License Plate Capture Series
SIR36-870VF650LP
17
RULES TO DESIGN LICENSE PLATE CAMERA
1. Location and Trajectory
Please note the following diagram:
In order to obtain the most optimal image, place the camera where it can obtain a clear, straight view of the
license plate. A low angle is recommended to get the clearest license plate images.
YES
YES
Low Angle
NO
NO
High Angle
2. Focusing and Shutter Speed
Focusing is the most important thing. It is recommended that the focusing should be done on the license plate of
a parked vehicle. It will take time to focus. An example of shutter speed is shown below:
Before
After
※
Shutter speed corresponding with car speed
Shutter Speed
Car Speed
Camera to Object Distance
1/60 ~ 1/120
6~12mph / 10~20km
100~130ft / 30~40m
1/150 ~ 1/300
18~37mph / 30~60km
50~65ft / 15~20m
1/310 ~ 1/500
37~50mph / 60~80km
15~30ft / 5~10m
* The table above is only for reference.
Shutter speeds of 1/250 and 1/500 are the recommended settings.
Please use the chart in the installation manual when selecting shutter speed.
3. 1/7 Screen Area
In order to ensure optimal images, make sure the camera is focus to that the license plate will take up at least
1/7 total width of the viewable screen area. If the drive way is too wide, you must add more cameras to cover the
area.
