public void Add(NPPImage_8uC3 src2, int nScaleFactor)
{
status = NPPNativeMethods.NPPi.Add.nppiAdd_8u_C3IRSfs(src2.DevicePointerRoi, src2.Pitch, _devPtrRoi, _pitch, _sizeRoi, nScaleFactor);
Debug.WriteLine(String.Format("{0:G}, {1}: {2}", DateTime.Now, "nppiAdd_8u_C3IRSfs", status));
NPPException.CheckNppStatus(status, this);
}