中文说明：
matlab实现停车位车辆检测，主要是利用hough变换实现车道线检测.本程序先是二值化，滤波处理后，利用hough变化检测车道线，故确定车位位置，在车位内根据颜色灰度检测是否有车。
English Description：
MATLAB realizes the vehicle detection in parking lot, mainly uses Hough transform to realize lane line detection. This program is binary first, after filtering, the lane line is detected by Hough change, so the location of parking space is determined and whether there is a car in the parking space according to the color gray level.