JAI VISCAM 1000 System, Руководство по установке

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6 Installing the VIS
2.3 Side of Road Installation
Figure 4. Typical side fire road installation for a single lane
Table 1 below shows the typical distance from VISCAM 1000 to flash/light unit (distance normal from
camera-license plate axis):
Table 1 Typical spacing distance between VISCAM 1000 and flash/light unit
VISCAM 1000
Approx. Distance
in Feet
3.5
Approx. Distance
in Meters
1.0
If the flash is positioned closer to the camera, reflections from retro-reflective license plates will likely
cause overexposure. If it is positioned farther the license plates will be relatively less bright and the image
quality might be deteriorated since more gain will have to be applied by the camera in order to make the
license plates bright enough for ALPR. A solution to this would be to increase the light intensity of the flash
unit.
If the distance from the camera to the trigger line is further than 50 ft then the spacing between flash and
camera will have to be increased to avoid increasing the retro-reflectivity effect, and the flash light
intensity will have to be increased or else the background will not be visible in the image even when retro-
reflective license plates are close to saturation.