Canon VB-H43 Operation Manual page 117

Detect criteria for [Camera Tampering Detection]
For [Camera Tampering Detection], the entire image
display area becomes the detection area. "Detected"
mode will be triggered to ON when the image is
obstructed over an area exceeding the ratio set in
[Change Ratio (%)].
When [Change Ratio (%)] is changed, an indicator frame
representing the area that can be obstructed is displayed
for 1 second in the center of the image display area. This
allows you to check the change ratio of the camera
tampering detection area, which occupies the entire
image display area, while specifying the [Change Ratio
(%)] setting.
Any moving objects detected are shown with contour
lines. If it is smaller than [Change Ratio (%)], contour lines
are white. If the image is changed for an area larger than
[Change Ratio (%)], contour lines take on the same color
as the detection area, indicating that "detected" mode
has been triggered to ON.
Note
Detection will not be possible for three seconds after the change
ratio is modified when camera tampering detection is selected, or
when switching into camera tampering detection from another
detection mode.
Obstructed area
indicator
Contour of camera
tampering object
Detect criteria for [Passing Detection]
Set the passing direction and decision point of the moving
object for the detection line that the moving object will
cross.
[Passing Direction]
Select the direction for moving objects to pass the
detection line. When an object that moves in the selected
direction passes the detection line, "line crossed" is
detected.
A preview display shows the selected passing direction
on the detection line in the image display area.
[Decision Point]
Select the decision point of a moving object in
accordance with a detection line. When a decision point
selected here crosses the detection line, "line crossed" is
detected. In the image display area, a cross mark is
displayed to indicate the decision point in the detection
frame.
Detection line
[Object Size (%)]
Enter or use the slider to set the size ratio of moving
objects for the entire screen.
When a moving object exceeds the value set for [Object
Size (%)], it becomes a passing detection target.
When [Object Size (%)] is changed, an indicator frame
showing the size of the object is displayed for 1 second in
the center of the image display area, allowing
specification of the settings while checking the size ratio.
Intelligent Function Setting Tool
Detection frame
Decision point
Object size indicator
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