Question

我在VisualStudio V10.0.30319.1 RTMRel上使用OpenCV 2.4.9尝试编译此示例代码：

#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
#include <stdio.h>
#include <stdlib.h>

using namespace cv;
using namespace std;

Mat src; Mat src_gray;
int thresh = 100;
  int max_thresh = 255;
  RNG rng(12345);

  /// Function header
  void thresh_callback(int, void* );

  /** @function main */
  int main( int argc, char** argv )
  {
    /// Load source image and convert it to gray
   VideoCapture capture;
    capture.open(0);
capture.set(CV_CAP_PROP_FRAME_WIDTH,1280);
capture.set(CV_CAP_PROP_FRAME_HEIGHT,960);
char qq=0;
while(qq!=32)
{
    qq = waitKey(30);
    capture.read(src);
    if(!src.empty())
    imshow("Space",src);
}
 /// Convert image to gray and blur it
 cvtColor( src, src_gray, CV_BGR2GRAY );
 blur( src_gray, src_gray, Size(3,3) );

 /// Create Window
 char* source_window = "Source";
 namedWindow( source_window, CV_WINDOW_AUTOSIZE );
 imshow( source_window, src );

 createTrackbar( " Canny thresh:", "Source", &thresh, max_thresh, thresh_callback );
 thresh_callback( 0, 0 );

 waitKey(0);
 return(0);
  }

  /** @function thresh_callback */
  void thresh_callback(int, void* )
  {
 Mat canny_output;
 vector<vector<Point> > contours;
 vector<Vec4i> hierarchy;

 /// Detect edges using canny
 Canny( src_gray, canny_output, thresh, thresh*2, 3 );
 /// Find contours
 findContours( canny_output, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0) );

 /// Draw contours
 Mat drawing = Mat::zeros( canny_output.size(), CV_8UC3 );
 for( int i = 0; i< contours.size(); i++ )
    {
      Scalar color = Scalar( rng.uniform(0, 255), rng.uniform(0,255), rng.uniform(0,255) );
      drawContours( drawing, contours, i, color, 2, 8, hierarchy, 0, Point() );
    }

 /// Show in a window
 namedWindow( "Contours", CV_WINDOW_AUTOSIZE );
 imshow( "Contours", drawing );
  }

它是一个示例代码，应该可以正常查找，但是当我尝试在按空格键捕获图像后运行代码时，程序崩溃并说“＃Ash; Ashkan.exe已停止工作＆＃34;没有任何错误！

我知道问题出在FindContours系列上，因为我评论该行程序运行得很好。

在调试模式下，当传递findContours行时，它说：Ashkan.exe中0x76f2320e处的未处理异常：0xC0000005：访问冲突读取位置0xffffffffffffffff。

有没有人知道这个问题的可能原因？！

OpenCV FindContours导致停止工作

0 个答案: