Question

我正在尝试使用两台相机追踪线条。一切正常，直到Canny Edge检测。

在Canny之后，程序显示内存位置错误，与标题中的错误相同：

testcamcalib.exe中0x01221316处的未处理异常：0xC0000005：访问冲突读取位置0x00cf6000。

指针指向：

float rho = lines[i][0], theta = lines[i][1];

这是我的代码：

int main()
{
//initializing camera and allocate memory to load the video stream from camera 
cv::VideoCapture camera0(1);
cv::VideoCapture camera1(0);

if( !camera0.isOpened() ) return 1;
if( !camera1.isOpened() ) return 1;

while(true) {
    //capture and retrieve each frames of the video sequentially, one frame at time will be displayed 
    // capture from 1st camera
    Mat edges0, edges1, dst0, dst1, cdst0, cdst1;
    cv::Mat3b frame0;
    camera0 >> frame0;
    // Performing edge detection on camera 1
    cvtColor(frame0, edges0, CV_BGR2GRAY);
        GaussianBlur(edges0, edges0, Size(7,7), 1.5, 1.5);
    Canny(edges0, dst0, 0, 30, 3);
     vector<Vec2f> lines;
    // detect lines
    HoughLines(dst0, lines, 1, CV_PI/180, 150, 0, 0 );

    // draw lines
    for( size_t i = 0; i < lines.size(); i++ )
    {
        float rho = lines[i][0], theta = lines[i][1];
        Point pt1, pt2;
        double a = cos(theta), b = sin(theta);
        double x0 = a*rho, y0 = b*rho;
        pt1.x = cvRound(x0 + 1000*(-b));
        pt1.y = cvRound(y0 + 1000*(a));
        pt2.x = cvRound(x0 - 1000*(-b));
        pt2.y = cvRound(y0 - 1000*(a));
        line( cdst0, pt1, pt2, Scalar(0,0,255), 3, CV_AA);
    }

    //capturing frames from second camera
    cv::Mat3b frame1;
    camera1 >> frame1;
    // performing edge detection on camera 2
    cvtColor(frame1, edges1, CV_BGR2GRAY);
    GaussianBlur(edges1, edges1, Size(7,7), 1.5, 1.5);
    Canny(edges1, dst1, 0, 30, 3);
    // detect lines
    HoughLines(dst1, lines, 1, CV_PI/180, 150, 0, 0 );

    // draw lines
    for( size_t i = 0; i < lines.size(); i++ )
    {
        float rho = lines[i][0], theta = lines[i][1];
        Point pt1, pt2;
        double a = cos(theta), b = sin(theta);
        double x0 = a*rho, y0 = b*rho;
        pt1.x = cvRound(x0 + 1000*(-b));
        pt1.y = cvRound(y0 + 1000*(a));
        pt2.x = cvRound(x0 - 1000*(-b));
        pt2.y = cvRound(y0 - 1000*(a));
        line( cdst1, pt1, pt2, Scalar(0,0,255), 3, CV_AA);
    }


    cv::imshow("edges0", cdst0);
    cv::imshow("edges1", cdst1);

    //wait for 40 milliseconds
    int c = cvWaitKey(30);

    //exit the loop if user press "Esif(27 == char(c)) breakc" key  (ASCII value of "Esc" is 27) 
    ;
}

return 0;
}

Answer 1

您可以尝试调试代码。也许lines的第二个维度存在问题。 lines[i][0]或lines[i][1]可能无效。您可以将这两个语句放在不同的行中并对其进行调试以了解有关该问题的更多信息。

testcamcalib.exe中0x01221316处的未处理异常：0xC0000005：访问冲突读取位置0x00cf6000

1 个答案: