In other words…“Reverse Image Search“.
It is difficult to explain, but with Reverse Image Search you can upload an image and search for similar or a specific image over internet.
LoudTechie.com presents the “8 best reverse image search engines”
Update: ResearchBuzz.com reported that
“Stock photography site Shutterstock now offers reverse image search. ‘…You can now upload an image of your choosing to Shutterstock’s site, bypassing the need to type a query into a search bar, and the technology will identify similar images in look and feel inside of Shutterstock’s collection. Shutterstock will also soon launch visually similar discovery for video.’ ” Source: ResearchBuzz.com