In addition to the following information, see also the Vicon video: 5 - Shogun Live - System Health and Camera Fixing.
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Vicon cameras with accelerometers (Vicon Vantage, Vero, Vue, and Valkyrie), provide a bump detection feature. On these cameras, the status indicators flash blue when the camera is bumped and (on Valkyrie and Vantage cameras only) the display changes to indicate a bumped camera. In the Vicon Shogun Live System panel, icons are displayed to the right of the camera names to indicate a bump.
To prevent you from having to recalibrate the whole system after a camera has received a minor bump, when a calibrated subject (or prop, or wand) moves through the volume, cameras automatically detect whether further action is necessary:
As an additional check, in the System panel click the camera with the bumped icon to select it and in a Cameras view, zoom in on the markers. When a camera is bumped, red warning symbols are displayed, indicating the difference between where the system expects the markers to be, and where they actually are.
Shogun Live enables you to quickly correct a camera whose position has changed due to having been bumped or moved, using any labeled object in the volume – subject, prop, or wand, and the Recover Camera Pose feature.
Important You can use Recover Camera Pose to recover cameras that have been either bumped or moved. This process relies on having enough cameras within a calibrated system to act as a calibration anchor. For this reason, it is recommended that it is run on only a small proportion of the cameras in a system. A single camera or a small number of affected cameras can be recovered with good results. If a larger number of cameras is affected, perform a full camera calibration instead (see Calibrate cameras). |
The following procedure corrects a bumped optical camera (Vantage or Vero): for bumped video cameras, see Correct a bumped Vicon Vue video or SDI video camera.
In the volume, have the subject move (or move the labeled object) in front of the affected camera.
In the 3D Scene view and Cameras view, you can see orange trails as the system determines the offset between the camera and the rest of the calibration.
Note that to correct a Vue camera, you need to use active markers, so ensure you have a Vicon Active Wand to use during the procedure.
With the video camera(s) still selected, in the Calibration Wave section, select Start Wave (Selected) and, with Auto Stop selected, wave the wand for just the selected cameras and wait for the calibration to finish.
In the 3D Scene and the Cameras view, the camera view is covered with orange trails.