ubuntu QT+opencv

pro5.pro

QT += core
QT -= gui

CONFIG += c++11

TARGET = pro5
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

INCLUDEPATH += /usr/local/include \
                /usr/local/include/opencv \
                /usr/local/include/opencv4

LIBS += /usr/local/lib/libopencv_highgui.so \
        /usr/local/lib/libopencv_core.so    \
        /usr/local/lib/libopencv_imgproc.so
        /usr/local/lib/libopencv_imgcodecs.so
LIBS += -L/usr/local/lib -lopencv_core -lopencv_imgcodecs -lopencv_highgui

SOURCES += main.cpp

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

main.cpp

#include 
#include 
#include 
#include 
#include 

using namespace cv;

int main()
{
    //QCoreApplication a(argc, argv);
    namedWindow( "src", WINDOW_AUTOSIZE );
        Mat src1 = imread( "11.png" );
        line(src1,Point(1,1),Point(250,250),Scalar(0,0,255),5);//画一条直线
        while(1)
        {
            imshow( "src", src1 );
            char c =  waitKey(30);
            if( 27==c )
                return 0;
        }

   // return a.exec();
}