Camera angles
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Single-line rule: Mount the camera so that you can draw a horizontal line that crosses both the left and right edge of the license plate in the captured images. See the illustrations below for correct and incorrect angles for recognition.
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Vertical angle: The recommended vertical view angle of a camera used for LPR is between 15°-30°.
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Horizontal angle: The recommended maximum horizontal view angle of a camera used for LPR is between 15°-25°.