When the sun goes down, crossing the line between the City of Light and the City of Darkness is eerie, almost post-apocalyptic: movingwithin minutes from the bright lights of Times Square to the narrow unlit streets of the Financial District with the looming outlines of skyscrapers towering overhead.
Using motion-detection algorithms, the BriefCam software separates the background (static or non-moving objects) from the moving objects, tracking and analysing any motion within the frame.