Opencv2.3和Qt Creator 2.4.1链接器错误

Question

我正在运行opencv和is。当我执行cvLoadImage时，我已经成功地为opencv.But添加了includes，但出现了一个链接器错误。

这是我的代码：

void MainWindow:on_pushButton_clicked()
{

img = cvLoadImage("C:\\Users\\MLS-PROGRAMER\\Documents\\Visual Studio 2010\\Projects\\Image_processing\\Image_processing \\thres.png");
// cvNamedWindow("Image",CV_WINDOW_AUTOSIZE);
// cvShowImage("Image", img);
// cvWaitKey(40);

}

以下是错误消息：

mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvLoadImage referenced in function "private: void __thiscall MainWindow:n_pushButton_clicked(void)" (?on_pushButton_clicked@MainWindow@@AAEXXZ)

debug\FIDAS.exe:-1: error: LNK1120: 1 unresolved externals

#-------------------------------------------------
#
# Project created by QtCreator 2012-05-29T10:31:40
#
#-------------------------------------------------

QT += core gui

TARGET = FIDAS
TEMPLATE = app


SOURCES += main.cpp\
mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui


INCLUDEPATH += C:\OpenCV2.3\opencv\build\include\opencv2\core \
C:\OpenCV2.3\opencv\build\include\opencv \
C:\OpenCV2.3\opencv\build\include\opencv2\imgproc \
C:\OpenCV2.3\opencv\build\gpu\x64\lib \

CONFIG(release,debug|release)
{
LIBS += C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_calib3d231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_contrib231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_core231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_features2d231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_flann231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_gpu231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_haartraining_engine.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_highgui231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_imgproc231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_legacy231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_ml231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_objdetect231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_ts231.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_video231.lib \
}

CONFIG(debug,debug|release)
{
LIBS += C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_calib3d231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_contrib231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_core231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_features2d231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_flann231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_gpu231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_haartraining_engined.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_highgui231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_imgproc231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_legacy231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_ml231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_objdetect231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_ts231d.lib \
C:\OpenCV2.3\opencv\build\gpu\x64\lib\opencv_video231d.lib \
}

如果对这个问题有任何帮助就太好了。

Answer 1

我在自己的项目中使用这样的配置：

LIBS += D:/OpenCV-2.3.0/build/lib/libopencv_core230.dll.a

我用C++接口代替C接口，也就是用imread代替cvLoadImage。

Answer 2

实际上，您应该指定链接路径(在哪里可以找到库)，然后指定要链接的库列表：

LIBS += -L C:\OpenCV2.3\opencv\build\gpu\x64\lib -lopencv_contrib231 -lopencv_core231 -lopencv_features2d231 ...

Answer 3

Step 8对所有架构都进行了描述。

基本上，您必须使用-L指定库路径，然后使用

-l<libname_without_extension>

对于unix (安装在默认位置)：

unix: LIBS += -lopencv_core
unix: LIBS += -lopencv_highgui

对于windows (您的问题)：

win32: LIBS += -L C:\OpenCV2.3\opencv\build\gpu\x64\lib\ -lopencv_core231