分析图像，使用pixval函数来获得牌照的背景色的亮度值和坐标；通过统计的算法找出车牌的范围；通过修剪得到最终图像。-Analysis of images, a function to obtain a license to use pixval background color brightness values ​ ​ and coordinates through statistical algorithms to identify the scope of the

采用MATLAB完成人脸检测，可实现在前景和背景差别较大的情况下完成检测，准确率较高，适用范围较广。(Using MATLAB to complete the face detection can realize the detection of the foreground and the background difference is bigger, the accuracy rate is high, and the scope of application is wider.)