What cuda stream do OpenCV::Cuda functions use?

[cudawarped]

@darkerlord149

how do I synchronize the stream manually using cudaStreamSynchronize()? What would be the argument to supply for that function?

Or does cv::cuda::stream::waitForCompletion() have the same effect?

Exactly you want to call waitForCompletion() on your stream object to synchronize with the host.

In my last post I meant cudaDeviceSynchronize (not cudaStreamSynchronize) is called internally when the stream argument is omitted.