Why cv2.so missing after opencv installed?

Question

Today I installed opencv 2.4.4 to Ubuntu 12.10

But import cv2 not works.

root@-:~# python Python 2.7.3 (default, Sep 26 2012, 21:53:58)  [GCC 4.7.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import cv2 Traceback (most recent call last):   File "<stdin>", line 1, in <module> ImportError: No module named cv2 >>>  

As I understand cv2.so missed, so python don't see where opencv

root@-:~# find / -name "cv.py" /root/opencv-2.4.4/modules/python/src2/cv.py root@-:~# find / -name "cv2.so" root@-:~# 

My setup steps look like

wget http://downloads.sourceforge.net/project/opencvlibrary/opencv-unix/2.4.4/OpenCV-2.4.4a.tar.bz2 tar -xjf OpenCV-2.4.4a.tar.bz2 cd opencv-2.4.4 mkdir release cd release  cmake -D CMAKE_BUILD_TYPE=RELEASE   -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_PYTHON_SUPPORT=ON .. make && make install echo "/usr/local/lib" >> /etc/ld.so.conf.d/opencv.conf ldconfig   echo "PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig" >> /etc/bash.bashrc echo "export PKG_CONFIG_PATH" >> /etc/bash.bashrc 

Where is cv2.so ? And why it was missed ?

Answer 1

How to install opencv(cv2) with python bindings in Linux - Ubuntu/Fedora

1. Install gcc, g++/gcc-c++, cmake (apt-get or yum, in case of yum use gcc-c++)

   apt-get install gcc, g++, cmake 

2. Downlaod latest opencv from openCV's website

3. Untar it with

   tar -xvf opencv-* 

4. Inside the untarred folder make a new folder called release

   mkdir release cd release 

   (or any folder name) and run this command in it

   cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_NEW_PYTHON_SUPPORT=ON -D BUILD_EXAMPLES=ON .. 

   the .. will pull files from the parents folder and will get the system ready for installation on your platform.

5. in the release folder run

   make 

6. After about 2-3 mins of make processing when its finished run

   sudo make install 

7. Export python path

   export PYTHONPATH=$PYTHONPATH:/usr/local/lib/python2.7/site-packages 

That's it, now go to python and try

>>> import cv2 

you should not get any error message.

Tested on python 2.7, should be virtually similar to python 3.x.

Answer 2

I install python-opencv to solve my problem in Ubuntu 14.04 sh sudo apt-get install python-opencv