one question about how to use zhe CUDA in Jetson KT1

Now I get the CUDA and Opencv in the Official website ,I also installing them in my TK1,but I do not kown how to use the CUDA.I want to use of the GPU to speed my programming . I would be grateful ,if anybady can help me .

You might find this of interest:

There are other tutorials, e.g., for use in Python instead of C/C++.