As above, trying to install opencv-python.
Normally this would be a simple pip install opencv-python, but it doesn't seem to work. Instead, opencv install to the miniconda directory
/home/pi/miniconda3/lib/python3.5/site-packages
instead of global
/usr/lib/python3.7
Trying to add opencv-python in Thorny through the application fails. In the python program...
import sys
sys.path.append('/home/pi/miniconda3/lib/python3.5/site-packages')
import cv2
results in a
No module named 'cv2.cv2'
I've tried adding it to path also (export PYTHONPATH=/home/pi/miniconda3/lib/python3.5/site-packages:$PYTHONPATH) with no luck.
Because pip is linked to your default Python and I think this default is your miniconda. A better approach is to call the Python version directly with pip. Additionally #Dave W. Smit mentioned that you should better install opencv-python-contrib to use the full OpenCV package (but don´t use both packages!).
$ python-3.7 -m pip install opencv-python-contrib
Or you can use the pip version (if pip is at least version 0.8)
$ pip-3.7 install opencv-python-contrib
Or with pip version 1.5+
$ pip3.7 install opencv-python-contrib
I installed Python 3.6 using a direct link (brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/f2a764ef944b1080be64bd88dca9a1d80130c558/Formula/python.rbbrew install https://raw.githubusercontent.com/Homebrew/homebrew-core/f2a764ef944b1080be64bd88dca9a1d80130c558/Formula/python.rb), since Brew now install by default 3.7 version, if I use brew install python3
Although if I install OpenCv2 from Brew; I get also Python 3.7, and that version get linked as default, moving 3.6 aside. I did try to brew link the previous version, but then when I import cv2, I get an error that the package does not exist.
If I run brew install opencv It tell me that the packages are already installed; so Python 3.6 can't import it, but 3.7 can.
I thought it is a problem with PATH but even that does not seem to have effect.
is there a way to tell brew to not update python when installing new packages? I am OK with 3.7 being installed; but I would like to be able to use OpenCV2 from both; while now I can only import it using 3.7 and not 3.6
brew pin python will prevent it from being upgraded. OpenCV will need to be installed with --build-from-source since the bottle is built and tested against the latest python formula.
I'm installing Opencv on Ubuntu with VMWARE following this website.
I finished installing opencv and at Step #6, I put import cv2 and got this error:
[libprotobuf fatal /home/psh/opencv-master/3rdparty/protobuf/src/google
/protobuf/stubs/common.cc:78] This program was compiled against version
2.6.1 of the protocol Buffer runtime library, which is not compatible
with the installed version(3.1.0)...
How can I fix it?
I don't know exactly What is the reason. But I got the same problem like you. But instead of fix this error. I try new way to install OpenCV.
And I follow steps in this website: http://milq.github.io/install-opencv-ubuntu-debian/
Run these commands
sudo apt-get install libopencv-dev python-opencv
sudo apt-get autoremove libopencv-dev python-opencv
Download this script and Run
source install-opencv.sh
After about 1-hour installation, we can test by:
python
import cv2
cv2.__version__
If you want to install OpenCV in your virtualenv too, follow step #5 at this tutorial (your tutorial)
I am struggling with Jetson TX2 board (aarch64).
I need to install python wrapper for OpenCV.
I can do:
$ sudo apt-get install python-opencv
But I cannot do:
$ sudo pip install opencv-python
Is this because there is no proper wheel file in http://www.lfd.uci.edu/~gohlke/pythonlibs/#opencv?
Is there a way to install opencv-python through pip?
We were getting the same error.For us, it solved by upgrading pip version (also discussed in FAQ of OpenCV GitHub). Earlier we had pip-7.1.0, post upgrading it to "pip-9.0.2", it successfully installed.
pip install --upgrade pip
pip install opencv-python
pip doesn't use http://www.lfd.uci.edu/~gohlke/pythonlibs/, it downloads packages from PyPI.
The problem is that you have an unusual architecture; pip cannot find a package for it and there is no source code package.
Unfortunately I think you're on your own. You have to download source code from https://github.com/skvark/opencv-python, install compiler and necessary libraries and compile OpenCV yourself.
Use this and it will work:
pip install --upgrade pip
pip install opencv-python
Another problem can be that the python version you are using is not yet supported by opencv-python.
E.g. as of right now there is no opencv-python for python 3.8. You would need to downgrade your python to 3.7.5 for now.
It happened with me on Windows, pip was not able to install opencv-python==3.4.0.12.
Later found out that it was due to the Python version, Python 3.7 has some issue with not getting linked to https://github.com/skvark/opencv-python.
Downgraded to Python 3.6 and it worked with:
pip3 install opencv-python
I faced the same issue but the mistake which I was making was pip install python-opencv where I should have used pip install opencv-python. Hope this helps to anyone. It took me few hours to find.
As there is no proper wheel file in http://www.lfd.uci.edu/~gohlke/pythonlibs/#opencv?
Try this:(Worked in Anaconda Prompt or Pycharm)
pip install opencv-contrib-python
pip install opencv-python
A way to do this is to install Anaconda on your computer.
Then you should be able to do:
pip install opencv-python
or
conda install opencv
I had the same error. The first time I used the 32-bit version of python but my computer is 64-bit. I then reinstalled the 64-bit version and succeeded.
Install it by using this command:
pip install opencv-contrib-python
I faced same issue while using Python 3.9.0.
Upgrading python to latest version (currently 3.9.1) and reinstalling opencv-python solved this issue.
I got this error and I solved it by simply waiting.
I had similar problem:
ERROR: Could not find a version that satisfies the requirement opencv-contrib-python (from versions: none)
Command pip update was not resolving my issue.
After lunch-time I tried again and it installed correctly the package.
Maybe the server was down.
I update the version of python, and then the issue was addressed. Please refer to this video: https://www.youtube.com/watch?v=BQnpRbbEZB4
I'm trying to install OpenCV in python 3.3.2 and Ubuntu 12.04. I've followed this tutorial
Install opencv for Python 3.3
but I can't seem to make it work. When I try to 'import cv2' it says there is no module with that name
Any help with this issue? Thanks.
In ubuntu, you can type command:
sudo apt-get install python-opencv
which will provide you compatible version of opencv to your python.
I had the same problem in windows. But then I copied cv.pyd from opencv/build/python/2.7/x86 instead of opencv/build/python/2.7/x64. It works if you do so. I hope it would be helpful.