A License Plate Recognition and Speed Detection System - Index of
A License Plate Recognition and Speed Detection System - Index of
A License Plate Recognition and Speed Detection System - Index of
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Appendix C: Camera Setup Calculations<br />
Given: Camera horizontal field <strong>of</strong> view = 6 degrees<br />
Given: <strong>License</strong> plate character width = 1.125”<br />
Given: Camera horizontal resolution / 2 = (640 / 2) = 320 pixels<br />
Given: Minimum number <strong>of</strong> pixels a license plate character can span <strong>and</strong> still be recognized = 14<br />
Y / 320 Pixels = 1.125” / 14 Pixels<br />
Y = 25.71”<br />
Camera to vehicle distance = 25.71” / tan(6 Degrees/2) = 490.58” = 40.88’<br />
Camera Field <strong>of</strong> View Distance = 2 x Y = 2 x 25.71” = 50.42”<br />
Camera<br />
HFOV<br />
39.51’<br />
Maximum Vehicle Travel Distance / 39.51’ = 2.14’ / 12.64’<br />
Maximum Vehicle Travel Distance = 6.69’ (When vehicle is in center <strong>of</strong> lane)<br />
Y<br />
Camera to vehicle<br />
distance = 40.88<br />
Feet 3 Degrees<br />
Video<br />
Camera<br />
Maximum Vehicle<br />
Travel Distance<br />
96<br />
2.14’<br />
12.64’
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