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* Optimal distance calculated to allow license
plates of 120 pixels wide. Most DVR application
can provide readable plates larger than 80 pixels
depending on level of image compression set on
DVR.
The maximum angle of the unit to the car is 40º.
This is both horizontally and vertically. This limits
the amount of skew of the letters on the number
plate. If the letters are skewed too much they will
start to become unrecognizable and will reduce
automatic software recognition rates.
Figure 4 Maximum Vertical Angle
Height
‘H’
Range ‘R’
Max
40ْ
Horizontal Distance ‘D’
REG