Many cities already have industrial cameras installed on the streets and inside public transport (buses, trams, subway), as a way to prevent crime. Until recen

Many cities already have industrial cameras installed on the streets and inside public transport (buses, trams, subway), as a way to prevent crime. Until recently the issue was that no one had technical and financial resources to analyze the data, except on court warrant, but once Big Data and computer vision technologies become cheap enough someone will definitely use that as real time surveillance tool.