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en | Configuration
FLEXIDOME indoor 5100i (IR) | FLEXIDOME
outdoor 5100i (IR)
11-2022 | V02 | F.01U.394.427
User manual
Bosch Security Systems B.V.
Only through use of perspective information is it possible to distinguish objects such as
persons, bicycles, cars and trucks, and accurately compute their real size and speeds 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.
Focal length [mm]
Enter the focal length in millimeters of the position of the camera if the value is not
determined by the camera.
The focal length is determined by the lens. The shorter the focal length, the wider the field of
view. The longer the focal length, the narrower the field of view and the higher the
magnification.
Show sensor values...
Click to automatically see the camera parameters, for example,
Tilt angle [°]
,
Roll angle [°]
and
Focal length [mm]
. These calibration values are measured by the device sensors. Click
OK
to transfer them to the
Positioning
settings page.
Sketch
Click to improve the automatic calibration. The
Sketch-based calibration
window is displayed.
The
Sketch
functionality offers an additional, half-automatic calibration method. This
calibration method allows you to describe the perspective in the camera’s field of view by
drawing vertical lines, ground lines, and ground angles in the camera image and entering the
correct size and angle. Use the
Sketch
functionality if the result of the automatic calibration is
not sufficient.
