Use Recover Camera Pose
- Gisela Roberts
Evoke enables you to quickly correct a camera whose position has changed due to having been bumped or moved. To do this you use:
- Any visible markers in the volume and
- The Recover Camera Pose feature
You can use this feature in conjunction with the bump notifications, where you can heal cameras identified as having been knocked by using Recover Camera Pose.
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, we recommend 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).
Correct a bumped or moved optical camera
The following procedure corrects a bumped optical camera (Valkyrie, Vantage or Vero):
- In the System panel, select the camera that was bumped or moved.
- In the Camera Calibration panel, click Start Recover Camera Pose.
In the volume, move the markers in front of the affected camera.
In the 3D View and Cameras view, you can see orange trails as the system determines the offset between the camera and the rest of the calibration.
- When enough of the view and the camera's frustum have been covered (indicated by orange trails showing the path of the markers in the affected camera view, as shown above), click Stop Recover Camera Pose.
- To confirm that the camera has been successfully healed, check that the camera has good Centroid Connectivity and Image Error, either in the System Health Report or via the icons in the Cameras view (see Understand the System Health Report and About the Cameras view).
The camera is now correctly aligned with the rest of the system.
Note that masking of the affected camera is not preserved, so for optimum results, you may need to mask the affected camera again. For information, see Mask cameras.
