7.6提取区域的轮廓，计算区域的形状描述算子

来源：互联网发布：java sop的理解编辑：程序博客网时间：2024/06/05 15:09

#include"opencv2/highgui/highgui.hpp"#include "opencv2/imgproc/imgproc.hpp"#include "opencv2/core/core.hpp"using namespace cv;void main(){Mat img=imread("C:\\Users\\Administrator\\Desktop\\工作\\testp\\shuiniu.jpg",0);//Mat img1=imread("C:\\Users\\Administrator\\Desktop\\工作\\testp\\group.jpg",0);//Mat img=imread("C:\\Users\\Administrator\\Desktop\\工作\\testp\\121.jpg");/*threshold(img,img,230,255,THRESH_BINARY);imwrite("shuiniu.jpg",img);imshow("1",img);waitKey(0);*/vector<vector<Point>>contours;findContours(img,contours,CV_RETR_EXTERNAL,CV_CHAIN_APPROX_NONE);Mat result(img.size(),CV_8U,Scalar(255));//drawContours(result,contours,-1,0,2);int cmin=50;int cmax=1000;vector<vector<Point>>::iterator itc=contours.begin();while (itc!=contours.end()){if (itc->size()<cmin||itc->size()>cmax){itc=contours.erase(itc);}else++itc;}Rect r0=boundingRect(contours[0]);rectangle(result,r0,0,2);float radius;Point2f center;minEnclosingCircle(contours[1],center,radius);circle(result,center,static_cast<int>(radius),Scalar(0),2);vector<Point>poly;approxPolyDP(contours[2],poly,5,true);polylines(result,poly,true,0,2);vector<Point>hull;convexHull(contours[3],hull);polylines(result,hull,true,0,2);itc=contours.begin();while (itc!=contours.end()){   Moments mom=moments(Mat (*itc++));   circle(result,Point(mom.m10/mom.m00,mom.m01/mom.m00),2,Scalar(0),2);}drawContours(result,contours,-1,0,2);imshow("src",img);imshow("result",result);waitKey(0);}

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