I assume you have downloaded Raspberry Pi OS and installed it on your RPi. I also assume your RPi is running and functioning perfectly.
Make sure you have extended your disk before performing any step from below.
If you have problems related to low RAM you can follow these points, otherwise you can go to step 1.
$ sudo dphys-swapfile swapoff
As root, edit the file /etc/dphys-swapfile and modify the variable CONF_SWAPSIZE (The size here is in MB):
$ CONF_SWAPSIZE = 2048
To modify the swap file, edit the variable CONF_SWAPFILE, and run dphys-swapfile setup which will create and initialize the file.
$ sudo dphys-swapfile swapon
$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo rpi-update (can be skipped, but recommended) (don't do it if you will use the RPI cam as recommended by official RPI Website)
$ sudo reboot now
$ sudo apt-get install build-essential cmake pkg-config
$ sudo apt-get install libjpeg-dev libtiff5-dev libjasper-dev libpng12-dev
$ sudo apt-get install libgtk2.0-dev libgstreamer0.10-0-dbg libgstreamer0.10-0 libgstreamer0.10-dev libv4l-0 libv4l-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 libatlas-base-dev gfortran
$ sudo apt-get install python-numpy python-scipy python-matplotlib
$ sudo apt-get install default-jdk ant
$ sudo apt-get install libgtkglext1-dev
$ sudo apt-get install v4l-utils
install pip
$ wget https://bootstrap.pypa.io/get-pip.py
$ sudo python get-pip.py
$ sudo apt-get install python2.7-dev
$ sudo pip install numpy
Download OpenCV 3.2.0 and unpack it
$ cd ~
$ wget -O opencv.zip https://.com/Itseez/opencv/archive/3.2.0.zip
$ unzip opencv.zip
Contrib Libraries (Non-free Modules)
$ wget -O opencv_contrib.zip https://.com/Itseez/opencv_contrib/archive/3.2.0.zip
$ unzip opencv_contrib.zip
preparing the build
$ cd ~/opencv-3.2.0/
$ mkdir build
$ cd build
$ cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D INSTALL_C_EXAMPLES=OFF \
-D INSTALL_PYTHON_EXAMPLES=ON \
-D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-3.2.0/modules \
-D BUILD_EXAMPLES=ON \
-D ENABLE_NEON=ON ..
takes about 3.5 to 4 hours
$ sudo make -j3 (I prefer -j3, because it doesn't use all the cores so it keeps the RPi cool enough)
# If any errors occurs and the process fails to continue, execute
$ sudo make clean
# Sometimes using multicores can cause problems, so if you face any problems just execute
$ sudo make
# but keep in mind that it will take much longer so be patient as much as you can and grab your cup of tea or coffee :p.
installing the build prepared in step 11
$ sudo make install
$ sudo ldconfig
$ sudo nano /etc/ld.so.conf.d/opencv.conf
opencv.conf will be blank, add the following line, then save and exit nano:
/usr/local/lib # enter this in opencv.conf, NOT at the command line
(leave a blank line at the end of opencv.conf)
save opencv.conf by pressing ctrl+o get back again to the command line by pressing ctrl+x
$ sudo ldconfig
$ sudo nano /etc/bash.bashrc
add the following lines at the bottom of bash.bashrc
PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH
(leave a blank line at the end of bash.bashrc) save bash.bashrc changes (ctrl+o), then back at the command line (ctrl+x),
Reboot
$ sudo shutdown -r now
verifying the installation
Open Python 2 IDLE on RasPi Type the following lines in the python shell:
>>> import cv2
>>> print cv2.__version__
the following line should appear then:
'3.2.0'
TODO
- Connect to RPi without internet connection.