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FLEXIDOME micro 3100i Configuration | en 27
Bosch Security Systems B.V.
User manual
2023-11 | V01 | F.01U.408.367
Select the background color for the alarm message to be displayed in.
If you have enabled the Transparent background option, the background color is not
displayed in the OSD.
Stream security
Select from the Video authentication drop-down box a method for verifying the integrity of
the video.
If you select Watermarking, all images are marked with an icon. The icon indicates if the
sequence (live or saved) has been manipulated.
If you want to add a digital signature to the transmitted video images to ensure their
integrity, select one of the cryptographic algorithms for this signature.
Set the Signature interval [s] for the selected authentication method.
Click Set to apply the changes.
5.4.3 Positioning
The Positioning feature describes the location of the camera and the perspective in the
camera’s field of view.
Perspective information is essential to Video Analytics, as it enables the system to
compensate for the illusory smallness of distant objects.
Only through use of perspective information is it possible to distinguish objects such as
persons and cars, and accurately compute their real size as they move through 3D space.
However, to calculate perspective information accurately, the camera must be directed at a
single, flat horizontal plane. Multiple and inclined planes, hills, stairs can falsify perspective
information and produce incorrect object information such as size and speed.
Mounting position
The mounting position describes the perspective information that is also often called
calibration.
In general, the mounting position is determined by the parameters of the camera such as
height, roll angle, tilt angle, and focal length.
The height of the camera must always be entered manually. Whenever possible, roll angle
and tilt angle are provided by the camera itself. The focal length is provided, if the camera
has a built-in lens.
Tilt angle [°]
Enter the tilt angle if the value is not determined by the camera.
The tilt angle describes the angle between the horizontal and the camera.
A tilt angle of 0° means that the camera is mounted parallel to the ground.
A tilt angle of 90° means that the camera is mounted vertically in bird’s eye view
perspective.
The flatter the tilt angle is set, the less accurate the estimate of object sizes and speeds will
be. The settings must be between 0° and 90°. Estimates are no longer possible when you
have reached 0°.
Roll angle [°]
Enter the roll angle if the value is not determined by the camera.
The roll angle describes the angle between the roll axis and the horizontal plane. The angle
can deviate from the horizontal by up to 45°.
Height [m]
Enter the height in meters of the position of the camera.
The height describes the vertical distance from the camera to the ground plane of the
captured image. Typically the elevation of the mounted camera above the ground.
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