OpenCV学习笔记（3）：点集的最小外接矩形/圆，RNG类

#include "stdafx.h"
#include"opencv2/opencv.hpp"
#include 
using namespace cv;
using namespace std;
int main(int argc, char** argv[])
{
	Mat img(500, 500, CV_8UC3);
	RNG rng = theRNG();//随机数类

	for (;;)
	{
		int  count = rng.uniform(1, 101);//uniform()返回指定范围的随机数
		vectorpoints;
		for (int i = 0; i < count; i++)
		{
			Point pt;
			pt.x = rng.uniform(img.cols / 4, img.cols * 3 / 4);
			pt.y = rng.uniform(img.rows / 4, img.rows * 3 / 4);
			points.push_back(pt);
		}
		RotatedRect box = minAreaRect(Mat(points));//点集的最小外接旋转矩形
		Point2f tr[4], center;
		float radius=0;
		box.points(tr);
		minEnclosingCircle(Mat(points), center, radius);//点集的最小外接圆
		img = Scalar::all(0);
		for (int i = 0; i < count; i++)
		{
			circle(img, points[i], 3, Scalar(0, 0, 255), CV_FILLED, CV_AA);
		}
		for (int i = 0; i < 4; i++)
		{
			line(img, tr[i], tr[(i + 1) % 4], Scalar(0, 255, 0), 1, CV_AA);
		}
		circle(img, center, cvRound(radius), Scalar(0, 255, 255), 1, CV_AA);
		imshow("j", img);

		char key = (char)waitKey();
		if (key == 27 || key == 'q' || key == 'Q')
			break;

	}
	return 0;
}