JAI VISCAM 1000 System, Руководство по установке

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VISCAM 1000 Systems
34 System Set-Up
camera systems where the cameras are mounted straight above the road). If on the other
hand the cameras are mounted on the side of the road then the vehicle direction and the
camera direction values will be different! It is however important to note that this angle is
always in the same “general direction” as the cameras – no matter if the vehicles are moving
towards the camera or away from the camera! The direction will always need to be specified
as the angle away from the camera.
2. Shadow Boost Factor settings:
The Shadow Boost Factor is the maximum multiplication factor applied to the ALC set-point value when the
back of the vehicle is in “self-shadow” and the license plates are in shadow as well. The Shadow Boost Factor
Angle specifies the range of sun azimuth angles where the Shadow Boost Factor will gradually be increasingly
applied. It starts out with no boost factor when the sun angle is perpendicular to the vehicle direction, then
gradually increases to the maximum boost factor within the Boost Factor Angle degrees.
3. Road Reflection Boost Factor settings:
The Road Reflection Boost Factor is the maximum multiplication factor applied to the ALC set-point value. This
happens when the sun is right in front of the camera and the sunlight bounces off the road surface. The Road
Reflection Boost Factor Angle specifies the range of sun azimuth and elevation angles where the Road
Reflection Boost Factor will gradually be increasingly applied. It starts out with no boost factor when the sun
angle is less than or equal to this angle from the camera direction and elevation - and is then gradually
increased to the maximum boost factor when the sun is straight in front of the camera and the sun elevation is
the same as the camera tilt angle.
It is important to note that the Shadow Boost Factor and the Road Reflection Boost Factor can be applied at
the same time! This means that when the Road Reflection Factor is at its maximum, then the Shadow Boost
Factor will also be at its maximum – hence applying the combined boost factor to the ALC set-point!
4. Direct Sun Reduction Factor settings:
The Direct Sun Reduction factor is the maximum reduction in the ALC set-point value when the sun is right
behind the camera. The Direct Sun Reduction Factor Angle specifies the range of sun azimuth and elevation
angles where the Direct Sun Reduction Factor will be increasingly applied. It starts out with no reduction factor
when the sun angle is less than or equal to this angle from the camera direction and elevation. It is then
gradually increased to the maximum reduction factor when the sun is straight behind the camera and the sun
elevation is the same as the camera tilt angle.
5. Min/Max Shadow Suppression Elevation settings:
The sun position can also be used for automatically enabling the “Shadow Suppression” in the VISCAM-1000
Vehicle Detector. The camera automatically calculates the sun elevation. If this value is within the Min and
Max Shadow Suppression Elevation then Shadow Suppression is turned on when the Vehicle Detector trigger is
enabled.
4.14 Video Streaming and Recording
In addition to capturing triggered “still” images of passing vehicles and plates, the VISCAM 1000 system offers
two types of video capture functions: live streaming and video clip recording. Live streaming outputs a
continuous compressed video stream for real-time remote viewing. Video clip recording captures a short, user
configured sequence of video frames (AVI) covering the period immediately before and after each triggered
image.
Please refer to the Streaming and AVI video application note for more details.