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

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.

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I use the sdcard image(R32 4.3.*) using balencher.
What version of opencv is provided by default in the image?

I am trying to make a simple custom vision library using opencv.
Can I use opencv provided by default?

Thank you.