Optitrack rigid body tool

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Your cart is empty. Clear Cart View Cart. Developer Tools What data are you looking for? Forums Join our community. This not only reduces processing loads for the rigid body solver, but it also improves the tracking stability. Not having unique rigid bodies could lead to labeling errors especially when tracking several assets with similar size and shape. The key idea of creating unique rigid body is to avoid geometrical congruency within multiple rigid bodies in Motive.

Having multiple non-unique rigid bodies may lead to mislabeling errors. However, in Motive, non-unique rigid bodies can also be tracked fairly well as long as the non-unique rigid bodies are continuously tracked throughout capture. Motive can refer to the trajectory history to identify and associate corresponding rigid bodies within different frames.

Even though it is possible to track non-unique rigid bodies, it is strongly recommended to make each asset unique. Tracking of multiple congruent rigid bodies could be lost during capture either by occlusion or by stepping outside of the capture volume. Also, when two non-unique rigid bodies are positioned in vicinity and overlap in the scene, their marker labels may get swapped.

If this happens, additional efforts will be required for correcting the labels in post-processing of the data. Depending on the object, there could be limitations on marker placements and number of variations of unique placements that could be achieved.

The following list provides sample methods for varying unique arrangements when tracking multiple rigid bodies.

Create Distinctive 2D Arrangements. Create distinctive, non-congruent, marker arrangements as the starting point for producing multiple variations, as shown in the examples above. Vary heights. Use marker bases or posts, with different heights to introduce variations in elevation to create additional unique arrangments.

Vary Maximum Marker to Marker Distance. Increase or decrease the overall size of the marker arrangements. Add Two or more Markers Lastly, if an additional variation is needed, add extra markers to introduce the uniqueness.

We recommended adding at least two extra markers in case any of them is occluded. A set of markers attached to a rigid object can be grouped and auto-labeled as a rigid body. This rigid body definition can be utilized in multiple takes to continuously auto-label the same rigid body markers. Motive recognizes the unique spatial relationship in the marker arrangement and automatically labels each marker to track the rigid body.

At least three coordinates are required to define a plane in 3D space, and therefore, a minimum of three markers are essential for creating a rigid body. If the rigid bodies, or skeletons, are created in the Edit mode, the corresponding Take needs to be auto-labeled. Only then, the rigid body markers will be labeled using the rigid body asset and positions and orientations will be computed for each frame. Rigid body properties consist of various configurations of rigid body assets in Motive, and they determine how rigid bodies are tracked and displayed in Motive.

For more information on each property, read through the Properties: Rigid Body page. When multiple rigid bodies are selected, context-menu applies only to the primary rigid body selection only. The primary rigid body is the last rigid body you selected, and its name will show up on the bottom-right corner of the 3D viewport. Created rigid body definitions can be modified using the editing tools in the Builder pane or by using the steps covered in the following sections.

The pivot point of a rigid body is used to define both position and orientation. When a rigid body is created, its pivot point is be placed at its geometric center by default, and its orientation axis will be aligned with the global coordinate axis. To view the pivot point and the orientation in the 3D viewport, set the Pivot and Orientation to true under the display settings of a selected rigid body in the Properties pane.

Position and orientation of a tracked rigid body can be monitored in real-time from the Info pane. You can simply select a rigid body in Motive and open the Info pane to view respective real-time tracking data of the rigid body. As mentioned previously, the orientation axis of a rigid body, by default, gets aligned with the global axis when the rigid body was first created.

After a rigid body is created, its orientation can be adjusted by editing the rigid body orientation using the Builder pane or by using the GIZMO tools as described in the next section. There are situations where the desired pivot point location is not at the center of a rigid body. The location of a pivot point can be adjusted by assigning it to a marker or by translating along the rigid body axis x,y,z. A robust solver will also perform precision marker labeling and skeletal tracking even when many markers are hidden from cameras or lost, providing more reliable tracking data and vastly reduced editing time across all applications.

Active and Passive tracking. Continuous Calibration. Dramatically reduces operator workload while consistently improving data quality. Setup and operation is easy. Motive makes system setup easy. Aim Assist, auto-masking, one-click rigid body creation, versatile hardware and the industry's longest range cameras make even large systems easy to set up with just one person.

Forceplate and EMG integration. Native, plug-and-play support for all major digital force plates AMTI, Bertec and Kistler , Delsys EMG, and analog devices, providing researchers the tools they need most for real-time display, reporting and analysis. Motive gives users the choice between turn-key pipelines, or customized outputs for unique requirements. Track way more stuff. Motive:Body offers a library of predefined markersets, including many which are scientifically and clinically validated and used in dozens of peer-reviewed scientific publications.

Manual 3D digitization ready. Precisely digitize objects both large and small using the OptiTrack Micron Probe. Easy to use software workflows enable fast and accurate 3D characterization of an infinite number of surfaces and objects, with world leading accuracy. One-click subject calibration.