Motion capture is the method of capturing event or human movement. This is used to verify computer vision and robotics in military, entertainment , sports, medical applications and. It refers to documenting actions of human actors in film making and video game production, and using that knowledge to animate digital character models in 2D or 3D computer animation. This is also referred to as performance capture as it involves face and hand, or captures subtle gestures. Movements of one or more actors in motion capture sessions are captured several times a second.

Although early techniques used images from multiple cameras for measuring 3D locations, the aim of motion capture is now to record only the actor's gestures, not his or her visual appearance. The animation data is converted to a 3D model, and the character carries out the same actions as the actor. Scene gestures may also be filmed in motion so that when the actor is acting, a virtual scene in the scene can rotate, turn or dolly around the stage powered by a camera operator. Around the same moment, both the camera and props and the actor's performance can be filmed by the motion capture system.

A computer processes the data and shows the actor 's movements, offering the ideal location of the camera in terms of objects in the sequence. Retroactively collecting camera motion data from the captured video is known as moving match or tracking device.

Advantages
  • Low latency, data can be obtained almost in real time. That can reduce the cost of key-frame based animation in entertainment applications. (Example: Hand Over Technique)
  • The amount of work does not differ to the same degree as when using conventional methods, with the difficulty or duration of the performance. This helps you to do other experiments of various types or delivery, offering a particular personality limited only by the actor's talent.
  • It is easy to replicate complex movement and practical physical movements such as secondary gestures, weight and exchange of forces in a physically accurate manner.
Disadvantages
  • It requires different hardware and special software programs to capture and process the data.
  • The cost of the necessary software, facilities, and staff may be prohibitive for small productions.
  • When there are issues, shooting the scene again is simpler than attempting to manipulate the data. Only a few systems allow the data to be displayed in real time to determine if the take needs to be redone.
  • The initial findings are limited to what can be achieved within the volume of the capture without the additional data editing.
  • It is difficult to catch movement which does not follow the laws of physics.
These are films that use motion capture by taking actors in specialized suits and applying to their performances digital animation.
  • Aladdin (2019 Movie)
  • Alita Battle Angel (2019 Movie)
  • Ant-Man and the Wasp (2018 Movie)
  • Avatar (2009 Movie)
  • The Avengers (Movie Series)
  • Dawn of the Planet of the Apes (Movie Series)
  • Fantastic Four (2015 Movie)
  • Guardians of the Galaxy (Movie Series)
  • The Hobbit (Movie Series)
  • Kong Skull Island (2017 Movie)
  • The Lion King (2019 Movie)
  • The Lord of the Rings (Movie Series)
  • Pirates of the Caribbean (Movie Series)
  • Thor Ragnarok (2017 Movie)
  • Valerian and the City of a Thousand Planets (2017 Movie)
  • Venom (2018 Movie)
New approaches have been developed since the beginning of the 21st Century, and because of the exponential growth in technology. Many modern devices will remove the performer's silhouette from behind the scenes. All joint angles are determined afterwards by fitting into the outline in a mathematics model. You can't see a silhouette transition for movements, there are hybrid systems available that can do both (marker and silhouette), but with less marker. Many motion capture systems in robotics are based on simultaneous localisation and mapping.