之前配置好的环境给玩坏了，正好整理下opencv和qt的安装方式。
1.首先换成国内源，我用的是清华的源
sudo nano /etc/apt/sources.list
把原来的注释掉换成
deb http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ stretch main non-free contrib deb-src http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ stretch main non-free contrib
ctrl+o 保存 enter确认 ctrl+x退出
然后update一下
sudo apt-get update
2.安装opencv各种依赖项
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 sudo apt-get install libgtk2.0-dev sudo apt-get install libatlas-base-dev gfortran sudo apt-get install libopencv-dev sudp apt-get install libcv-dev
3.在/home/pi目录下创建opencv目录
mkdir opencv cd opencv
4.下载opencv3.4.1源码
wget -O opencv-3.4.1.zip https://github.com/Itseez/opencv/archive/3.4.1.zip wget -O opencv_contrib-3.4.1.zip https://github.com/Itseez/opencv_contrib/archive/3.4.1.zip unzip opencv-3.4.1.zip unzip opencv_contrib-3.4.1.zip
5.在opencv-3.4.1里创建release目录
cd opencv-3.4.1 mkdir release cd release
6.生成makefile
sudo cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local ..
7.编译安装
sudo make sudo make install sudo ldconfig
8.安装qt5及qtcreator
sudo apt-get install qt5-default sudp apt-get install qtcreator
9.配置qt5
compiler里点击Add，添加C++编译器，选择/usr/bin/里的g++，apply，kit里编译器选刚刚配置好的g++
10.qt配置opencv
.pro里添加如下代码
INCLUDEPATH += /usr/local/include \ /usr/local/include/opencv \ /usr/local/include/opencv2 LIBS += -L /usr/local/lib/ -lopencv_highgui -lopencv_core -lopencv_imgproc \ -lopencv_video -lopencv_videoio -lopencv_imgcodecs -lpthread
Mat img; VideoCapture camera(0); if(!camera.isOpen()) { qDebug()<<"open camera error!"; return; } while(1) { camera >> img; imshow("camera",img); if(waitKey(30) == 27) break; }坑爹的opencv啊。。