public void GradientColorToGray(NPPImage_8uC1 dest, NppiNorm eNorm)
{
NppStatus status = NPPNativeMethods.NPPi.GradientColorToGray.nppiGradientColorToGray_8u_C3C1R(DevicePointerRoi, Pitch, dest.DevicePointerRoi, dest.Pitch, SizeRoi, eNorm);
Debug.WriteLine(String.Format("{0:G}, {1}: {2}", DateTime.Now, "nppiGradientColorToGray_8u_C3C1R", status));
NPPException.CheckNppStatus(status, null);
}