Python How to pip install opencv2 with specific version 2 4 9

Question

I know that I could pip install opencv-python which installs opencv3  but is there a separate command or name for opencv specific version such as 2 4 9    If not  how can I specify which version to install   Thanks

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python3 6 -m pip install opencv-python   will install cv2 in linux in branch python3 6

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you can try this   pip install opencv  2 4 9

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If you are using windows os  you can download your desired opencv unofficial windows binary from here  and type  something like pip install opencv python-2 4 13 2-cp27-cp27m-win amd64 whl in the directory of binary file

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There s another easy way  you can type in terminal   sudo apt-get install python-opencv   Install OpenCV-Python in Ubuntu  After installing it  you can use opencv version 2 4 in both c   and python   But I recommend you should use opencv 3 2 0 and opencv-contrib  it gives more features  Hope this can help

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Below Python packages are to be downloaded and installed to their default locations   1 1  Python-2 7 x   1 2  Numpy   1 3  Matplotlib  Matplotlib is optional  but recommended since we use it a lot in our tutorials    Install all packages into their default locations  Python will be installed to C  Python27    After installation  open Python IDLE  Enter import numpy and make sure Numpy is working fine   Download latest OpenCV release from sourceforge site and double-click to extract it   Goto opencv build python 2 7 folder   Copy cv2 pyd to C  Python27 lib site-packeges   Open Python IDLE and type following codes in Python terminal                  import cv2       print cv2 version       If the results are printed out without any errors  congratulations     You have installed OpenCV-Python successfully            https   opencv-python-tutroals readthedocs io en latest py tutorials py setup py setup in windows py setup in windows html

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You can also do it using Anaconda    conda install -c https   conda binstar org menpo opencv 2 4 9

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Via pip you can specify the package version to install using the following   pip install opencv-python  2 4 9   However  that package does not seem to be available on pypi   A little trick for checking available versions   pip install opencv-python    Which returns   Could not find a version that satisfies the requirement opencv-python     from versions  3 1 0 0  3 1 0 1  3 1 0 2  3 1  0 3  3 1 0 5  3 2 0 6  3 2 0 7  No matching distribution found for opencv-python

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First  get the correct opencv version extension which you want to install  If you want to install 3 4 9 20 then run pip install opencv-python  3 4 5 20

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If you re a Windows user  opencv can be installed using pip  like this   pip install opencv-python   lt python version gt   ex - pip install opencv-python  3 6   If you re a Linux user   sudo apt-get install python-opencv   At the same time  opencv can be installed using conda like this     conda install -c https   conda binstar org menpo opencv 3 6

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cv2 vs   opencv3   To get a potential misunderstanding out of the way  The python OpenCV module is named and imported via import cv2 in all versions   2 0  including   3 0  If you want to work with cv2  installing OpenCV versions   3 is fine - unless you re looking for specific compatibility with older versions or are a fan of the 2 4 x versions  The switch from 2 4 x to 3 x was in 2015 and in terms of features  speed and transparency  it makes much sense to use the newer versions  You can read here and here about major differences  2 4 x versions are still supported though  current release is 2 4 13 5   Installing a specific version  e g  OpenCV 2 4 9  That said  If you want to install a specific version that neither pip install opencv-python  2 4 X  sudo apt-get install opencv nor conda install opencv 2 4 x provide  as explained by other answers here   you can always install from sources  In the sourceforge repository you can find all major versions for each operating system  Although for unxeperienced users this might be scary  it is well explained in some tutorials  E g  here for 2 4 9 on Ubuntu 14 04  Or here is the official Linux install doc for the latest release 2 4 13 5    In essence  the install process boils down to    install dependencies  refer to docs  e g  here  for required packages get sources from OpenCVs sourceforge  e g  wget http   sourceforge net projects opencvlibrary files opencv-unix 2 4 9 opencv-2 4 9 zip unzip sources and prepare build by creating build directory and running cmake  mkdir build cd build cmake      your build options       build in the created build directory with   make sudo make install

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Easy and simple   Prerequisites   pip install matplotlib pip install numpy  Final step   pip install opencv-python    Specific version   Final step        opencv-python  2 4 9

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The following command line pip install opencv-python  3 4 2 16 works properly  Use one of the versions presented to you  May be  3 1 0 5  3 2 0 6  3 2 0 7  3 2 0 8  3 3 0 9  3 3 0 10  3 3 1 11  or 3 4 0 12  etc   To make sure  you can see my screenshot screenshot

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python -m pip install opencv-python   which will install opencv based on your current python

[python] Python: How to pip install opencv2 with specific version 2.4.9?

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