findcontours opencv中的分段错误 [英] segmentation fault in findcontours opencv

问题描述

我试图检测一个球并画出界限。它显示错误

I am trying to detect a ball and draw boundaries to it. It shows the error

segmentation fault (core dumped)

错误在这里，

vector<vector<Point> > contours;
    vector<Vec4i> hierarchy;

   Mat itt = Mat::zeros( imgThresholded.size(), CV_8UC1 );
itt = imgThresholded*255;

Canny( itt ,itt, 10, 30, 3 );
vector<vector<Point> > contours_poly( contours.size() );
vector<Point2f>center( contours.size() );
vector<float>radius( contours.size() );
vector<Rect> boundRect( contours.size() );
imshow("canny", itt);
//CIRCLE HOUGH
//vector<Vec3f> circles;
findContours( itt, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0) );
for( int i = 0; i < contours.size(); i++ )
     {
         Scalar color = Scalar(255,255,255);

       if( contours[i].size() > points )
       {approxPolyDP( Mat(contours[i]), contours_poly[i], 3, true );
      boundRect[i] = boundingRect( Mat(contours_poly[i]) );
       minEnclosingCircle( (Mat)contours_poly[i], center[i], radius[i] );
       circle( imgOriginal, center[i], (int)radius[i],color, 2, 8, 0 );
     }
     }

我不能理解segfault。

I am not able to understand where there is segfault.

推荐答案

在findContours之后声明其他向量，如下所示。有关进一步参考，您可以在此处 。希望这解决了你的错误。我遇到了同样的错误，并得到了解决方案为这个在我已经提到的链接。

Declare other vectors after findContours as shown below. For further reference you can see here. Hope this resolves you error. I have faced the same error and got the solution for this in the link I have mentioned.

findContours( itt, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0) );
vector<vector<Point> > contours_poly( contours.size() );
vector<Point2f>center( contours.size() );
vector<float>radius( contours.size() );
vector<Rect> boundRect( contours.size() );

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