error LNK2019: unresolved external symbol

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error LNK2019: unresolved external symbol

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[bash]2>Linking...
2>Chen-Image_IPP.lib(ChenImage.obj) : error LNK2019: unresolved external symbol _ippiMean_StdDev_32f_C1R@24 referenced in function "int __cdecl ChenImage_imageMeanStdDev(int,int,short const *,float *,float *)" (?ChenImage_imageMeanStdDev@@YAHHHPBFPAM1@Z)
2>Chen-Image_IPP.lib(ChenImage.obj) : error LNK2019: unresolved external symbol _ippiConvert_16s32f_C1R@24 referenced in function "int __cdecl ChenImage_imageMeanStdDev(int,int,short const *,float *,float *)" (?ChenImage_imageMeanStdDev@@YAHHHPBFPAM1@Z)
2>Chen-Image_IPP.lib(ChenImageDCT.obj) : error LNK2001: unresolved external symbol _ippiConvert_16s32f_C1R@24[/bash]

[bash]what is the problem here?[/bash]

[bash]
[/bash]

[bash]thank you[/bash]

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