Human motion tracking-by-detection using point cloud data from multiple depth sensors

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In research and practice, using computers to track people is important for many reasons including security, healthcare delivery, computer interfaces, and video gaming. Colour video cameras, and more recently colour cameras that can detect how far objects are from the cameras, have been used to track people in indoor environments without the use of any special equipment (like wearable sensors or sensors placed around the room). However, these only work well in ideal indoor environments – rooms with objects that don’t move very often, and rooms without a lot of clutter. In cases where rooms are dynamic (e.g., in hospital settings) or rooms are cluttered (e.g., busy homes), these methods of tracking do not work well. In these more challenging indoor environments, these systems often do not work because the single camera cannot see enough of the room to track the people or because the people are blocked by the clutter in the room.