14-07-2012, 10:50 AM
MOTION CAPTURE
MOTION CAPTURE.pptx (Size: 2.11 MB / Downloads: 52)
INTRODUCTION
Animating virtual humans thanks to motion capture data generally requires lots of pre computation and manual editing. Firstly motion capture data generally contain some holes and the Cartesian position of surface markers must be converted into joint angles. Motion Builder (product of Autodesk) and IQ for Vicon systems (product of Oxford Metrics).
Secondly motion capture data should be applied to the virtual character (called motion retargetting) that is used in the application leading to some corrections when the feet are not in contact with the ground during contact phases for example. Thanks to some research works in computer animation, this task can be performed almost automatically in a pre computation step. Then, new problems occur when this animation has to be applied to interactive environments such as video games In the real-time engine, the 3D environment may be different from the one in which the actor performed his motion.
What is Motion Capture ?
Motion capture (MOCAP) is an effective 3D animation tool
for realistically capturing human motion.
It is a process by which a movement can be recorded
as digitally.
Motion Capture of an object involves sensing , digitizing
and recording that object in motion.
– Whole body
– Hands
– Face
_ Joints
Purpose of Motion Capture
Originally used for military tracking purposes.
In sports, motion capture acts as a tool for biomechanic
research that is focused on the mechanical functioning of
the body, like how the heart and muscles work & move.
Marker Placements
Location should move rigidly with joints.
Stay away from bulging muscles.
Markers should not get overlapped.