ubuntu16.04通过命令安装

sudo apt-get install libopencv-dev

ubuntu16.04默认安装的是opencv2.4.9.1

关于Qt环境下的配置是：

INCLUDEPATH += /usr/include \
               /usr/include/opencv \
               /usr/include/opencv2

LIBS += /usr/lib/x86_64-linux-gnu/libopencv_calib3d.so \
        /usr/lib/x86_64-linux-gnu/libopencv_contrib.so \
        /usr/lib/x86_64-linux-gnu/libopencv_core.so \
        /usr/lib/x86_64-linux-gnu/libopencv_features2d.so \
        /usr/lib/x86_64-linux-gnu/libopencv_flann.so \
        /usr/lib/x86_64-linux-gnu/libopencv_gpu.so \
        /usr/lib/x86_64-linux-gnu/libopencv_highgui.so \
        /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so \
        /usr/lib/x86_64-linux-gnu/libopencv_legacy.so \
        /usr/lib/x86_64-linux-gnu/libopencv_ml.so \
        /usr/lib/x86_64-linux-gnu/libopencv_nonfree.so \
        /usr/lib/x86_64-linux-gnu/libopencv_objdetect.so \
        /usr/lib/x86_64-linux-gnu/libopencv_ocl.so \
        /usr/lib/x86_64-linux-gnu/libopencv_photo.so \
        /usr/lib/x86_64-linux-gnu/libopencv_stitching.so \
        /usr/lib/x86_64-linux-gnu/libopencv_superres.so \
        /usr/lib/x86_64-linux-gnu/libopencv_ts.a \
        /usr/lib/x86_64-linux-gnu/libopencv_video.so \
        /usr/lib/x86_64-linux-gnu/libopencv_videostab.so

但是我们不能每次新建一个项目都要拷贝一下：

进入我的qt安装目录，找到mkspecs文件夹：

/home/apple/Qt5.12.0/5.12.0/gcc_64/mkspecs