How to Install Opencv on Amazon Linux

How to install OpenCV on Amazon Linux?

It seems that default yum repo for Amazon AMI doesn't contain OpenCV packages.

You can compile it from sources by yourself with the following simple steps:

• install necessary packages:

sudo yum install git cmake gcc-c++

• clone OpenCV from repository:

git clone https://github.com/Itseez/opencv.git

• (optionally) choose required version:

git checkout <required version>

• compile and install - create folder in which you want to build it, enter there and type:

cmake <path to sources>
make
sudo make install

It's basic steps - after this you will have OpenCV with some default modules. You can read cmake output and adjust your installation before actual build. Possibly you should install additional packages for your needs (like libpng, libjpg, python etc.).

Installing OpenCV/python on Amazon Linux (apache)?

tested and working on amzn-ami-hvm-2016.03.1.x86_64-gp2

sudo yum install git cmake gcc-c++ numpy python-devel 
sudo pip install --upgrade pip
sudo ln -rs /usr/local/bin/pip /usr/bin/
wget https://pypi.python.org/packages/18/eb/707897ab7c8ad15d0f3c53e971ed8dfb64897ece8d19c64c388f44895572/numpy-1.11.1-cp27-cp27mu-manylinux1_x86_64.whl
sudo pip install numpy-1.11.1-cp27-cp27mu-manylinux1_x86_64.whl 
git clone https://github.com/Itseez/opencv.git
cd opencv
git checkout 3.1.0
mkdir build
cd build
cmake .. -DBUILD_opencv_python2=ON
make -j4
sudo make install
echo 'export PYTHONPATH=$PYTHONPATH:/usr/local/lib/python2.7/site-packages/:/usr/local/lib/python2.7/dist-packages/'>>~/.bashrc;. ~/.bashrc
python -c 'import cv2; print "cv2 imported"'

most importantly after cmake step. you should see this in the output.

--   Python 2:
--     Interpreter:                 /usr/bin/python2.7 (ver 2.7.10)
--     Libraries:                   /usr/lib64/libpython2.7.so (ver 2.7.10)
--     numpy:                       /usr/local/lib64/python2.7/site-packages/numpy/core/include (ver 1.11.1)
--     packages path:               lib/python2.7/dist-packages

now if it is not showing up, you need to completely remove build folder and rerun cmake again after correctly installing numpy, just rerunning cmake inside your already existing build folder will not work.

Install opencv AWS instance

Got it.

first follow the solution from here

and then run

    sudo apt-get update

Clean!

How to install third-party libraries (say opencv) with yum?

Check if epel repo is disabled by running:

sudo yum repolist all

If you see epel is disabled, then enable it and search:

sudo yum --enablerepo=epel search opencv

If you find it, then install it. If you don't find it, you may to download the source, build and install it. Should be straightforward.

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