Is OpenCV in Jetpack 4.2.1 optimized for Tegra?

Autonomous Machines Jetson & Embedded Systems Jetson Nano
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Hi

I’m using the Jetson Nano with Jetpack 4.2.1, which includes OpenCV 3.1.1. I’m thinking of upgrading to the latest release of OpenCV using the script mentioned here: [url]https://devtalk.nvidia.com/default/topic/1051133/jetson-nano/opencv-build-script/post/5334837/#5334837[/url]. However, I’ve noticed that OpenCV code contains a HAVE_TEGRA_OPTIMIZATION flag and an internet search has led me to the following two links (neither about the Jetson Nano) which suggest there is a Tegra optimised version of OpenCV:
https://grokbase.com/t/gg/android-opencv/123tb0w9s7/how-to-make-the-option-have-tegra-optimization-enable-for-android
Jetson/Installing OpenCV - eLinux.org

My questions are:

  1. Is the version of OpenCV in Jetpack 4.2.1 optimized for Tegra?
  2. If so, is it possible to upgrade to a newer version of OpenCV without losing this optimization?
  3. If I choose not to upgrade, but want to recompile OpenCV in order to build it for CUDA, is it possible to do that without losing the optimization?

Thank you!

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#OpenCV

Test, Test

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Reply after Un-Archived

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  1. Is the version of OpenCV in Jetpack 4.2.1 optimized for Tegra?
    Ans: Nope, this is just a pure Opencv as you build from source w/o CUDA/Gstreamer support.

  2. If so, is it possible to upgrade to a newer version of OpenCV without losing this optimization?
    Ans: If you need optimization, please download the source from opencv and build it with CUDA enabled.

  3. If I choose not to upgrade, but want to recompile OpenCV in order to build it for CUDA, is it possible to do that without losing the optimization?
    Ans: I think previous answer should be sufficient.

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Thanks for your reply WayneWWW - much appreciated!