How do I install opencv using pip

Question

I need to install cv2 for a script that has been written for me  I tried  pip install cv2 and pip install open cv and got the same problem - a warning message from dist py and complains about zlib being not found  No cv2 installed  I also tried pyopenvc and pip install opencv-python   So  I went to the opencv site and downloaded the relevant exe  Ran it - generated a heap of subdirectories and a make file and stuff    What do I do now

User · Answer

There are two options-  pip install cv2    or  pip install opencv-python   Hope it helps

User · Answer

On Ubuntu you can install it for the system Python with sudo apt install python3-opencv

User · Answer

Open terminal Run the following command pip install --trusted-host pypi org --trusted-host files pythonhosted org opencv-python  Hope it will work

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Open anaconda command prompt and type in below command  conda install -c conda-forge opencv  Once the  Solving environment  is done  It will ask to download dependencies  Type  y    It will install all the dependencies and then you are ready to code

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You can install opencv in a simple way    pip install opencv-python If u are having errors  you can do this    pip install opencv-python-headless

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As of OpenCV 2 2 0  the package name for the Python bindings is  quot cv quot  The old bindings named  quot opencv quot  are not maintained any longer  You might have to adjust your code  The official OpenCV installer does not install the Python bindings into your Python directory  There should be a Python2 7 directory inside your OpenCV 2 2 0 installation directory  Copy the whole Lib folder from OpenCV Python2 7  to C  Python27  and make sure your OpenCV bin directory is in the Windows DLL search path  Alternatively use the opencv-python installers at http   www lfd uci edu  gohlke pythonlibs  opencv  Or Simply install sudo pip3 install opencv-python   for python3  sudo pip install opencv-python    for python2

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In pip package management  there are 4 different OpenCV packages all using the same namespace  cv2  Although they are not officially supported by OpenCV org  they are commonly used in developers  community  You could install any of them using the following command   pip install PACKAGE NAME   where PACKAGE NAME can be   opencv-python   only contains main modules  opencv-contrib-python  contains both main and contrib modules  opencv-python-headless  same as opencv-python but without GUI functionality  opencv-contrib-python-headless  same as opencv-contrib-python but without GUI functionality    You should only install one of them depending on your needs  If you accidentally installed multiple of them in the same environment  you can remove them using pip uninstall before installing the correct one again   For more details  you can refer to the project description of OpenCV on Wheels

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Everybody struggles initially while installing opencv  Opencv requires lot of dependencies in back-end  The best way to start with opencv is  install it in virtual environment  I suggest you to first install python anaconda distribution and create virtual environment using it  Then inside virtual environment using conda install command you can easily install opencv  I feel this is the most safe and easy approach to install opencv   The following command work for me  you can try the same   conda install -c menpo opencv3

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As of 10 22 2019  I think the best answer is simply  conda install opencv   It appears opencv is now in the main Anaconda channel   To see which packages  including opencv  are in the main Anaconda channel go to Anaconda Package Lists and follow the link corresponding to your python version and os version

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In case you use aarch64 platform with ARM64 cpu - and or docker  On a development board on ARM64  no python-opencv version were found at all  version  NONE  I ve had to build from source  This allowed to include CUDA support   In my case it was already available on the board but it wasn t found on the development environment   If compiling from source is out of reach  there are Dockers   Of course compiling will take some time  few hours on ARM core   but it is worthy process to know as most open source tools can be built this way in case of issues

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As a reference it might help someone    On Debian system I hard to do the following    apt-get install -y libsm6 libxext6 libxrender-dev pip3 install opencv-python python3 -c  import cv2

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if you are using Pycharm navigate settings   Project name   Project interpreter just search the module by name in this case OpenCV-python  and install it  worked for me

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run the following command by creating a virtual enviroment using python 3 and run  pip3 install opencv-python   to check it has installed correctly run  python3 -c  import cv2

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Install opencv-python  which is an unofficial pre-built OpenCV package for Python  by issuing the following command  pip install opencv-python

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Make a virtual enviroment using python3   virtualenv env name --python  python3    and run the following command  pip3 install opencv-python   to check it has installed correctly run  python3 -c  import cv2

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Simply use this for the so far latest version 4 1 0  pip install opencv-contrib-python  4 1 0 25  For default version use this  pip install opencv-contrib-python

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You could try using below command-  pip install opencv-contrib-python  It will basically download the compatible version  If this command fails  you could upgrade you pip using below command-  python -m pip install    upgrade pip  If you need a pictorial guide  head over to Simple Steps to Install OpenCV in Windows  You can also try installing OpenCV from prebuilt binaries from the official OpenCV site

User · Answer

Installing cv2 or opencv-python using pip is sometimes a problem  I was having the same problem of installing cv2 with pip  The installation wasn t a problem the problem was to import cv2 after installation  I was getting an Import Error so to fix this i import main from pip to install opencv-python  Try to run the following code in your python file then opencv-python will be installed from pip  internal import main as install try      import cv2 except ImportError as e      install   quot install quot    quot opencv-python quot    finally      pass  I hope this will help someone

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I recommend this for Python 3  Please install it this way with pip  pip3 install opencv-python   This will download and install the latest version of OpenCV

[python] How do I install opencv using pip?

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