nppFilter with negative coefficients using negative coefficients in nppFilter

Hi,

I’ve noticed that nppiFilter_8u_C1R declares pDst to be Npp8u*
Does it mean that if I use negative values in the filter kernel - I cannot get negative output (since pDst is unsigned)?!

If so, what is the alternative for using negative filter coefficients, which may introduce negative output values?

Thanks,
-Sagiv.