OpenCV3 on Raspbian Jessie

#credit http://www.pyimagesearch.com/2015/10/26/how-to-install-opencv-3-on-raspbian-jessie/
sudo apt-get update;
sudo apt-get upgrade;
sudo rpi-update;

sudo reboot;
sudo apt-get install build-essential git cmake pkg-config;
sudo apt-get install libjpeg-dev libtiff5-dev libjasper-dev libpng12-dev
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
sudo apt-get install libxvidcore-dev libx264-dev
sudo apt-get install libgtk2.0-dev

sudo apt-get install libatlas-base-dev gfortran

sudo apt-get install python2.7-dev python3-dev

wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.0.0.zip
unzip opencv.zip

wget -O opencv_contrib.zip https://github.com/Itseez/opencv_contrib/archive/3.0.0.zip
unzip opencv_contrib.zip

wget https://bootstrap.pypa.io/get-pip.py
sudo python get-pip.py

sudo pip install virtualenv virtualenvwrapper
sudo rm -rf ~/.cache/pip

# virtualenv and virtualenvwrapper
export WORKON_HOME=$HOME/.virtualenvs
source /usr/local/bin/virtualenvwrapper.sh

mkvirtualenv cv -p python3
workon cv

cd ~/opencv-3.0.0/
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-3.0.0/modules \
	-D BUILD_EXAMPLES=ON ..