树莓派 linux opencv 4.0-pre 安装

# 依赖项
sudo apt-get install build-essential cmake git pkg-config  
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 libcv-dev 
  
sudo apt-get install libgtk2.0-dev  
sudo apt-get install libatlas-base-dev gfortran  

github上下载最新的opencv-master

cd opencv-master
mkdir release 
cd release 

生成makefile

sudo cmake -D CMAKE_BUILD_TYPE=RELEASE \  
           -D CMAKE_INSTALL_PREFIX=/usr/local ..  

编译安装（防止树莓派3b+卡死，我就用2个线程）

sudo make -j2
sudo make install  
sudo ldconfig  

然后等一段时间（一小时？）

python里import不报错就可以了

import cv2