I wish to install opencv-python via the command in Ubuntu 15.04 machine
pip3 install opencv-python
But as soon as I run this command I get the following error :
Downloading/unpacking opencv-python
Could not find any downloads that satisfy the requirement opencv-python
Cleaning up...
No distributions at all found for opencv-python
Storing debug log for failure in /home/Nadeem/.pip/pip.log
Any help would be much appreciated. Thanks!!
You can install opencv from source.
Follow this link to do so.
Or you may need to upgrade your pip3 using the following command
pip3 install --upgrade pip
For completeness(and in case the link is broken) I've listed here steps to compile and install OpenCV from source on Ubuntu(Tested on Ubuntu 14.04 LTS with python 3).
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install build-essential cmake git pkg-config # Developer tools required to compile opencv
sudo apt-get install libjpeg8-dev libtiff4-dev libjasper-dev libpng12-dev # Libraries required to read various image format from disk
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev # Libraries required to read various video formats
sudo apt-get install libgtk2.0-dev # Required by opencv for GUI features
sudo apt-get install libatlas-base-dev gfortran # Packages used by opencv to optimize various functions.
pip3 install --upgrade pip
conda create -n opencv-exmaple-env python=3.6
source activate opencv-exmaple-env # Activate the envirnoment
sudo apt-get install python3.6-dev # If the python version is not 3.6 then make changes to this command accordingly.
pip install numpy # This should be done after the environment in Step 3 is activated
cd ~
mkdir opencv-source
cd opencv-source
git clone https://github.com/Itseez/opencv.git
cd opencv
git checkout 3.3.0 # Branch you want to compile from
Contains exptra functionalities such as standard keypoint detectors and local invariant descriptors (such as SIFT, SURF, etc.)
cd ~
mkdir opencv-contrib
cd opencv-contrib
git clone https://github.com/Itseez/opencv_contrib.git
cd opencv_contrib
git checkout 3.3.0 # The version you want to compile
cd ~/opencv-source/opencv
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D INSTALL_C_EXAMPLES=ON \
-D INSTALL_PYTHON_EXAMPLES=ON \
-D OPENCV_EXTRA_MODULES_PATH=~/opencv-contrib/opencv_contrib/modules \
-D BUILD_EXAMPLES=ON ..
make -j4
sudo make install
sudo ldconfig
ln -s /usr/local/lib/python3.6/site-packages/cv2.so /path-to-python-sitepackages-of-the-environment/cv2.so
import cv2
If the above code runs without error then opencv is installed successfully.
At first upgrade pip using sudo.
arsho:~/workspace $ sudo pip3 install --upgrade pip
Successfully installed pip
Now install opencv-python again using sudo command.
arsho:~/workspace $ sudo pip3 install opencv-python
Successfully installed numpy-1.13.1 opencv-python-3.3.0.10
Finally check the opencv-python version and location information using pip.
arsho:~/workspace $ pip3 show opencv-python
---
Name: opencv-python
Version: 3.3.0.10
Location: /usr/local/lib/python3.4/dist-packages
Requires: numpy
I have tested this using Ubuntu 14.04.5 LTS in https://c9.io/.