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The vehicle license plate automatic recognition is an important part in intelligent traffic management, the design through the use of image acquisition card for vehicle license plate image capture and transfer to the computer, using the LabVIEW software, image pre-processing, image denoising and image enhancement functions. Then according to their license plate color features accurate positioning, the use of license plate character segmentation threshold method, and finally by the OCR function to recognize the characters, identification results are stored to the corresponding database, you can make the appropriate regulations, violations of intelligent traffic management, the experiment shows the vehicle license plate recognition rate is up to 99%.