Configuring the Abandoned object detector VI

To configure the Abandoned object detector VI, do the following:

Go to the Detectors tab.
Below the required camera, click Create… → Category: Trackers → Abandoned object detector VI.

By default, the detector is enabled and set to detect abandoned objects.

If necessary, you can change the detector parameters. The list of parameters is given in the table:

Parameter	Value	Description
Object features
Video stream	Main stream	If the camera supports multistreaming, select the stream for which detection is needed
Other
Enable	Yes	By default, the detector is enabled. To disable, select the No value
Enable	No
Name	Abandoned object detector VI	Enter the detector name or leave the default name
Background accumulation	Yes	By default, scene background accumulation is enabled. To disable, select the No value
Background accumulation	No
Background training period (sec) (starting with Detector Pack 3.14)	25	Specify the time period in seconds during which the background is analyzed. The value must be in the range [-1, 10000000]
Decoder mode	Auto	Select a processing resource for decoding video streams. When you select a GPU, a stand-alone graphics card takes priority (when decoding with NVIDIA NVDEC chips). If there is no appropriate GPU, the decoding will use the Intel Quick Sync Video technology. Otherwise, CPU resources are used for decoding
	CPU
	GPU
	HuaweiNPU
Detection area sensitivity	Medium level	Select the detection area sensitivity. The Medium level of sensitivity is selected by default. Additional neural network processing is applied in this area
Detection area sensitivity	Low level
Detection mode	CPU	Select the processor for the detector operation (see Selecting Nvidia GPU when configuring detectors)
	Nvidia GPU 0
	Nvidia GPU 1
	Nvidia GPU 2
	Nvidia GPU 3
Detection sensitivity (%)	70	Specify the sensitivity level of the detector as a percentage. The value must be in the range [0, 100]
Error tolerance (starting with Detector Pack 3.14)	128	Specify the tolerance level. The lower the value, the higher the recognition accuracy, but the longer the processing time. The value must be in the range [32, 256]
Event intersection time (sec)	0.01	Specify the time interval in seconds during which events aren't processed after successful detection when the event results match. The parameter determines the level of intersection between new and previous events. If the specified value is exceeded, it is considered that these events refer to the same real object. The parameter is necessary to reduce the total number of events, since the analysis is performed continuously and the duration of real events can be several seconds. You must select the required value empirically. The value must be in the range [0, 1]
False detection filtering algorithm (starting with Detector Pack 3.14)	Accurate	Select the false detection filtering algorithm
	Quick	Select the false detection filtering algorithm
False detection filtering level (starting with Detector Pack 3.14)	8	Specify the level of filtering for monotonous and single-color triggers caused by changes in lighting. The value must be in the range [0, 100]
Foreground sensitivity	70	Specify the sensitivity of primary detection of objects in the foreground. The value must be in the range [0, 100]
Frame picking period (starting with Detector Pack 3.14)	67	Specify the time period in seconds between selection of frames for analysis. The value must be in the range [1,10000000]
Frame size change	640	Specify the size to which the video is compressed before analysis. The value must be in the range [480, 960]
Ignore time (sec)	0	Specify the time interval in seconds during which events aren't processed after successful detection. The parameter is necessary to reduce the total number of events, since the analysis is performed continuously and the duration of real events can be several seconds. You must select the required value empirically. The value must be in the range [0, 9999]
Maximum size of detected objects	100	Specify the maximum size of an object as a percentage to get an event from the detector. If objects are larger than specified, there are no events from the detector. The value must be in the range [0, 100]
Minimum size of detected objects	0	Specify the minimum size of an object as a percentage to get an event from the detector. If objects are smaller than specified, there are no events from the detector. The value must be in the range [0, 100]
Monotony filter	1	Specify the value of monotonous/single-color events filtering (for example, spots on the floor). The value must be in the range [0, 10]
Number of execution threads	4	Specify the number of execution threads. The value must be in the range [0, 100]
Number of frames processed per second	12	Specify the number of frames processed per second. The value must be in range [0.016, 100] Attention! The detector operates optimally with the default value for most use cases. Changing this value may reduce the detector's performance quality.
Object filter	Yes	By default, the neural network object filter is disabled. To enable, select the Yes value
Object filter	No
People flow intensity (%)	99	Specify the value as a percentage that is responsible for the detector's ability to detect objects when the camera FOV is heavily overlapped by people walking by. The value must be in the range [0, 100]
Person filter	Yes	By default, objects near people aren't ignored. To ignore objects near people, select the Yes value
Person filter	No
Saving background	Yes	By default, saving the scene background is enabled. To disable, select the No value Attention! Background files are automatically saved to the directory C:\ProgramData\VideoIntellect\. The size of this folder can quickly increase, potentially filling up all available space on the C drive. It isn't possible to set a limit on the maximum volume of this directory, so it’s important to periodically check its contents and clear it if necessary.
Saving background	No
Scene training period (sec) (starting with Detector Pack 3.14)	-1	Specify the time period during which the scene is analyzed. With the -1 value, the system automatically selects the time period. The value must be in the range [-1, 10000000]
Sensitivity of slight changes in background (%)	95	Controls the sensitivity to object contrast. Specify the value as a percentage that is responsible for the detector's ability to distinguish between objects that are less visible (that blend into the background). The higher the value, the less noticeable object can be detected. The value must be in the range [0, 100]
State saving interval	0	Specify the state saving interval in seconds. The value must be in the range [0, 9999]
Time for detection (sec)	120	Specify the time in seconds after which the object is considered abandoned. The value must be in the range [0, 9999]
Type	Abandoned object detector VI	Name of the detector's type (non-editable field)

In the preview window, specify the area in which the objects must be detected. You can set this area by using the anchor points (see Configuring a detection area).

Note

For convenience of configuration, you can "freeze" the frame. Click the button. To cancel the action, click this button again.
The detection area is displayed by default. To hide it, click the button (see Configuring a detection area). To cancel the action, click this button again.

To save the parameters of the detector, click the Apply button. To cancel the changes, click the Cancel button.

Configuring the Abandoned object detector VI is complete.

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Documentation for Axxon One 2.0. Documentation for other versions of Axxon One is available too.