注意在寻找轮廓时要选择中寻找外层轮廓
RETR_EXTERNAL
#include "opencv/cv.h"
#include "opencv/highgui.h"
using namespace std;
using namespace cv;
int main()
{
Mat srcimg=imread("./22.jpg");
Mat dst;
cvtColor(srcimg,dst,CV_BGR2GRAY);
threshold(dst,dst,120,255,1);
vector<vector<Point> > edgepoint;
vector<Vec4i> lclass;
findContours(dst,edgepoint,lclass,RETR_EXTERNAL,CHAIN_APPROX_NONE,Point());
Mat mat[edgepoint.size()];
for(int i=0;i<edgepoint.size();i++)
{
Rect rec=boundingRect(Mat(edgepoint[i]));
mat[i]=dst(rec);
rectangle(dst,rec,Scalar(100,80,90),1,1,0);
drawContours(dst,edgepoint,i,Scalar(200),1,8,lclass);
string str=to_string(i);
imshow(str,mat[i]);
}
imshow("tt",dst);
cout<<edgepoint.size()<<endl;
waitKey(0);
}
结果如下：
总结
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