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Smartphone Cameras Peek Around Corners by Analyzing Patterns of Light

IEEE Spectrum Robotics Channel

Their secret to peeking around corners is detecting slight differences in light patterns reflected from moving objects or people. MIT's "CornerCameras" system can reveal the number of moving people or objects as individual lines on a graph that tracks angular velocity over time. That active laser system can detect even stationary objects with fairly high precision, whereas the new MIT CornerCameras system can only detect moving objects. The MIT CornerCameras system is fairly simple and needs nothing more than a basic webcam or iPhone 5s smartphone camera, along with a laptop to run the software algorithm.