Question

我已按照此处tutorial完全按照

提及

我现在尝试在Visual Studio上运行简单的OpenCV代码但是我不断收到链接器错误。我正在尝试这个OpenCV tutorial in particular

以下是我不断收到的错误：

   1>Linking...
1>LINK : warning LNK4067: ambiguous entry point; selected 'mainCRTStartup'
1>OpenCV_Proj.obj : error LNK2019: unresolved external symbol "int __cdecl cv::waitKey(int)" (?waitKey@cv@@YAHH@Z) referenced in function _main
1>OpenCV_Proj.obj : error LNK2019: unresolved external symbol "void __cdecl cv::imshow(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class cv::_InputArray const &)" (?imshow@cv@@YAXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@ABV_InputArray@1@@Z) referenced in function _main
1>OpenCV_Proj.obj : error LNK2019: unresolved external symbol "public: __thiscall cv::_InputArray::_InputArray(class cv::Mat const &)" (??0_InputArray@cv@@QAE@ABVMat@1@@Z) referenced in function _main
1>OpenCV_Proj.obj : error LNK2019: unresolved external symbol "void __cdecl cv::namedWindow(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,int)" (?namedWindow@cv@@YAXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@H@Z) referenced in function _main
1>OpenCV_Proj.obj : error LNK2019: unresolved external symbol "class cv::Mat __cdecl cv::imread(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,int)" (?imread@cv@@YA?AVMat@1@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@H@Z) referenced in function _main
1>OpenCV_Proj.obj : error LNK2019: unresolved external symbol "void __cdecl cv::fastFree(void *)" (?fastFree@cv@@YAXPAX@Z) referenced in function "public: __thiscall cv::Mat::~Mat(void)" (??1Mat@cv@@QAE@XZ)
1>OpenCV_Proj.obj : error LNK2019: unresolved external symbol "public: void __thiscall cv::Mat::copySize(class cv::Mat const &)" (?copySize@Mat@cv@@QAEXABV12@@Z) referenced in function "public: class cv::Mat & __thiscall cv::Mat::operator=(class cv::Mat const &)" (??4Mat@cv@@QAEAAV01@ABV01@@Z)
1>OpenCV_Proj.obj : error LNK2019: unresolved external symbol "public: void __thiscall cv::Mat::deallocate(void)" (?deallocate@Mat@cv@@QAEXXZ) referenced in function "public: void __thiscall cv::Mat::release(void)" (?release@Mat@cv@@QAEXXZ)
1>C:\Users\Saher\Documents\Visual Studio 2008\Projects\OpenCV_Proj\Debug\OpenCV_Proj.exe : fatal error LNK1120: 8 unresolved externals``

以下代码：

// OpenCV_Proj.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>

using namespace cv;
using namespace std; 

int main( int argc, char** argv )
{ 
    if( argc != 2) 
    {
     cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
     return -1;
    }

    Mat image;
    image = imread(argv[1], CV_LOAD_IMAGE_COLOR);   // Read the file

    if(! image.data )                              // Check for invalid input
    {
        cout <<  "Could not open or find the image" << std::endl ;
        return -1;
    }

    namedWindow( "Display window", CV_WINDOW_AUTOSIZE );// Create a window for display.
    imshow( "Display window", image );                   // Show our image inside it.

    waitKey(0);                                          // Wait for a keystroke in the window
    return 0;
}

int _tmain(int argc, _TCHAR* argv[])
{
    return 0;
}

我一直试图让OpenCV为VS2008工作一段时间，对此问题的任何帮助都会有所提升。

注意：在本教程的自述文件中，我遵循以下内容：

1) Add build\bin and one of build\{x86|x64}\{vc9\vc10\mingw}\bin to your system path (to use DLLs)
   Add build\{x86|x64}\{vc9\vc10\mingw}\lib or
       build\{x86|x64}\{vc9\vc10\mingw}\staticlib as library directories to your linker settings,
   Add build\include and build\include\opencv as include directories to your compiler settings.



Any help with getting this to work is really appreciated.

Answer 1

这些符号是在OpenCV库中定义的，因此您需要配置项目并让链接器知道您正在使用哪些OpenCV库。

至少应添加： opencv_core230.lib 和 opencv_highgui230.lib （适用于OpenCV 2.3.0）

有关如何在VS2010上执行此操作的详细信息，请check this tutorial。

Answer 2

转到properties-＆gt; Linker-＆gt;输入和

添加 cv210.lib; cxcore210.lib; highgui210.lib; cvaux210.lib;

你的问题将得到解决。

有一个快乐的编码......

Answer 3

我遇到了同样的问题。使用dumpbin查看highgui导出的符号后，发现链接器试图链接到末尾有debug_build_guard的符号。

如果您在发布模式下构建了 OPENCV，则无法在调试模式下编译您的应用程序。尝试将其翻转为 RELEASE，它会神奇地工作:)

OpenCV Build on Visual Studio LINK错误

3 个答案: