The document provides an overview of motion capture (mocap), detailing its introduction, history, techniques, applications, advantages, and disadvantages. It highlights the evolution of mocap from basic systems to advanced technology and outlines various applications in entertainment, medicine, sports, and science. The document emphasizes both the benefits of realistic movement recreation and the challenges involved with hardware and situational requirements.

1. Motion Capturing
Sri Harsha Dokula

2. Contents
● Introduction
● History
● Techniques of Motion Capturing
● Production pipeline
● Applications
● Advantages and Disadvantages
● Conclusion
● References

3. Introduction
● Motion capture is the process for recording the movement of objects or
people.
● Motion capture technology involves sensing , digitizing and recording the
object in motion.
● Also known as MOCAP in short or performance capture.

5. History
● Motion Capture was first developed in the late 1800’s by
Muybridge.
● Started as a analysis tool in biomechanics for study of motion of various
animals.
● Max Fleischer developed “ROTOSCOPING” technique for
animations in 1970’s.

6. ROTOSCOPING
Process -
● Capture
● Trace
● Post processing

7. Capture-
Rotoscoping works by first capturing a video of real actors around the props.
Tracing-
Animators then trace over each frame of the recorded video, this would result in a figure that
moves in a very realistic fashion.
Post processing-
Finally, the animated figures would be coloured and then integrated with various background
layers to create a final shot.

8. Techniques of MOCAP
1. Mechanical Capture
2. Magnetic Capture and
3. Optical Capture

9. Mechanical Capture
● The person wears an exoskeleton over his body which has angle encoders at
the joints.
● The skeleton data recorded is processed and a 3D model is generated .

10. Magnetic Capture
● The person wears a suit fitted with several magnetic sensors.
● The low-frequency magnetic field generated is received by central magnet.
● The sensors provide positional and rotational information which will be
rendered into a 3D model.

12. Optical Capture
● The suit is fitted with reflective markers at specific places over the body.
● The infrared rays reflected by the markers are picked up by the special
cameras and later transformed into digital form.

14. Production pipeline

15. Applications
● Entertainment
● Health and Medicine
● Sports
● Science

16. Entertainment

17. Health and Medicine
In Health & Medicine mocap is used in performing various tests on user.
For better visualization of movements of body parts .
Example: Gait analysis.

18. sports
In Sports mocap is used for increase in performance of players, by better
understanding the motion of player, better visualization, digitation plays major role
in every game.
In cricket, for verifying the action of bowlers mocap is used.
Example: Injury prevention.

19. Science
In science it used for ergonomic product designs.
Example: Development of Biped robots.

20. Advantages
● Complex movements and realistic physical interactions such as secondary motions ,
weights and exchange of forces can be easily recreated in a physically accurate manner.
● The amount of animation data that can be produced within a given time is extremely large
compared to traditional animation techniques.
● Potential for free software and third party solutions reducing costs.

21. Disadvantages
● Specific hardware and special software programs are required to obtain the data.
● When problems occur , it is easier to reshoot the scene rather than trying to manipulate
the data.
● The capture system may have specific requirements for the space it is operated in,
depending on camera field of view or magnetic distortion.

22. Conclusion
Motion capture systems have evolved from simple , user unfriendly systems to very mobile and
specialized ones.

23. References
● https://en.wikipedia.org/wiki/Motion_capture
- For general information.
● https://www.qualisys.com/applications/equine-animal/animal-bio/-
- For applications .
● http://www.ijritcc.org/download/IJRITCC_1350.pdf
- Journal on MOCAP.

24. Any Questions?

25. Thank You