Other motion-sensing systems, like Microsoft Kinect, for example, rely on stationary cameras that view body movements. If a person is within the camera's field of view, these systems work well.

Therefore, objects in motion experience time differently from objects at rest. At most conceivable speeds on Earth, this isn’t noticeable.

Researchers at Huawei and the Huazhong University of Science and Technology in China capture dynamic motion in 3D, including the human body.

Other motion-sensing systems, like Microsoft Kinect, for example, rely on stationary cameras that view body movements. If a person is within the camera’s field of view, these systems work well.