So you want to install OpenCV 2.4.6 ?¶

OpenCV is very optional, its installation is not always simple and I found it to be unstable, be warned ! The installation seems easy for Windows. On linux, here is what I found on the Internet:

Remove any other version of OpenCV if you installed it through a package manager.
Unzip the source code of OpenCV 2.4.6 in some folder. open a terminal in this folder.
Make a new directory and go into this directory:
```
mkdir release
cd release
```

Run cmake. Here is the line I used:

cmake -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=OFF -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON ..

Run make. This may take a few minutes (15 minutes on my computer).
```
make
```
Finally, install.
```
sudo make install
```

And voilà !

You can check if it worked by opeing a Python console and typing

import cv2
print cv2.__version__

Advice: do not throw your release folder away. If later you have strange bugs with OpenCV involving .so files, just redo the sudo make install step.