After you install a dash cam and enable AI Event Detection, the Samsara CM3x Dash Cam automatically detects the vanishing point (the point where the center of the lane and the horizon line meet). This camera calibration requires 30 minutes at speeds greater than 45 mph. If you need to trigger events before calibration is complete, you can Manually Configure Calibration for the vanishing point.
During calibration, the dash cam uses the default lane positions and assumes that the camera position is perfectly centered on the lane and horizon. To verify the dash cam position, Test Dash Cam Positioning.
After calibration, the dash cam automatically re-calibrates every two weeks to ensure that it can accurately detect safety events such as Unsafe Following Distance Detection and Forward Collision Detection [Beta]. If either detection type is enabled and an event is detected before calibration is complete, the vehicle receives an in-cab audio alert and the event is automatically marked with a Dismissed status (Safety > Safety Inbox > Dismissed) in the Samsara dashboard.
The dash cam automatically determines the vanishing point and the camera height based on vehicle type. If you need to adjust the camera height, you can manually adjust this setting on a per-vehicle basis or when you Enable and Configure AI Event Detection.
To manually configure the vanishing point:
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Select the Settings icon (
) at the bottom of your Fleet menu to view dashboard settings. -
From Fleet settings, select Safety > Event Detection.
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Within AI Event Detection, click Camera Calibration Settings.
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If desired, use the search to quickly locate a dash cam by device name, or narrow the scope of the result with tags or Filter by Camera Configuration (Unconfigured or User Configured).
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On the image thumbnail, select the more actions menu (...) > Edit.
The crosshairs turn from green to blue during editing.
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Click the location where the center of the lane and the horizon line meet to set the vanishing point. For example:
The vanishing point saves automatically.
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To improve the accuracy of detection, reset the calibration (select the more actions menu (( ... ) > Reset) after you calibrate manually. Resetting the calibration ensures that the camera continues to calibrate automatically.
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