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After you have captured a wand wave, you set the volume origin and axes so the cameras and volume in Shogun Live reflect the actual positions of the cameras in relation to the capture volume, as well as to each other.

1. To enable you to see the axes in relation to the volume, on the Workspace tab, change the view to 3D Scene.

   

2. Place the calibration device on the capture volume floor in the position you want the volume origin to be and in the orientation you want the axes to be (reflected in the axes displayed in the 3D Scene view).

   

   • X: red line
   • Y: green line
   • Z: blue line

3. At the top of the Camera Calibration tab, in the Wand list, ensure the appropriate Active Wand is selected.

   Tip: If you're working in a Y-up coordinate system, display the Advanced properties and in the Set Volume Origin section, select Legacy Y-Up Scene Orientation.
4. Click Start Set Origin.
   The button displays Set Origin.
5. After a few seconds, click Set Origin.
6. In the 3D Scene, display the View Filters options and under the Volume options, ensure that Cameras is selected.

   

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7. In the 3D Scene, Perspective view, all of the cameras shift as a group, so the origin of the capture volume is aligned with the wand.

   

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Set the origin with a custom L-frame

To improve calibration stability and consistency over time, you can use a custom L-frame to set the origin of your system.

As described in Set the volume origin, you can use a Vicon Active Wand to set up your volume coordinate system quickly and easily. However, using a larger, custom calibration object (in this case, markers embedded in the volume floor and/or wall) can improve calibration stability and consistency over time.

A typical way to use a custom L-frame would be to keep markers on wall, hidden during camera masking, then when you're ready to set the coordinate system for your volume, make the markers visible and use the custom L-Frame as described below.

See also:

Vicon Shogun 1.3 Live Tutorial - Custom L-Frame Workflow on YouTube.

To create a custom L-frame:

1. With the system calibrated, set the origin as normal (see Set the volume origin), including setting the floor offset (see Set the floor plane), as required.
2. Position a number of markers on the edge of the volume and select them.

   

3. On the Tracking tab (right), in the Prop field, enter a name for the custom L-frame and click Create.

   

   The new custom L-frame prop is displayed in the 3D Scene view.
4. Pause the real time and in the Tracking panel on the right, select the prop you just created.

   

5. To display the Object Manipulator, press M. (For more information on the Object Manipulator, see Move props.) In the Workspace (3D Scene view), the Object Manipulator is displayed.

   

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6. In the Tracking panel on the right, ensure that the custom L-frame is still selected, and with the Object Manipulator set to Global, change all the values to zero, so the origin matches that of the L-frame.

   

7. In the Tracking panel, with the custom L-Frame selected, right-click and then click Export.

   

8. Navigate to Users\Public\Documents\Vicon\CalibrationObjects and click Select Folder. The custom L-frame is automatically saved as a VSK.

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To use the custom L-frame:

1. Click Play to resume the real time.
2. On the Camera Calibration tab (right), ensure the Advanced options are displayed (if not, click Show Advanced, top right).
3. To the right of Start Set Origin, click the button for additional options.

   

4. In the L-Frame list, select the new custom L-frame.

   

5. Click Start Set Origin.
   The new custom L-frame is used to set the origin.
6. When done, click Complete Set Origin.