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en | Configuration
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.
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.
You can also combine this manual calibration with the values for roll angle, tilt angle, height
and focal length calculated by the camera or entered manually.
Select the Calculate check box to obtain the roll angle, tilt angle, height and focal length
from the sketched calibration elements - vertical lines, ground lines and angles - you have
placed in the device.
Clear the Calculate check box to enter a value manually or to refresh to the values provided
by the device itself.
Assisted calibration with Configuration Manager
Calibration leverages data from the device's internal sensors and/or direct user input.
With Configuration Manager the device can be calibrated using the map-based calibration
feature, which allows fast and easy calibration by marking ground points on the map and
image.
Alternatively, the user can still resort to the Sketch-based calibration to manually input the
calibration values.
Refer to the Configuration Manager Online help content to learn more about assisted
calibration methods.
Calibrating cameras using the Sketch-based calibration window
To determine non-automatically set values:
1.
2.
2023-11 | V01 | F.01U.408.367
Enter the value for tilt angle, roll angle, height and focal length if the value is known,
for example, by measuring the height of the camera above the ground, or reading the
focal length from the lens.
For each value that is still unknown, select the Calculate check box, then place a
calibration element on the camera image. Use these calibration elements to trace
individual outlines of the displayed environment in the camera image and define the
position and size of these lines and angles.
–
Click
to place a vertical line across the image.
A vertical line corresponds to a line that is perpendicular to the ground plane, such
as a door frame, edge of a building or a lamp post.
–
Click
to place a line across the ground in the image.
A line on ground corresponds to a line that is on the ground plane, such as a road
marking.
User manual
FLEXIDOME micro 3100i
Bosch Security Systems B.V.
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