public void Add(byte[] nConstant, NPPImage_8uC3 dest, int nScaleFactor)
{
status = NPPNativeMethods.NPPi.AddConst.nppiAddC_8u_C3RSfs(_devPtrRoi, _pitch, nConstant, dest.DevicePointerRoi, dest.Pitch, _sizeRoi, nScaleFactor);
Debug.WriteLine(String.Format("{0:G}, {1}: {2}", DateTime.Now, "nppiAddC_8u_C3RSfs", status));
NPPException.CheckNppStatus(status, this);
}