OpenCV imshow() does not work

Question

I have written an openCV code and my code has following statement:

cv::imshow("Matches", matchesImg);
cv::waitKey(0);

When I run the code either in Debug or Release I am not able to see window which shows me the output.

And this is happening for every project I create.

Not able to figure out the reason, Can someone please guide me on this?

I am coding on Windows 7 and Visual studio 2010, with opencv version of 2.4.6

Answer 1

As I mentioned in the comments, you have to create a window first, using namedWindow with the same window name as in imshow See this tutorial for details.

EDIT

This strongly suggest that you have to create the window beforehand. Some may argue that it didn't work this way for previous versions of OpenCV. Then, let's say this solution apply at least to OpenCV 2.4.6, which is the version of concern here (and it solved the problem).