Motion analysis

Motion analysis provides systematic, time-dependent and quantitative data on any movement captured using digital video, as recorded in moving image collections. It is related to motion capture, which is the process of recording movement and translating that movement onto a digital model.

There are three main types of motion analysis:

  • Human activity recognition: compares movement in a video with pre-existing prototypes to determine whether or not the movement is being performed by a human (often used in surveillance)
  • Human motion tracking: uses image feature measurement techniques to determine the relative locations of different attributes such as position, colour, shape and texture, between different frames of a video
  • Motion analysis of body parts: used to track the location of body parts in relation to each other during movement; in particular this method is used to identify ways to reduce stress on parts of the body to prevent strain injuries

As well as analysing human movement, motion analysis techniques are also used to detect inefficiencies or malfunctions during the manufacturing process of various products, and to track particles, e.g. bacteria or viruses, or larger objects, e.g. measuring flight trajectories.

Related methods include: Image feature measurement and Motion capture.

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