Axis Communications Q6045-E user manual Basic Video Analytics, Object Removed

AXIS Q6045-E Mk II PTZ Dome Network Camera

Detectors

Parameter	Object Size	History	Sensitivity
Description	Object size relative to window	Object memory length.	Difference in luminance
	size.		between background and
			object.
High level (100%)	Only very large objects trigger	An object that appears in	Ordinary colored objects on
	motion detection.	the window triggers motion	ordinary backgrounds trigger
		detection for a long time	motion detection.
		before it is considered as
		non-moving.
Medium level (50%)			A large difference in luminance
			is required to trigger motion
			detection.
Low level (0%)	Even very small objects trigger	An object that appears in	Only very bright objects on
	motion detection.	the window triggers motion	a dark background trigger
		detection only for a very short	motion detection.
		time before it is considered as
		non-moving.
Recommended values	5–15%	60–90%	75–95%
Default values	15%	90%	90%

Note

•To trigger on small objects or movements, use several small motion detection windows rather than one large window and select a low object size.

•To avoid triggering on small objects, select a high object size.

•While monitoring an area where moving objects are not expected, select a high history level. This will cause motion detection to trigger as long as the object is present in the window.

•To only detect flashing light, select a low sensitivity. In other cases high sensitivity is recommended.

Basic Video Analytics

The Basic Video Analytics section include the following detectors:

•Object Removed, see page 32

•Enter/Exit Detector, see page 33

•Fence Detector, see page 34

•Object Counter, see page 34

Important

•To activate a detector, the saved preset must be selected in the drop-down list. The detector will only be enabled at the preset, see Preset Positions on page 25. Note that the Area of interest and Object size are not visible in Preset Positions, only under the Detectors menu. If the pan/tilt/zoom position is changed, the detector is disabled.

•The detector will not register an object if the speed of the object is too high, if the object is too close to the camera, if the difference in luminance between the object and the background is insufficient, or if the camera is autofocusing.

Object Removed

Object Removed is used to trigger an alarm if a detected object within a pre-defined area of interest has disappeared. Do the following to set the detector:

Note

Use the Drawing Opacity slidebar to define how transparent the area of interest or object size shape should be. Note that this change will not be saved.

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