ubuntu下Qt调用openCV

1. 编译好openCV，看好装到哪了了

2. pro里面写好链接

   INCLUDEPATH += /usr/include/opencv \
                  /usr/include/opencv2
   
   
   LIBS += /usr/lib/x86_64-linux-gnu/libopencv_highgui.so \
           /usr/lib/x86_64-linux-gnu/libopencv_core.so    \
           /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so \
           /usr/lib/x86_64-linux-gnu/libopencv_imgcodecs.so
   

3. 在main里写这个验证一下是否可用

   #include 
   #include 
   #include 
   using namespace cv;
   
   int main()
   {
       Mat img = imread("/home/gsh/QT_Projects/untitled4/0.jpg");
   
       line(img,Point(1,1),Point(250,250),Scalar(0,0,255),5);//画一条直线
       imshow("可爱的小猫咪", img);
       waitKey(0);
       return 0;
   }
   

这样包含文件也行。。。

#引入opnecv库
INCLUDEPATH += /usr/include/opencv
INCLUDEPATH += /usr/include/opencv2
INCLUDEPATH += /usr/include/opencv2/core
INCLUDEPATH += /usr/include/opencv2/highgui
INCLUDEPATH += /usr/include/opencv2/imgproc
INCLUDEPATH += /usr/include/opencv2/flann
INCLUDEPATH += /usr/include/opencv2/photo
INCLUDEPATH += /usr/include/opencv2/video
INCLUDEPATH += /usr/include/opencv2/features2d
INCLUDEPATH += /usr/include/opencv2/objdetect
INCLUDEPATH += /usr/include/opencv2/calib3d
INCLUDEPATH += /usr/include/opencv2/ml
INCLUDEPATH += /usr/include/opencv2/contrib

#LIBS += /usr/lib/x86_64-linux-gnu/libopencv_highgui.so \
#        /usr/lib/x86_64-linux-gnu/libopencv_core.so    \
#        /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so \
#        /usr/lib/x86_64-linux-gnu/libopencv_imgcodecs.so

#        因为总是少包含头文件，所以发现这个方法也行。。。直接把环境变量下opencv的所有都包含进来
LIBS += `pkg-config opencv --cflags --libs`

#include "cv.h"
#include "highgui.h"