ubuntu16.04下配置Qt+OpenCV开发环境

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系统：Ubuntu16.04 64位

Qt：Qt5.7.0+Qt Creator4.0.2

OpenCV：opencv-2.4.13

按照上面的地址和版本下载相应Linux 64位的安装包后，就可以开始了。

装系统就不说了。

一、安装qt

1、将下载的qt-opensource-linux-x64-5.7.0.run直接运行安装即可。

2、接下来CMake的时候需要qt4，所以还需要执行

$sudo apt-get install qt-sdk

二、编译安装opencv

1、安装cmake及一些依赖库

sudo apt-get install cmakesudo apt-get install build-essential libavcodec-dev libavformat-dev libjpeg.dev libtiff4.dev libswscale-dev libjasper-dev

2、编译安装opencv

解压下载的opencv压缩包，然后在opencv目录下新建Release文件夹

原文：

You need to build the files once again.Locate your OpenCV folder. Create a new folder and name it as release. Enter into this folder. For example

cd /home/user_name/OpenCvmkdir Releasecd Release

Now build using cmake with following command:

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_GTK=ON -D WITH_OPENGL=ON ..

Remember to put WITH_GTK=ON during cmake. After this step enter the command,

makesudo make install

This should resolve your problem.If you have broken dependencies for libgtk2.0-dev, then install a fresh copy of libgtk2.0-dev using aptitude.

sudo aptitude install libgtk2.0-dev

如果没有aptitude，就先安装aptitude，再重新执行

sudo aptitude install libgtk2.0-dev

三、测试

1、打开qt->创建工程->Non-Qi Project->Plain C++ Applicaton->完成

2、在.pro文件中加入如下

INCLUDEPATH += /usr/local/include/opencvLIBS += -lopencv_core \-lopencv_imgproc \-lopencv_highgui \-lopencv_ml \-lopencv_video \-lopencv_features2d \-lopencv_calib3d \-lopencv_objdetect \-lopencv_contrib \-lopencv_legacy \-lopencv_flann

3、测试代码如下

#include <opencv/cv.h>#include <opencv/highgui.h>int main(){    IplImage *img = 0;    img = cvLoadImage("pic.jpg",-1);    //pic.jpg在所建工程的目录下    cvNamedWindow("test", 1);    cvShowImage("test", img);    cvWaitKey(0);    return 0;}

运行。

在ubuntu 下用Qt写opencv的程序运行出现error while loading shared libraries: libopencv_highgui.so.2.4 错误，是opencv的库路径没有设置好。

参考：http://wenku.baidu.com/link?url=3GwCKjVbDJn4o8jpPWG4Uljqplh_rKVF6-a6SIrSR7axoq-cimkx7L8ZZUnfLzyURYTYhh7XxSLSM6UTvXOK7of9P7Bp_Ht2R5mgAhaKpZG

接下来要给系统加入opencv库的环境变量（也就是库存放的路径，注意不是解压路径）
用vim打开/etc/ld.so.conf，注意要用sudo打开获得权限，不然无法修改，如：sudo vim /etc/ld.so.conf，在文件中加上一行 /usr/loacal/lib，/user/loacal是opencv安装路径就是makefile中指定的安装路径
再运行sudo ldconfig,
修改bash.bashrc文件，sudo gedit /etc/bash.bashrc
在文件末尾加入：
PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH

然后source /etc/bash.bashrc

可以正常运行了。

成功！

参考：

http://stackoverflow.com/questions/28776053/opencv-gtk2-x-error

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