How to install opencv-python 4.5.1-dev in Mac?

Python
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1

I was using “pip install opencv-contrib-python” to install the packages which contain both main modules and contrib/extra modules. However, the installed version is 4.5.1. How could I install 4.5.1-dev? Thanks!

2

Hi,
That’s not possible with pip.
If you need a dev version you have to buiild is using cmake

3

you don’t need a “dev” version.

OpenCV has releases. those are good for everything.

“dev version” means git master HEAD, and you don’t need that unless you actually work on OpenCV itself.

4

You can do that by compiling the development version manually. This can be done by following the manual build instructions at opencv-python documentation: GitHub - opencv/opencv-python: Automated CI toolchain to produce precompiled opencv-python, opencv-python-headless, opencv-contrib-python and opencv-contrib-python-headless packages.

Short summary:

Make sure you have build tools installed and you have the latest version of pip.

  1. Clone the repository: git clone --recursive https://github.com/opencv/opencv-python.git
  2. cd opencv-python
  3. cd opencv → git pull → checkout the latest development commit → cd ..
  4. cd opencv_contrib → git pull → checkout the latest development commit → cd ..
  5. export ENABLE_CONTRIB=1
  6. Run pip wheel . --verbose (this will take over 5 minutes, usually 10+)
  7. Wheel package will be generated to dist-directory
  8. Install the custom package from the dist-directory with pip install package_name.whl
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