#include <iostream>
#include <vector>

#include "include/opencv2/opencv.hpp"
#include "include/opencv2/core.hpp"

using namespace std;

bool dContoursIsClose(cv::Mat &image)//输入二值化或灰度图像
{
    vector<vector<cv::Point>> vContours;
	vector<cv::Vec4i> hierarchy;
	cv::findContours(image, vContours, hierarchy, cv::RETR_CCOMP, cv::CHAIN_APPROX_NONE);
	int fatherContoursNum = 0;
	for (size_t i = 0; i < hierarchy.size(); i++) {
		if (hierarchy[i][3] == -1) {//父轮廓
			++fatherContoursNum;
			if (hierarchy[i][2] == -1)//若有内嵌轮廓，此轮廓为闭合轮廓，若没有则不是闭合轮廓
			{
				return false;
			}
		}
		else {//当前对象为子轮廓或内嵌轮廓
			if (hierarchy[i][3] > hierarchy.size()) {//若索引越界
				return false;
			}
			if (i == hierarchy[hierarchy[i][3]][2]) {}//判断内嵌轮廓的父轮廓是否存在
			else {
				return false;
			}
		}
	}
	if (fatherContoursNum != (hierarchy.size() / 2)) {//两层结构的轮廓均有父轮廓与嵌套轮廓
		return false;
	}
	return true;
}