Theia can search mobile phones for target images
Now suppose that it was possible to search the mobile phones directly and obtain a realtime view of what is happening. Once you think about this possibility you can immediately think up applications for it. Suppose a small child wanders off or is abducted – realtime picture search could use their accidental inclusion in other peoples photos to return an location and perhaps even a realtime track. You need to find the realtime whereabouts of a criminal, political dissident or escaped prisoner … no problem just put out a worldwide photo search and wait.
Here’s the article on I Programmer, Written by Alex Armstrong, http://www.i-programmer.info/news/149-security/2888-search-the-worlds-smartphone-photos.html