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Editorial Team
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Asked: 2026-05-24T03:50:12+00:00

I recently made a project using opencv and c++ in visual 2008 When i

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I recently made a project using opencv and c++ in visual 2008
When i build the project in Debug mode – i don’t face any issues – but when i build it in release mode i get the following errors:

1>test.obj : error LNK2001: unresolved external symbol _cvHaarDetectObjects
1>test.obj : error LNK2001: unresolved external symbol _cvCvtColor
1>test.obj : error LNK2001: unresolved external symbol _cvCreateImage
1>test.obj : error LNK2001: unresolved external symbol _cvDestroyWindow
1>test.obj : error LNK2001: unresolved external symbol _cvWaitKey
1>test.obj : error LNK2001: unresolved external symbol _cvGetSize
1>test.obj : error LNK2001: unresolved external symbol _cvReleaseCapture
1>test.obj : error LNK2001: unresolved external symbol _cvCreateMemStorage
1>test.obj : error LNK2001: unresolved external symbol _cvClone
1>test.obj : error LNK2001: unresolved external symbol _cvNamedWindow
1>test.obj : error LNK2001: unresolved external symbol _cvQueryFrame
1>test.obj : error LNK2001: unresolved external symbol _cvLoad
1>test.obj : error LNK2001: unresolved external symbol _cvRectangle
1>test.obj : error LNK2001: unresolved external symbol _cvCreateCameraCapture
1>test.obj : error LNK2001: unresolved external symbol _cvGetSeqElem
1>test.obj : error LNK2001: unresolved external symbol _cvShowImage
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1 Answer

  1. Editorial Team

    Check Linker->Input->Additional Dependencies settings in the Release configuration ; you have undoubtedly forgotten to include the OpenCV libraries. Just copy-paste them from the Debug configuration, but don’t forget to remove the d suffix.

    E.g. cv210.lib : Release mode and cv210d.lib : Debug mode.

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