Question

我正在运行opencv和qt.I我在执行cvLoadImage时成功添加了opencv.But的包含，但是存在链接器错误。

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);

}

这是错误消息：

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

我的项目文件是这样的

#-------------------------------------------------
#
# 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 \
}

对这个问题的任何帮助都会很棒。？

Answer 1

我对我自己的项目使用这样的配置：

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

我使用C ++ API而不是使用C API，即imread而不是cvLoadImage。

Answer 2

您应该实际指定链接路径（在哪里找到库），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为所有体系结构描述了它。

基本上，您必须使用-L指定库路径，然后使用

添加库文件

-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（你的问题）：

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

Opencv2.3和Qt Creator 2.4.1链接器错误

3 个答案: