树莓派opencv的安装

树莓派安装opencv的教程层出不穷，但是能用的很少。我这个教程是亲自安装成功的。
我之前安装过好几次opencv2.49都失败了，唯独这个opencv3.1成功了。
下面开始安装吧

1.准备

sudo apt-get install build-essential git cmake pkg-config  
sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
sudo apt-get install python-dev python-numpy libjpeg-dev libjasper-dev libdc1394-22-dev
sudo apt-get install libjpeg8-dev 
sudo apt-get install libtiff5-dev 
sudo apt-get install libjasper-dev
sudo apt-get install libpng12-dev 
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev  
sudo apt-get install libatlas-base-dev gfortran

2.下载opencv

cd /home/pi  
git clone https://github.com/Itseez/opencv.git 
cd opencv 
git checkout 3.0.0

3.安装opencv_contrib：

cd /home/pi  
git clone https://github.com/Itseez/opencv_contrib.git  
cd opencv_contrib  
git checkout 3.0.0

4.安装python

sudo apt-get install python2.7-dev

5.安装opencv

cd进入opencv3.1文件夹

cmake .  # cmake+空格+"."
sudo make
sudo make install
sudo /bin/bash -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
sudo ldconfig

6.编译sample

cd ~/opencv/samples
sudo cmake .
sudo make -j $(nproc)

7.运行测试程序

进入opencv3.1文件夹

cd samples 
cd cpp/
./cpp-example-facedetect lena.jpg