Editing Motion capture (section)

===Time modulated active marker===
[[Image:Activemarker2.PNG|thumb|300px|A high-resolution uniquely identified active marker system with 3,600 × 3,600 resolution at 960 hertz providing real time submillimeter positions]]
Active marker systems can further be refined by strobing one marker on at a time, or tracking multiple markers over time and modulating the amplitude or pulse width to provide marker ID. 12-megapixel spatial resolution modulated systems show more subtle movements than 4-megapixel optical systems by having both higher spatial and temporal resolution. Directors can see the actor's performance in real-time, and watch the results on the motion capture-driven CG character. The unique marker IDs reduce the turnaround, by eliminating marker swapping and providing much cleaner data than other technologies. LEDs with onboard processing and radio synchronization allow motion capture outdoors in direct sunlight while capturing at 120 to 960 frames per second due to a high-speed electronic shutter. Computer processing of modulated IDs allows less hand cleanup or filtered results for lower operational costs. This higher accuracy and resolution requires more processing than passive technologies, but the additional processing is done at the camera to improve resolution via subpixel or centroid processing, providing both high resolution and high speed. These motion capture systems typically cost $20,000 for an eight-camera, 12-megapixel spatial resolution 120-hertz system with one actor.

[[Image:PrakashOutdoorMotionCapture.jpg|thumb|300px| [[Infrared|IR]] sensors can compute their location when lit by mobile multi-LED emitters, e.g. in a moving car. With Id per marker, these sensor tags can be worn under clothing and tracked at 500 Hz in broad daylight.]]