public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
System.out.println("请输入总人数");
int num = sc.nextInt();
int a=0;
for (int i = 1; i <= num; i++) {
System.ou
检测直线：cvHoughLines，cvHoughLines2检测圆：cvHoughCircles检测矩形：opencv中没有对应的函数，下面有段代码可以检测矩形，是通过先找直线，然后找到直线平行与垂直的四根线。 检测直线代码：/* This is a standalone program. Pass an image name as a first parameter of the p
