System for simultaneously imaging vehicles and their license...

Details System for simultaneously imaging vehicles and their license... System for simultaneously imaging vehicles and their license...

G - Physics

03

B

G03B 15/06 (2006.01) G08G 1/017 (2006.01) H04N 7/18 (2006.01)

Patent

CA 2330410

A vehicle video imaging system comprises a white-light LED array for illuminating retro-reflective painted parts of a vehicle's license plate and a polarizing filter for illuminating any non-retro-reflective license plate paint and the vehicle itself. A video camera with a polarizing filter turned 90° relative to the one in front of the flash receives the illuminated image of the vehicle and its license plate. The retro-reflective paint of a license plate will return polarized light as it is received, so the white-light LED array will provide all the illumination needed by the camera. The polarizing filters will combine to block out most of the light from the flash that was returned still-polarized by the retro-reflective-paint license plate. All other surfaces that do not have retro-reflective paint will bounce-back and scatter the light from both the polarized flash and non- polarized light.

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