Why Can't I Build My OpenCV 2.3 Project in Visual Studio 2010?

Troubleshooting OpenCV 2.3 Setup for Visual Studio 2010

Issue:
Unable to build OpenCV 2.3 project with error 'LINK : fatal error LNK1104: cannot open file 'c:OpenCV2.3buildx86vc10lib.obj''.

Solution:

1. Download and Extract OpenCV:

   • Download OpenCV-2.3.0-win-superpack.exe and extract it to a folder named OpenCV2.3.
   • Move the OpenCV2.3 folder to C:.

2. Create New Project and Add Code:

   • Create a new Win32 Console Application project in Visual Studio 2010.
   • Add the following code to main.cpp:

   #include <stdio.h>
   #include <cv.h>
   #include <highgui.h>
   
   int main(int argc, char* argv[])
   {
       if (argc < 2)
       {
           printf("Usage: ./opencv_hello <file.png>\n");
           return -1;
       }
   
       IplImage* img = cvLoadImage(argv[1], CV_LOAD_IMAGE_UNCHANGED);
       if (!img)
       {
           return -1;
       }
   
       cvNamedWindow("display", CV_WINDOW_AUTOSIZE);
       cvShowImage("display", img);
   
       cvWaitKey(0);        
   
       return 0;
   }

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3. Configure Include Directories:

   • Edit Additional Include Directories (Project Properties > C/C > General):

     • C:OpenCV2.3buildincludeopencv
     • C:OpenCV2.3buildincludeopencv2
     • C:OpenCV2.3buildinclude

4. Configure Library Directories:

   • Edit Additional Library Directories (Project Properties > Linker > General):

     • C:OpenCV2.3buildx86vc10lib

5. Add Library Dependencies:

   • Edit Additional Dependencies (Project Properties > Linker > Input):

     • opencv_core230.lib
     • opencv_highgui230.lib

6. Add DLL Path to PATH Variable:

   • Modify the PATH environment variable to include:

     • ; C:OpenCV2.3buildx86vc10bin

Note:

• Make sure to select "All Configurations" when configuring the project properties.
• If you encounter any other errors, verify that OpenCV is properly installed and correctly configured in your system.

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