Experimental Design and Application of License Plate Recognition System Based on STM32
With the goal of improving the practical ability of engineering and technical personnel,an experiment of license plate recognition system based on STM32 was designed by combining software and hardware.The STM32 microcontroller was used as the experimental platform,and the hardware system was built with OV7670 camera and TFT display.Based on the C language,the software process was designed.The implementation of license plate recognition includes five steps:Image preprocessing,binarization,recognition of license plate regions,character segmentation,and character recognition.In order to solve the influence of low surface cleanliness of lighting and license plate on the accuracy of license plate recognition,firstly,Gaussian filter is used to preprocess the image,then the upper and lower boundary thresholds are set by using the jump point to determine the license plate recognition area,and finally the upper and lower edge projection method is used to complete the character segmentation task.The practice shows that the experimental design improves the accuracy of license plate recognition and detection,deepens the understanding of embedded technology of engineering and technical personnel,and improves the practical ability and innovation ability of engineering and technical personnel.
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