I am trying to use OpenCV on a python web application I created on an Amazon EC2 Micro instance running apache.
I've got everything configured and working, except OpenCV isn't installing. This is the output I got from the Apache Error Log.
[Thu Aug 04 18:31:54 2016] [error] [client 72.219.147.5] import cv2
[Thu Aug 04 18:31:54 2016] [error] [client 72.219.147.5] ImportError: No module named cv2
pip install pyopencv
sudo find / -name "cv2.so"
.so
/usr/local/lib/libopencv_photo.so
/usr/local/lib/libopencv_stitching.so
/usr/local/lib/libopencv_flann.so
/usr/local/lib/libopencv_imgcodecs.so
/usr/local/lib/libopencv_videostab.so
/usr/local/lib/libopencv_ml.so
/usr/local/lib/libopencv_objdetect.so
/usr/local/lib/libopencv_imgproc.so
/usr/local/lib/libopencv_superres.so
/usr/local/lib/libopencv_core.so
/usr/local/lib/libopencv_video.so
/usr/local/lib/libopencv_highgui.so
/usr/local/lib/libopencv_features2d.so
/usr/local/lib/libopencv_shape.so
/usr/local/lib/libopencv_videoio.so
/usr/local/lib/libopencv_calib3d.so
-- Python 2:
-- Interpreter: /usr/bin/python2.7 (ver 2.7.10)
-- Libraries: NO
-- numpy: NO (Python wrappers can not be generated)
-- packages path: lib/python2.7/dist-packages
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.