Jul 9, 2014, 7:25 PM
News Code: 2720811
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Iran makes license plate recognition camera

Tehran, July 9, IRNA -- A license plate recognition (LPR) camera has been developed by researchers at Tehran's Science & Technology Park.

Thursday edition of the English language newspaper Iran Daily wrote that combining a high-resolution LPR camera, an infrared camera (IR), lighting system and onboard processing in a single device, the gadget communicates over any wireless or wired network.

The camera applied in electronic toll collection, cataloging the movements of traffic or individuals, parking applications and speed limit enforcement.

It is an Embedded Technology system, therefore everything is built in within the camera without additional PCs.

It commonly uses infrared lighting to allow the camera to take the picture at any time of the day.

The following primary algorithms are required by the software for identifying a license plate:

• Plate localization, responsible for finding and isolating the plate on the picture.

• Plate orientation and sizing compensates for the skew of the plate and adjusts the dimensions to the required size.

• Normalization adjusts the brightness and contrast of the image.

• Character segmentation finds the individual characters on the plates.

• Optical character recognition.

• Syntactical/geometrical analysis checks characters and positions against country-specific rules.

The average recognized value over multiple fields/images produces a more reliable or confident result, especially since any single image may contain a reflected light flare, be partially obscured or other temporary effect.