在create,file/home/m/opencv/modules/core/src/matrix_wrap.cpp,第1461行中,为缺少的输出数组调用了空指针(create()。

我想举个例子 Drawing labeled connected components 在O'Reilly的书中,但是我在运行时收到以下错误消息(我构建了没有问题的源代码):

#include <opencv2/opencv.hpp>
#include <algorithm>
#include <iostream>
using namespace std;
//using namespace cv;

int main(int argc, char* argv[])
{
    cv::Mat img, img_edge, labels, img_color, stats;
// load image or show help if no image was provided
    if( argc != 2|| (img = cv::imread( argv[1], 0)).empty())
    {
        cout << "\nExample 8_3 Drawing Connected componnents\n" << "Call is:\n" <<argv[0] <<" image\n\n";
        return -1;
    }
    cv::threshold(img, img_edge, 128, 255, cv::THRESH_BINARY);
    cv::imshow("Image after threshold", img_edge);
    int i, nccomps = cv::connectedComponentsWithStats (
                         img_edge, labels,
                         stats, cv::noArray()
                     );
    cout << "Total Connected Components Detected: " << nccomps << endl;
    vector<cv::Vec3b> colors(nccomps+1);
    colors[0] = cv::Vec3b(0,0,0); // background pixels remain black.
    for( i = 1; i <= nccomps; i++ )
    {
        colors[i] = cv::Vec3b(rand()%256, rand()%256, rand()%256);
        if( stats.at<int>(i-1, cv::CC_STAT_AREA) < 100 )
            colors[i] = cv::Vec3b(0,0,0); // small regions are painted with black too.
    }
    img_color = cv::Mat::zeros(img.size(), CV_8UC3);
    for( int y = 0; y < img_color.rows; y++ )
        for( int x = 0; x < img_color.cols; x++ )
        {
            int label = labels.at<int>(y, x);
            CV_Assert(0 <= label && label <= nccomps);
            img_color.at<cv::Vec3b>(y, x) = colors[label];
        }
    cv::imshow("Labeled map", img_color);
    cv::waitKey();
    return 0;
}

opencv(3.4.1)错误:为缺少的调用了空指针(create()。 输出数组)在创建中,文件 /home/m/opencv/modules/core/src/matrix_wrap.cpp,第1461行终止 在引发“cv::exception”的实例后调用what(): opencv(3.4.1)/home/m/opencv/modules/core/src/matrix_wrap.cpp:1461: 错误:(-27)为函数中缺少的输出数组调用了create()。 创造

问题是什么?我如何解决?