Install OpenCV on Raspberry Pi

Install openCV on Raspberry Pi

In this blog post I demonstrated how to install OpenCV 3 with Python 2.7 and Python 3 on Raspberry pi 3B.

What is OpenCV?
OpenCV (Open Source Computer Vision Library) is an open source computer vision and machine learning software library. 
https://opencv.org/about.html

Hardware

• Raspberry Pi 3B Board with SD card and accessories.

Software and Library

• Raspbien Stretch OS
• OpenCV 3.3.0

Install OpenCV on Raspberry Pi

Update First.

sudo apt-get update sudo apt-get upgrade sudo rpi-update

Cmake (builder and compiler)

sudo apt-get install build-essential cmake pkg-config git


dependencies  Image และ Video IO

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

HiGUI 
sudo apt-get install libgtk2.0-dev libgtk-3-dev
sudo apt-get install libatlas-base-dev gfortran


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



OpenCV source code

wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.3.0.zip

unzip opencv.zip

wget -O opencv_contrib.zip https://github.com/Itseez/opencv_contrib/archive/3.3.0.zip

unzip opencv_contrib.zip

Build

cd opencv-3.3.0

mkdir build cd build cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local \ -D INSTALL_PYTHON_EXAMPLES=ON \ -D OPENCV_EXTRA_MODULES_PATH=/home/pi/opencv_contrib-3.3.0/modules \ -D BUILD_EXAMPLES=ON \ -D WITH_OPENGL=ON \ -D WITH_V4L=ON ..

Change Some config

sudo /etc/init.d/dphys-swapfile stop
sudo nano /etc/dphys-swapfile 

set CONF_SWAPSIZE 100 (100 MB) to  1024 (1 GB)
then reboot



login again 

sudo /etc/init.d/dphys-swapfile start


MAKE  ( it take 2 hours )
make -j4



sudo make install sudo ldconfig

Test Import OpenCV in python code

python

import cv2

cv2.__version__

Raspberry pi OpenCV Application

Raspberry Pi Car Detection with OpenCV

http://raspberrypi4u.blogspot.com/2018/06/raspberry-pi-car-detection-with-opencv.html

Raspberry Pi Face Detection with OpenCV

http://raspberrypi4u.blogspot.com/2018/06/raspberry-pi-face-detection-opencv.html

Reference

https://raspberrypi-thailand.blogspot.com/2016/07/opencv-310-raspberry-pi.html

https://raspberrypi-thailand.blogspot.com/2018/02/opencv-34-raspbian-stretch-released-27.html

https://www.pyimagesearch.com/2017/09/04/raspbian-stretch-install-opencv-3-python-on-your-raspberry-pi/

My Website

http://softpowergroup.net/

email : info@softpowergroup.net  ,amphancm@gmail.com  Tel .+6681-6452400

Google+  https://plus.google.com/+SoftpowergroupNetThailand/

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