1. Download the opencv 3.4.0 source code from opencv

wget https://github.com/opencv/opencv/archive/3.4.0.zip

2. Download application srouce code from github

git clone git@github.com:ljy980330/NanoPi_Face_sys.git

3. Compile opencv source code

1. install the cmake first

apt-get install cmake

2. unzip package

unzip opencv-3.4.0.zip
cd opencv-3.4.0
mkdir build && cd build

3. install some depend packages

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

4. compile

cmake ..
make -j4
make install
sh -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
ldconfig

5. install folder description

include dir : /usr/local/include /usr/local/include/opencv /usr/local/include/opencv2
lib dir : /usr/local/lib/

Download & install Qt on Ubuntu

1. wiki
2. install application
3. install commond

chmod +x qt-opensource-linux-x64-5.6.3.run
./ qt-opensource-linux-x64-5.6.3.run

4. install OpenGL depend packages

apt-get install mesa-common-dev
apt-get install libglu1-mesa-dev -y