Question 253620 in Debian Question posted in
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Debian – Getting opencv registered on Python 3.11 (Jetson Nano)

Have been spending many hours on getting this working with the newest python on Jetson, default it comes with Python 3.6.9 (Jetpack 4.6.4).
So I compiled Python 3.11 and registered it. It works.

NOTE: pip install opencv-python is NOT the solution I am looking for,
since that does not come with CUDA optimalisation.

jtop says: "It is installed"
PROBLEM: Python 3.11 import cv2 says: "No Module named cv2" while these did install according to "make install" results.

- Up-to-date: /usr/lib/python3.11/site-packages/cv2/__init__.py
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/load_config_py2.py
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/load_config_py3.py
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/config.py
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/misc/__init__.py
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/misc/version.py
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/mat_wrapper/__init__.py
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/utils/__init__.py
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/gapi/__init__.py
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/python-3.11/cv2.cpython-311-aarch64-linux-gnu.so
-- Up-to-date: /usr/lib/python3.11/site-packages/cv2/config-3.11.py

ERror we get…

Python 3.11.3 (tags/debian/3.11.3-1+bionic2-dirty:95ae635, Jun  5 2023, 15:54:34) [GCC 7.5.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'cv2'

opencv cmake with the recommended options for Jetson says this (among others)

-   NVIDIA CUDA:                   YES (ver 10.2, CUFFT CUBLAS FAST_MATH)
--     NVIDIA GPU arch:             53
--     NVIDIA PTX archs:
-- 
--   cuDNN:                         YES (ver 8.2.1)
-- 
--   Python 3:
--     Interpreter:                 /usr/bin/python3.11 (ver 3.11.3)
--     Libraries:                   /usr/lib/aarch64-linux-gnu/libpython3.11.so (ver 3.11.3)
--     numpy:                       /usr/local/lib/python3.11/dist-packages/numpy/core/include (ver 1.25.0)
--     install path:                /usr/lib/python3.11/site-packages/cv2/python-3.11
-- 
--   Python (for build):            /usr/bin/python2.7

JTOP Output

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    The solution was that site-packages (some-how) is being ignored by python. When I changed the argument to dist-packages it works. cmake ...... (skip for brevity)

    -D PYTHON3_PACKAGES_PATH=/usr/local/lib/python3.11/dist-packages

    now cv2 loads happily.


  2. 0

    My solution (after 2 hours!!!) was copying file cv2.pyd (from Python folder) to C:ProgramDataAnaconda3Libsite-packages

    Don’t know how it works. Sometimes you should not just follow official instructions but also do analogous things with both Python/pip and Anaconda/conda. I already met this while trying to install Tensorflow.

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