Landmark definition: target
This tutorial shows how to define a landmark based on an existing target. This allows you to track an anatomical point from the static trial in dynamic trials as well, even if there is no physical marker at that location.
Model building
Landmark definition: projected
This tutorial shows how to define a landmark in Visual3D by projecting an existing landmark or target onto a plane. This is useful, for example, in tracking the motion of a subject’s center of mass with respect to the floor.
Landmark definition: global
This video shows how to define landmarks in Visual3D using your lab’s global coordinate system. A landmark is defined by its X, Y, and Z offsets from the lab’s origin point; this can be especially useful in creating a virtual lab.
Landmark definition: segment
This tutorial shows you how to define a landmark using the coordinate system of an entire segment. This can be useful when definition markers might become occluded or when the landmark doesn’t correspond to existing points.
Landmark definition: 3 points
This tutorial shows how to define a landmark in 3D space in Visual3D. When you use three points for reference, you can specify offsets along the X, Y, and Z axes, giving you full control over where in virtual space to place your landmark.
Static vs dynamic
This tutorial explores the differences between static and dynamic trials and how they are used in Visual3D. A static trial is used to define the biomechanical model that is applied to dynamic recordings.
Landmark definition: 2 points
This tutorial shows how to track a point of interest located on a line between two other points. This is useful for tracking points that cannot be directly defined by markers, such as the knee joint center.
Landmark definition: 1 point
Not all points of interest for motion capture can be tracked by markers. This video explains how landmarks solve this problem and shows how to use Visual3D to define a landmark using a single point.
Segment tracking
This tutorial shows how to track a segment in Visual3D using a separate set of markers from the ones used to define the segment. This can solve problems like skin movement artefact and camera occlusions.
Segment joint definition: extra target
In Visual3D, each end of a segment can be defined with a single marker and the joint radius, but you will need a third point to track the segment’s orientation.