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Traditional marker based systems apply up to 350 markers to the actors face and track the marker movement with high resolution cameras. This has been used on movies such as The Polar Express and Beowulf to allow an actor such as Tom Hanks to drive the facial expressions of several different characters. Unfortunately this is relatively ...
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 ...
Moiré Phase Tracking (MPT) is 3D tracking technology developed by Metria Innovation based on optical moiré patterns. [1] Moiré phase tracking is an approach to deriving three dimensional spatial and rotational information of tracked objects. By fixing a special marker with designs that result in moiré patterns, a camera can infer the pose ...
The automatic tracking has to be monitored for accuracy and may require manually relocating the markers or bodies. After the tracking data is generated for each marker or body of interest, the tracking is applied to the local anatomical bodies. For example, markers placed at the hip and knee would track the motion of the femur.
Fiducial marker present on an arch of the Colosseum. The appearance of markers in images may act as a reference for image scaling, or may allow the image and physical object, or multiple independent images, to be correlated. By placing fiducial markers at known locations in a subject, the relative scale in the produced image may be determined ...
Software collects all of the 360 degrees of freedom movement of the camera as well as metadata such as zoom, focus, iris and shutter elements from many different types of hardware devices, ranging from motion capture systems such as active LED marker based system from PhaseSpace, passive systems such as Motion Analysis or Vicon, to rotary ...
Metria Innovation was founded in 2008 [1] to commercialize Moiré Phase Tracking (MPT) technology that uses a single camera for motion capture. Metria is based in Wauwatosa, Wisconsin . The underlying research that developed the Moiré Phase Tracking was funded privately and through grants from the National Institutes of Health through a Small ...
Once the real camera position is known a virtual camera can be positioned at the same point and 3D computer graphics models drawn exactly overlaid on the real marker. So ARToolKit solves two of the key problems in Augmented Reality; viewpoint tracking and virtual object interaction.