how to install opencv on BPI-M2 Berry.
The first is to install the various dependencies of opencv and the library of image video.
update at first：
sudo apt-get update
1.install build-essential、cmake、git and pkg-config tool
sudo apt-get install build-essential cmake git pkg-config
2.：Install the various image packages required.
sudo apt-get install libjpeg8-dev （jpeg lib）
sudo apt-get install libtiff5-dev （tif lib）
sudo apt-get install libjasper-dev （JPEG-2000 lib）
sudo apt-get install libpng12-dev （png lib）
3.：The package for video.
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
- install gtk2.0：
sudo apt-get install libgtk2.0-dev
5.Optimize package installation.：
sudo apt-get install libatlas-base-dev gfortran
At this point, various toolkits are installed successfully.
https://github.com/opencv/opencv/releases download opencv sorce code (tar.gz file )，
unzip tar.gz file
1.cd ~ enter opencv dir
2.create build dir
mkdir build
3.cd build enter build dir
4.install to /urs/local
cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local ..
5.Start Compilation：
sudo make
sudo make install
sudo ldconfig
opencv install finished.
write cod to test
create test.cpp
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
using namespace cv;
int main()
{
Mat img=imread("1.jpg");
imshow("test",img);
waitKey(0);
return 0;
}
create CMakeLists.txt and write
cmake_minimum_required(VERSION 2.8)
project( test)
find_package( OpenCV REQUIRED )
add_executable( test test.cpp )
target_link_libraries( test${OpenCV_LIBS} )
Put a picture named 1.jpg in this file directory.
cd
cmake .
make
./test
If the output image is configured correctly.
