python install open-cv

AyaAbout 1 min

python install open-cv

when pip install opencv-python throw error like this:

...
...
Working directory:
      C:\Users\XXXXXX\AppData\Local\Temp\pip-install-kzx3vj4c\opencv-python_c2ee9d023a4a45e584477071884f30ac\_skbuild\win-amd64-3.6\cmake-build
  Please see CMake's output for more information.
  ----------------------------------------
  ERROR: Failed building wheel for opencv-python
Failed to build opencv-python
ERROR: Could not build wheels for opencv-python which use PEP 517 and cannot be installed directly

Solution for Lazy

OpenCV Headless 版本是指不包含 GUI (圖形用戶界面) 支援的 OpenCV 版本，主要用於不需要顯示或處理圖像顯示的場景，例如在服務器環境或容器中運行時。這樣可以減少不必要的依賴和資源使用。

pip install opencv-python-headless

Solution for py >= 3.7 (windows)

pip install --upgrade pip setuptools wheel
pip install opencv-python

Solution for py < 3.7

pip install opencv-python==4.5.5.64

Using Docker

if using docker get eroor like this:

>>> import cv2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.6/dist-packages/cv2/__init__.py", line 8, in <module>
    from .cv2 import *
ImportError: libGL.so.1: cannot open shared object file: No such file or directory

run:

RUN apt-get update
RUN apt-get install -y libgl1-mesa-glx

final docoker image like this:

FROM image as base

RUN apt-get install -y libgl1-mesa-glx
RUN apt-get clean

WORKDIR /app

RUN pip install --upgrade pip
RUN pip install opencv-python

EXPOSE 8888

CMD ["bash"]