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Page 8
VIS CAM 300/400 Installation Manual
Preparing for installation
installed elements. The following charts (Figure 5 and Figure 6) provide a wide range of trade-offs
between camera height and trigger distance to enable the installer to select convenient camera and light
sensor locations relative to existing mounting structures and vehicle trigger locations. Adhering to the
installation options provided in the installation charts, yields camera images that are generally suitable
for automatic license plate readers (ALPR).
To use the charts correctly, please follow the steps below.
1.
First measure the height above the road to convenient camera mounting locations.
2.
Measure the distance along the road from directly beneath each candidate camera position to conve-
nient trigger locations.
3.
Select the appropriate installation chart for either USA or European style license plates. To obtain
charts for license plates from other countries, please contact the JAI ITS division directly at (+1)
408 7470 300 – 102.
4.
Plot the candidate camera-height / trigger-distance pairs on the chart and determine if the selected
location lies within the wedge of recommended values.
5.
If several locations are suitable, choose the one that yields the greatest overall slant range between
camera and trigger location.
The standard VISCAM 300 unit is equipped with a 25 – 75 mm zoom lens. This lens provides the full
range of camera height and trigger distance listed in the installation charts.
Summary of Contents for Vehicle Imaging Subsystem 300
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