运行OpenCv代码时出现系统错误“由于缺少opencv_core244.dll，因此无法启动程序”

Question

when i run my code this error occurred :

and my code is :

#include "cv.h"
#include "highgui.h"

using namespace cv;

int main(int, char**)
{
    VideoCapture cap(0);
    if(!cap.isOpened()) return -1;

    Mat frame, edges;
    namedWindow("edges",1);
    for(;;)
    {
        cap >> frame;
        cvtColor(frame, edges, CV_BGR2GRAY);
        GaussianBlur(edges, edges, Size(7,7), 1.5, 1.5);
        Canny(edges, edges, 0, 30, 3);
        imshow("edges", edges);
        if(waitKey(30) >= 0) break;
    }
    return 0;
}

i check opencv bin and dll's but this dll exist

Answer 1

将相关的opencvcore_244.dll从openCV安装复制到％systemroot％\\ system32（如果DLL或程序是64位，则复制到％systemroot％\\ sysWOW64）。