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I use Python 3.4 through Anaconda distribution. They don't seem to have Python 3.4 bindings for OpenCV. I tried to use Cmake from the source, but to no avail. Could anybody please help me to install OpenCV for Python 3.4.x?

user3317287
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3 Answers3

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conda install -c menpo opencv3

Does the trick. However you have to have anaconda installed.

JSalys
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There are many tutorials and questions (on SO) about this.

This seems to answer your question. Edit: Reproduced below:

1)  Download OpenCV from http://opencv.org/downloads.html and extract

2)From the extracted folder, copy the file from the extracted directory:   
opencv/build/python/2.7/(either x86 or x64, depending on your Anaconda 
version)/cv2.pyd to your Anaconda site-packages directory, e.g., 
C:\Anaconda\Lib\site-packages

3)To get ffmpeg within opencv to work, you'll have to add the directory 
that ffmpeg is located in to the path (e.g., opencv/sources/3rdparty
/ffmpeg). Then you'll have to find the dll in that folder (e.g., 
opencv_ffmpeg_64.dll) and copy or rename it to a filename that includes 
the opencv version you are installing, (e.g., opencv_ffmpeg249_64) for 
2.4.9.

{End Reproduction}

EDIT2: OpenCV doesn't support Python 3.x except for OpenCV version 3.0 (still experimental, in beta). Download the 3.0 version from the download site and try that.(Thanks to this question).

A SO question with a possible tip, if the previous doesn't work.

And finally, I will point you to a read the docs tutorial on how to install it.

Good luck!

IronManMark20
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  • I don't understand much from this website. Can you please tell me step-by-step how to install from the source if compatible binaries aren't already available? – user3317287 Feb 06 '15 at 03:27
  • Yes, I did that but I got the following error in Python-3.4:ImportError: DLL load failed: The specified module could not be found. – user3317287 Feb 06 '15 at 04:01
  • The cv2.pyd under Python 2.7 is not compatible with Python 3.4 – user3317287 Feb 06 '15 at 04:02
  • I installed the OpenCV version 3.0 beta, it still gives t he same error: ImportError: DLL load failed: The specified module could not be found. – user3317287 Feb 06 '15 at 05:10
  • Hi, I built OpenCV for Python 3.4 using CMake and MingW. It builds successfully, but I don't know what to do from here. How do I get the OpenCV module in the lib/site-packages folder in Python? import cv2 doesn't work. Any help would be much appreciated. – user3317287 Feb 06 '15 at 19:47
  • This is where things are murky, since this was just released. My suggestion would be to try following the steps that I had pasted above. Start with step 2. Also, make *absolutely* sure that the bitness (x86 vs x64) is the same as your python version. – IronManMark20 Feb 06 '15 at 22:16
  • There is no folder from where I can extract cv2.pyd. I can't imagine there is not straightforward steps to install OpenCV for Python-3.x – user3317287 Feb 06 '15 at 22:42
  • As I mentioned, Python 3.x wasn't supported until recently. I am downloading the newest release now, I'll let you know what I find. – IronManMark20 Feb 06 '15 at 22:54
  • No .download failed after an hour. I'll try again later today. I read [this](http://opencv.org/wp-content/uploads/2013/icvs/ICVS2013%20-%20OpenCV%203.0.pdf) which implies the Python related things are in "modules" try looking for that. If you do find it, try adding the directory the Python scripts are in to your PATH. – IronManMark20 Feb 07 '15 at 15:35
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This is Quite Simple way:

I recommend to use through anaconda.

Create the environment in anaconda(recommended one): conda create -n deeplearning

Then, activate by: activate deeplearning

Now, Install opencv for python3.x of Anaconda3 as:

  • conda install -c https://conda.binstar.org/menpo opencv3

    This will simply install opencv3 and other related libraries as: spicy, numpy, scikit-learn and matplotlib in that environment.

Check whether Opencv installed or not as:

>>> import cv2
>>> cv2.__version__
'3.1.0'
susan097
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