c/c++语言开发共享使用c++实现OpenCV绘制圆端矩形

  // 绘制圆端矩形（药丸状，pill）  void drawpill(cv::mat mask, const cv::rotatedrect &rotatedrect, const cv::scalar &color, int thickness, int linetype)  {  	cv::mat canvas = cv::mat::zeros(mask.size(), cv_8uc1);  	// 确定短边，短边绘制圆形  	cv::rotatedrect rect = rotatedrect;  	float r = rect.size.height / 2.0f;  	if (rect.size.width > rect.size.height) {  		rect.size.width -= rect.size.height;  	}  	else {  		rect.size.height -= rect.size.width;  		r = rect.size.width / 2.0f;  	}  	cv::point2f ps[4];  	rect.points(ps);     	// 绘制边缘  	std::vector<std::vector<cv::point>> tmpcontours;  	std::vector<cv::point> contours;  	for (int i = 0; i != 4; ++i) {  		contours.emplace_back(cv::point2i(ps[i]));  	}  	tmpcontours.insert(tmpcontours.end(), contours);  	drawcontours(canvas, tmpcontours, 0, cv::scalar(255),5, linetype);  // 填充mask   	// 计算常长短轴  	float a = rotatedrect.size.width;  	float b = rotatedrect.size.height;   	int point01_x = (int)((ps[0].x + ps[1].x) / 2.0f);  	int point01_y = (int)((ps[0].y + ps[1].y) / 2.0f);  	int point03_x = (int)((ps[0].x + ps[3].x) / 2.0f);  	int point03_y = (int)((ps[0].y + ps[3].y) / 2.0f);  	int point12_x = (int)((ps[1].x + ps[2].x) / 2.0f);  	int point12_y = (int)((ps[1].y + ps[2].y) / 2.0f);  	int point23_x = (int)((ps[2].x + ps[3].x) / 2.0f);  	int point23_y = (int)((ps[2].y + ps[3].y) / 2.0f);   	cv::point c0 = a < b ? cv::point(point12_x, point12_y) : cv::point(point23_x, point23_y);  	cv::point c1 = a < b ? cv::point(point03_x, point03_y) : cv::point(point01_x, point01_y);   	// 长轴两端以填充的方式画圆，直径等于短轴  	cv::circle(canvas, c0, (int)r, cv::scalar(255), 5, linetype);  	cv::circle(canvas, c1, (int)r, cv::scalar(255), 5, linetype);   	// 绘制外围轮廓，如果不这样操作，会得到一个矩形加两个圆形，丑。。。  	std::vector<std::vector<cv::point>> excontours;  	cv::findcontours(canvas,excontours,cv::retr_external, chain_approx_simple);  	drawcontours(mask, excontours, 0, color, thickness,linetype);  // 填充mask  }

  #include <iostream>  #include <opencv2/opencv.hpp>   using namespace std;  using namespace cv;  void drawpill(cv::mat mask, const cv::rotatedrect &rotatedrect, const cv::scalar &color, int thickness, int linetype);   int main()  {  	cv::mat src = imread("test.jpg");  	cv::mat result = src.clone();  	cv::rotatedrect rorect(cv::point(src.cols / 2, src.rows / 2), cv::size(1000, 800), 50);  	drawpill(result, rorect, cv::scalar(0, 255, 255),8,16);  	imshow("original", src);  	imshow("result", result);  	waitkey(0);  	return 0;  }   // 绘制圆端矩形（药丸状，pill）  void drawpill(cv::mat mask, const cv::rotatedrect &rotatedrect, const cv::scalar &color, int thickness, int linetype)  {  	cv::mat canvas = cv::mat::zeros(mask.size(), cv_8uc1);  	// 确定短边，短边绘制圆形  	cv::rotatedrect rect = rotatedrect;  	float r = rect.size.height / 2.0f;  	if (rect.size.width > rect.size.height) {  		rect.size.width -= rect.size.height;  	}  	else {  		rect.size.height -= rect.size.width;  		r = rect.size.width / 2.0f;  	}  	cv::point2f ps[4];  	rect.points(ps);   	// 绘制边缘  	std::vector<std::vector<cv::point>> tmpcontours;  	std::vector<cv::point> contours;  	for (int i = 0; i != 4; ++i) {  		contours.emplace_back(cv::point2i(ps[i]));  	}  	tmpcontours.insert(tmpcontours.end(), contours);  	drawcontours(canvas, tmpcontours, 0, cv::scalar(255),5, linetype);  // 填充mask   	// 计算常长短轴  	float a = rotatedrect.size.width;  	float b = rotatedrect.size.height;   	int point01_x = (int)((ps[0].x + ps[1].x) / 2.0f);  	int point01_y = (int)((ps[0].y + ps[1].y) / 2.0f);  	int point03_x = (int)((ps[0].x + ps[3].x) / 2.0f);  	int point03_y = (int)((ps[0].y + ps[3].y) / 2.0f);  	int point12_x = (int)((ps[1].x + ps[2].x) / 2.0f);  	int point12_y = (int)((ps[1].y + ps[2].y) / 2.0f);  	int point23_x = (int)((ps[2].x + ps[3].x) / 2.0f);  	int point23_y = (int)((ps[2].y + ps[3].y) / 2.0f);  	cv::point c0 = a < b ? cv::point(point12_x, point12_y) : cv::point(point23_x, point23_y);  	cv::point c1 = a < b ? cv::point(point03_x, point03_y) : cv::point(point01_x, point01_y);   	// 长轴两端以填充的方式画圆，直径等于短轴  	cv::circle(canvas, c0, (int)r, cv::scalar(255), 5, linetype);  	cv::circle(canvas, c1, (int)r, cv::scalar(255), 5, linetype);   	// 绘制外围轮廓，如果不这样操作，会得到一个矩形加两个圆形，丑。。。  	std::vector<std::vector<cv::point>> excontours;  	cv::findcontours(canvas,excontours,cv::retr_external, chain_approx_simple);  	drawcontours(mask, excontours, 0, color, thickness,linetype);  // 填充mask  }