在ubuntu18.04下安装opencv3.4.5

博主①：https://blog.csdn.net/weixin_44354586/article/details/89388500
博主②https://blog.csdn.net/Ding_0110M/article/details/88083741

opecv下载地址：https://opencv.org/releases/page/3/

Ubuntu18.04下查看Opencv安装的版本号：https://jingyan.baidu.com/article/03b2f78ca1c37a1ea337ae3a.html