General information

The declared recognition quality is guaranteed if the cameras are installed at angles of not more than 20 degrees to the perpendicular to the plate. In case of larger angles (up to 45 degrees) the numbers will be recognized, although the recognition accuracy will decrease.
The following table shows the main parameters required for camera installation.
 

Zone width of a CCTV camera:

1. 3 m – frontal camera location;
2. 3.2--3.7 m - side location with an angle of no more than 10-20.

Zone width of a 1 Mpix digital camera:
6.5 m – frontal location.
Zone width of a 3 Mpix digital camera:
6.5 m – frontal location.

Camera location on the road

By default, the cameras are installed at a height of 6 m above the controlled lane edge. The control zone center is located 20 m from the camera. The camera is tilted at an angle of18 degrees.
We recommend placing the cameras above the edge of the road, and not above the center. In this case, the horizontal inclination will amount to 4 degrees for the control zone width of 3 m.
 

Camera location at the security sites

By default, the cameras controlling the security site entrances and exits are located at a height of 3 m above the lane edge. The control zone center is then located 11 m from the camera.
 

Setup of the lens focal length

After the camera is mounted, the lens focal length should be adjusted to the required viewing distance.

To set up the lens without the Uragan software, do the following:

1. Direct the camera at the road area where the license plate numbers are to be read;
2. Place a license plate in the center of the control zone. The plate should be perpendicular to the camera axis;
3. Zoom the lens to make the license plate occupy approximately 1/5 of the image at the center of the image;
4. Lock the zoom position;
5. Adjust the image sharpness.

Camera setup

To set up the camera, do the following:

1. Set the required shutter speed.

   1/1000 sec is enough in most cases.

2. Set maximum sharpness and dynamic range of the signal, if the camera includes the video signal Level adjustment.
   Do the following:
   2.1 Aim the camera at a very bright object to catch as much light as possible (but not at the sun!). Decrease the Level value until the image disappears – the lens closes and the image becomes black.
   2.2 Gradually increase the Level value until the image appears.
   2.3 Close the lens for 5 sec using any opaque object (eg. the palm of your hand). Open the lens again.
   2.4 Make sure the image reappears. If the image does not appear, increase the Level value and check the image again.
3. Set the image sharpness. The sharpness should be set up under poor lighting conditions (approx. 10 – 100 lux), when the noise level is just below the signal level. To achieve such conditions, the dark lens filter can be used.