Ubuntu 20.04 配置 Realsense2 + PCL + libfacedetection

Installation Guide

1. Configurate software source (Improve download speed)

See https://blog.youkuaiyun.com/luodong1501/article/details/106177355

2. Install OpenCV

Reference: https://blog.youkuaiyun.com/qq_34256375/article/details/107836051

1. Install dependencies

sudo apt-get install git build-essential
sudo apt-get install cmake libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

2. Clone repo

git clone https://github.com/opencv/opencv.git
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