open cv + mfc ，编写凸包法程序遇到 “无效参数传递给了将无效参数视为严重错误的函数” 的问题

VC2017 + open cv + mfc ，编写凸包法程序遇到 “无效参数传递给了将无效参数视为严重错误的函数” 的问题

可能代码这样写就是错的，我是自己把灰度化后的图片进行二值化代入现成的凸包程序里了，麻烦各位指点迷津，感激！

void CMFC03Dlg::OnClickedButton11()
{
    // TODO: 在此添加控件通知处理程序代码
    Mat dst, bin, src2;
    int thre = 100;
    int threMax = 255;
    cv::cvtColor(Src, dst, COLOR_RGB2GRAY);
    threshold(dst, bin, thre, threMax, THRESH_BINARY);

    vector>contourPoints;
    vectorhierarchy;

    //bin.create(dst.rows, Src.cols, CV_8UC1);
    
/////////////////////////////就是在下面代码出现了无效参数错误///////////////////////////////////
    findContours(bin, contourPoints, hierarchy, RETR_TREE, CHAIN_APPROX_SIMPLE, Point(0, 0));

    vector>convexs(contourPoints.size());
    vectorempty(0);

    for (size_t i = 0; i < contourPoints.size(); i++)
    {
        convexHull(contourPoints[i], convexs[i], true, false);
    }

    RNG rng(12345);
    src2 = Mat::zeros(dst.size(), CV_8UC3);
    for (size_t k = 0; k < contourPoints.size(); k++)
    {
        Scalar color = Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255));
        Scalar color2 = Scalar(0, 255, 0);
        drawContours(src2, contourPoints, k, color, 2, LINE_8, hierarchy, 0, Point(0, 0));
        drawContours(src2, convexs, k, color2, 2, LINE_8, empty, 0, Point(0, 0));
    }

    IplImage *frame;
    IplImage Image = IplImage(src2);
    frame = &Image;
    ShowImage(frame, IDC_STATIC1);

}

在16行前加上 imwrite("bwimg.jpg",bin); 看下这幅图是否正常的