compiling opencv with gpu cuda support

Question

I am using OpenCV 2.3.1 with CUDA 4.0.

I have installed the OpenCV 2.3.1 by CMAKE with WITH_CUDA flag on. And then I compiled the OpenCV solution in release and debug mode, but still when I used the getCudaEnabledDevice function of CV::GPU it is returning 0. This means it is not detecting the CUDA enabled device.

It seems that I have done everything right, still what is happening??

Can Anybody suggest where can be the problem now??.

Thanks in advance.

Answer 1

I had the same problem. I fixed it by copying opencv_core243d.dll from E:\\opencv\\build\\gpu\\x64\\vc10\\lib folder to the work directory with the .exe.
Don't know why that should matter but it did.

Using cuda 5.0
VS2010 express
win 7 x64