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Reference image comparison
The live camera image is compared to a defined reference image of the same camera view (see Manual reference image comparison). An alarm will be triggered if the images
do not match and triggers a second alarm when the original camera view is restored. This feature is used to monitor gradual changes within a camera image.
- Select Reference image comparison in the 'Server side functions' menu.
- To activate the automatic image reference comparison, select Yes
from the drop-down-menu.
- Click Create reference image to select an image from the camera that serves as a backdrop for the motion detection.
- Select Show differences only to show only the differences between the live-image and the reference image.
- Adjust the Alert threshold (tolerance) in percent. An alarm will b e triggered only if the differences between the live image and reference image are above the threshold.
- If you prefer, select 'Archive mode' to select a pre-recorded frame as the baseline. Click the calendar icon to specify date and time for the frame.
- Specify the values for the Execution time by defining the time interval (in minutes, at a certain day time or on certain days per week at a specific time) for the comparison between the reference image and the live image.
- Click Save when done.
If you want to be alerted when these conditions are met, be sure that the event 'Reference Image Events' is selected in the Ocularis Recorder Proxy. Then, in Ocularis Administrator, set an alert for this event on the camera as you would any other event.
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