The Method Research of Vehicle Image Preprocessing and License Plate Location

Aiming at the characteristics of vehicle images, this paper presents a method about vehicle image preprocessing and license plate location. The image preprocessing mainly includes graying the image, detecting the edge on image, median filtering and taking binaryzation on image. The license plate location consists of locating upper and lower boundary, locating left and right boundary for the image after preprocessing and finally the license plate region located. All the above is the foundation for the subsequent license plate recognition. A large number of experiments have proved that this method has the good image preprocessing effect, high accuracy rate, location speed and the good practical value.