基于opencv的车牌识别源码，使用了canny算法进行边缘检测，然后二值化，接着用cvFindContours搜索轮廓，最后从找到的轮廓中根据角点的个数，角的度数和轮廓大小确定，矩形位置。-Opencv-based license plate recognition source code, using the canny edge detection algorithm, and then two values, followed by cvFindContours search profile, finally found from the contour according to the number of corners, degree angle to determine the size and contours, rectangular position.