad content in photos, even when the image has been modified. It sounds pre

Microsoft has this service called PhotoDNA [1] that uses a perceptual hash to match bad content in photos, even when the image has been modified. It sounds pretty cool. [1] https://www.microsoft.com/en-us/PhotoDNA/Default https://www.microsoft.com/en-us/PhotoDNA/Default