problem of using class cv :: Mat in the environment C + + CLR

edit

You are using a relative path for test.jpg. Are you sure that the image is located where it is supposed to when you run your executable?

You are probably executing your program from a working directory different than what you are expecting.

Just to be sure, you could try to provide imread the absolute path to the image test.jpg

Good luck!

The code i used and it worked for me

include opencv2/highgui/highgui.hpp

include opencv2/core/core.hpp

include iostream

(include the above files and the rest of the code goes down here)

using namespace std;

using namespace cv;

int main()
{


cv::Mat img = imread("left.jpg");

if (img.empty())

{

    cout <<"error" <<endl;

}

else

{

    cout <<"image read" <<endl;

}

return 0;

}

Hope this helps you :)