Opencv2.3 和 Qt Creator 2.4.1 链接器错误

Opencv2.3 and Qt Creator 2.4.1 linker error

本文关键字：链接 错误 Qt Creator Opencv2      更新时间：2023-10-16

我正在运行opencv和qt。我已经成功地为 opencv 添加了包含。但是当我做cvLoadImage时，有一个链接器错误。

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);
}

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)
debugFIDAS.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:OpenCV2.3opencvbuildincludeopencv2core 
C:OpenCV2.3opencvbuildincludeopencv 
C:OpenCV2.3opencvbuildincludeopencv2imgproc 
C:OpenCV2.3opencvbuildgpux64lib 
CONFIG(release,debug|release)
{
LIBS += C:OpenCV2.3opencvbuildgpux64libopencv_calib3d231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_contrib231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_core231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_features2d231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_flann231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_gpu231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_haartraining_engine.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_highgui231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_imgproc231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_legacy231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_ml231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_objdetect231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_ts231.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_video231.lib 
}
CONFIG(debug,debug|release)
{
LIBS += C:OpenCV2.3opencvbuildgpux64libopencv_calib3d231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_contrib231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_core231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_features2d231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_flann231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_gpu231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_haartraining_engined.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_highgui231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_imgproc231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_legacy231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_ml231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_objdetect231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_ts231d.lib 
C:OpenCV2.3opencvbuildgpux64libopencv_video231d.lib 
}

对此问题的任何帮助都会很棒。？

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

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

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:OpenCV2.3opencvbuildgpux64lib -lopencv_contrib231 -lopencv_core231 -lopencv_features2d231 ...

步骤 8 描述了它适用于所有体系结构。

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

对于窗口（您的问题）：

win32: LIBS += -L C:OpenCV2.3opencvbuildgpux64lib -lopencv_core231
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