default OpenCV included in JetPack has no header files related to CUDA

hello,
In JetPack file system for Jetson NANO, there are missing some header files related to CUDA like cudaimgproc.hpp. The SD image is downloaded from the Nvidia official web. Am I missing something? do I need to compile opencv from src? thank you

No, nothing is missing. Our default openCV does not have CUDA supported. To use CUDA, please try to download openCV and build from source.