Use of CUDA-API with opencv

I am a Master student working on an real time image correction project. For image processing i have used Opencv-c++. For speeding up my performance of algorithm i want to use CUDA-API with opencv. I want some source to get a clear view how to use CUDA-API in opencv program. Sorry, but i could’nt find any examples of opencv with CUDA-API program. Can anybody help me by providing some examples, to use CUDA-API in opencv program.

There are numerous examples of integrating CUDA API processing with OpenCV. Here is one example: