Ubuntu 18.04下安装OpenCV3

参考资料（对比着看）：

一、为python从源代码编译安装OpenCV

https://blog.youkuaiyun.com/THMAIL/article/details/56006096

二、Ubuntu 18.04 Python3.6.5 安装opencv2-python

https://blog.youkuaiyun.com/blgpb/article/details/80780868

三、Ubuntu 18.04下的Python和OpenCV的安装

https://blog.youkuaiyun.com/GreenHandCGL/article/details/81452362

四、源码编译opencv卡在IPPICV: Download: ippicv_2017u3_lnx_intel64_general_20170822.tgz解决办法

https://blog.youkuaiyun.com/u010739369/article/details/79966263

五、Ubuntu16.04 安装opencv3.3.1

https://blog.youkuaiyun.com/pkokocl/article/details/78777651

六、在已配置成功的opencv3.2.0下配置opencv_contrib模块

https://www.cnblogs.com/ilym/p/8024788.html