ubuntu下opencv在Qt中的使用

1. 编译安装OpenCV2.4.9  本博已有文章描述

2. 安装Qt和QtCreator

从qt-project.org 下载Qt安装文件

qt-opensource-linux-x64-5.4.1.run

从Windows下下载拷贝过来的，*.run没有执行权限，

 chmod a+x qt-opensource-linux-x64-5.4.1.run

双击就安装完了Qt 和 QtCreator

3. 配置Qt

gedit /home/jackielee/Qt5.4.1/5.4/gcc_64/mkspecs/linux-g++-64/qmake.conf

增加两行

QMAKE_INCDIR = /usr/include/opencv

QMAKE_LIBS = -lcvaux -lcv -lcxcore -lhighgui -lml

4. 测试代码

#include <cv.h>
#include <highgui.h>

int main(int argc, char *argv[])
{
    //QCoreApplication a(argc, argv);
    IplImage *img = 0;
    img = cvLoadImage("3.png",-1);
    cvNamedWindow("lena", 1);
    cvShowImage("lena", img);
    cvWaitKey(0);
    return 0;
}

另外需要注意一点的是，需要将opencv的头文件和库文件与Qt关联起来，所以在双击QtCreator工程下到***.pro文件，在其后面添加下列代码：

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

LIBS += /usr/local/lib/libopencv_highgui.so 
        /usr/local/lib/libopencv_core.so    
        /usr/local/lib/libopencv_imgproc.so

即此时对应的整个***.pro文件内容如下：

#-------------------------------------------------
#
# Project created by QtCreator 2012-07-09T22:01:34
#
#-------------------------------------------------

QT       += core

QT       -= gui

TARGET = test1
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app


SOURCES += main.cpp

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

LIBS += /usr/local/lib/libopencv_highgui.so 
        /usr/local/lib/libopencv_core.so    
        /usr/local/lib/libopencv_imgproc.so

5. 构建 运行  运行成功

参考

http://blog.csdn.net/crzy_sparrow/article/details/7315366

http://www.cnblogs.com/tornadomeet/archive/2012/07/10/2584702.html

http://www.cnblogs.com/wuyuegb2312/archive/2012/12/10/2811591.html