How to Resolve the 'LNK1104: cannot open file 'lib.obj'' Error When Setting Up OpenCV 2.3 with Visual Studio 2010?

Troubleshooting OpenCv-2.3 Setup for Visual Studio 2010

While integrating OpenCv 2.3 with Visual Studio 2010 Express, you may encounter the fatal error "LINK : fatal error LNK1104: cannot open file 'c:OpenCV2.3buildx86vc10lib.obj'." This occurs because there is no lib.obj in the OpenCV folders, often due to skipping the CMake compilation step.

Resolution:

To alleviate this issue, follow these steps:

1. Add Include Directories:

   • Configuration Properties > C/C > General > Additional Include Directories:

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

2. Add Library Directories:

   • Configuration Properties > Linker > General > Additional Library Directories:

     • C:OpenCV2.3buildx86vc9lib

3. Add Libraries:

   • Configuration Properties > Linker > Input:

     • opencv_core230.lib
     • opencv_highgui230.lib

4. Modify PATH Variable:

   • Append the OpenCV DLL location to the PATH environment variable:

     • ;C:OpenCV2.3buildx86vc9bin

5. Build Project:

   • Press F7 to compile.

6. Run Application:

   • Ensure OpenCV's DLLs are accessible by modifying the PATH variable.

7. Execute Code:

   • Run the code sample provided:

     #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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