installOpenCV-4-raspberry-pi.sh

#!/bin/bash

############## WELCOME #############
# Get command line argument for verbose
echo "Welcome to OpenCV Installation Script for Raspbian Stretch"
echo "This script is provided by LearnOpenCV.com"
echo "Maintained by Vishwesh Ravi Shrimali (vishweshshrimali5@gmail.com)"

echo "Preparing system for installation..."
sudo apt-get -y purge wolfram-engine
sudo apt-get -y purge libreoffice*
sudo apt-get -y clean
sudo apt-get -y autoremove

######### VERBOSE ON ##########

# Step 0: Take inputs
echo "OpenCV installation by learnOpenCV.com"

cvVersion="master"

# Clean build directories
rm -rf opencv/build
rm -rf opencv_contrib/build

# Create directory for installation
mkdir installation
mkdir installation/OpenCV-"$cvVersion"

# Save current working directory
cwd=$(pwd)

# Step 1: Update packages
echo "Updating packages"

sudo apt-get -y update
sudo apt-get -y upgrade
echo "================================"

echo "Complete"

# Step 2: Install OS libraries
echo "Installing OS libraries"

sudo apt-get -y remove x264 libx264-dev

## Install dependencies
sudo apt-get -y install build-essential checkinstall cmake pkg-config yasm
sudo apt-get -y install git gfortran
sudo apt-get -y install libjpeg8-dev libjasper-dev libpng12-dev

sudo apt-get -y install libtiff5-dev

sudo apt-get -y install libtiff-dev

sudo apt-get -y install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev
sudo apt-get -y install libxine2-dev libv4l-dev
cd /usr/include/linux
sudo ln -s -f ../libv4l1-videodev.h videodev.h
cd $cwd

sudo apt-get -y install libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev
sudo apt-get -y install libgtk2.0-dev libtbb-dev qt5-default
sudo apt-get -y install libatlas-base-dev
sudo apt-get -y install libmp3lame-dev libtheora-dev
sudo apt-get -y install libvorbis-dev libxvidcore-dev libx264-dev
sudo apt-get -y install libopencore-amrnb-dev libopencore-amrwb-dev
sudo apt-get -y install libavresample-dev
sudo apt-get -y install x264 v4l-utils

# Optional dependencies
sudo apt-get -y install libprotobuf-dev protobuf-compiler
sudo apt-get -y install libgoogle-glog-dev libgflags-dev
sudo apt-get -y install libgphoto2-dev libeigen3-dev libhdf5-dev doxygen
echo "================================"

echo "Complete"


# Step 3: Install Python libraries
echo "Install Python libraries"

sudo apt-get -y install python3-dev python3-pip python3-venv
sudo -H pip3 install -U pip numpy
sudo apt-get -y install python3-testresources

# Install virtual environment
python3 -m venv OpenCV-"$cvVersion"-py3
echo "# Virtual Environment Wrapper" >> ~/.bashrc
echo "alias workoncv-$cvVersion=\"source $cwd/OpenCV-$cvVersion-py3/bin/activate\"" >> ~/.bashrc
source "$cwd"/OpenCV-"$cvVersion"-py3/bin/activate
echo "================================"

echo "Complete"

echo "Creating Python environments"

############ For Python 3 ############
# create virtual environment
mkvirtualenv OpenCV-"$cvVersion"-py3 -p python3
workon OpenCV-"$cvVersion"-py3

# now install python libraries within this virtual environment
sudo sed -i 's/CONF_SWAPSIZE=100/CONF_SWAPSIZE=1024/g' /etc/dphys-swapfile
sudo /etc/init.d/dphys-swapfile stop
sudo /etc/init.d/dphys-swapfile start
pip install numpy dlib
# quit virtual environment
deactivate
######################################

echo "================================"
echo "Complete"

# Step 4: Download opencv and opencv_contrib
echo "Downloading opencv and opencv_contrib"
git clone https://github.com/opencv/opencv.git
cd opencv
git checkout master

cd ..

git clone https://github.com/opencv/opencv_contrib.git
cd opencv_contrib
git checkout master

cd ..
echo "================================"
echo "Complete"

# Step 5: Compile and install OpenCV with contrib modules
echo "================================"
echo "Compiling and installing OpenCV with contrib modules"
cd opencv
mkdir build
cd build

cmake -D CMAKE_BUILD_TYPE=RELEASE \
            -D CMAKE_INSTALL_PREFIX=$cwd/installation/OpenCV-"$cvVersion" \
            -D INSTALL_C_EXAMPLES=ON \
            -D INSTALL_PYTHON_EXAMPLES=ON \
            -D WITH_TBB=ON \
            -D ENABLE_NEON=ON \
            -D ENABLE_VFPV3=ON \
            -D WITH_V4L=ON \
            -D OPENCV_PYTHON3_INSTALL_PATH=$cwd/OpenCV-$cvVersion-py3/lib/python3.5/site-packages \
        -D WITH_QT=ON \
        -D WITH_OPENGL=ON \
        -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \
        -D BUILD_EXAMPLES=ON ..

make -j$(nproc)
make install

cd $cwd

sudo sed -i 's/CONF_SWAPSIZE=1024/CONF_SWAPSIZE=100/g' /etc/dphys-swapfile
sudo /etc/init.d/dphys-swapfile stop
sudo /etc/init.d/dphys-swapfile start
echo "sudo modprobe bcm2835-v4l2" >> ~/.profile