Returns the number of installed CUDA-enabled devices

num = cv.Utils.getCudaEnabledDeviceCount()

Output

• num number of installed CUDA devices.

Use this function before any other CUDA functions calls. If OpenCV is compiled without CUDA support, this function returns 0. If the CUDA driver is not installed, or is incompatible, this function returns -1.

Other CUDA functions will throw if no CUDA support.