For each type of situation analysis detection tool you must set a virtual element of one of two types:

  1. A line
  2. An area

Attention! If no visual element is set, the detection tool will not work.
The type of visual element is determined by the detection type. Only the Line crossing detection requires you to set a Line element. Other situation analysis detection tools require you to set an Area element for each detection tool.

Line

The Line visual element sets a virtual line in the field of view of a video camera; when something crosses this line, it triggers the Line Crossing detection tool.
To set a line, you must perform the following steps:

  1. In the list of detection tools, highlight a Line Crossing object (1).

  1. In the viewing tile (2), set the endpoints of the line which, when intersected, will trigger Line Crossing detection.

Note: When the line is being constructed, the end points are connected by a two-color dotted line. The direction of the object's motion across the line is indicated by dotted arrows (2).

Action

Result

Left-click in the viewing tile

Creates a line end point

Position the cursor on an end point and, holding down the left mouse button, move the mouse

Moves the line end point

Click the button

Deletes the line

  1. By default, Line Crossing detection monitors object motion across the line in both directions. To suspend detection of motion in one direction, click the button corresponding to that direction.

Attention! At least one direction must be selected for detection.
Note: An unmonitored direction of object motion is indicated by a dimmed arrow.

  1. Click the Apply button.

The line is now set.

Area

The Area visual element sets an area of a video camera's field of view, in which the situation is analyzed by a detection tool of the selected type.
To set an area, you must perform the following steps:

  1. In the Detection Tools list, highlight the Detection Tool object for which you need to set an area (1).

  1. In the viewing tile (2) set the nodes of the area, in order, in which the situation requires analysis.

Note: When the area is being constructed, the nodes are connected by a two-color dotted line which outlines the area's borders.

Action

Result

Left-click in the viewing tile

Creates a new area node

Right-click on a created node

Deletes the area node

Position the cursor on a node and hold down the left mouse button while you move the mouse

Moves the area node

Click the button

Deletes the area

  1. Click the Apply button.

The area is now set.