Camera Installation
The Camera Installation Mode has 3 options:
Fixed/PTZ: [Default] The stabilization algorithm parameters are optimized to give
the best stabilization results for fixed/PTZ cameras.
In vehicle/Hand held: The stabilization algorithm parameters are optimized to give
the best stabilization performance for cameras where the camera fixture experiences
continued, large displacements or scene changes. E.g. when shot from a moving
vehicle.
Low Frequency Stabilization: The above 2 stabilization modes are designed to allow
tracking of intentional camera panning by not stabilizing low frequency movements (<
1Hz). The Low Frequency mode has a lower cut-off frequency to allow better low
frequency stabilization at the expense of worse tracking of intentional movement (see
Attenuation vs Frequency graph on the last page). This mode will automatically switch
to the higher frequency mode when excessive movement in one direction is detected
in order to allow better tracking of intentional movement. Once this movement has
stopped it will revert back to the low frequency mode.
Auto Disable
There are 2 options for Auto Disable - neither is selected by default:
Pan/Tilt: This option disables the stabilization when excessive pan or tilt motion
is detected. This makes it easier to control pan/tilt cameras because the Stabilizer
ceases to oppose operator pan/tilt commands above the threshold. Once panning
stops, there is a 3 sec timeout period before stabilization is reactivated.
Low Detail: When this option is enabled, the algorithm is disabled when a scene
with insufficient detail for reliable stabilization is detected. This prevents the image
position ‘hunting’ when there is very little scene detail or features. For example, when
the camera is pointed at a completely blank wall the stabilized image will jump around
slightly because it is locking on to the random video noise. Similar hunting problems
can occur in other situations where a large part of the scene lacks suitable detail for
Stabilizer lock:
o Other low contrast situations such as at night scenes.
o Scenes with an absence of detail in one direction such as venetian
blinds.
o Scenes with a repeated pattern such as a brick wall.
Enabling the Low Detail mode can result in the stabilization being disabled
prematurely on low contrast or noisy video, which is why this mode is not enabled
by default.
On-Screen Annotation
When this option is enabled, a message will appear on the screen whenever stabilization is
disabled. It is not intended that On-Screen Annotation is permanently enabled. Generally, it
should be used to help set up the Stabilizer in the following configuration situations:
To see the effect of the Auto Disable pan/tilt and Auto Disable Low Detail functions.
To see if the stabilization is being disabled because the camera motion is too fast.
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