public void Mean(CudaDeviceVariable<double> mean)
{
int bufferSize = MeanGetBufferHostSize();
CudaDeviceVariable<byte> buffer = new CudaDeviceVariable<byte>(bufferSize);
status = NPPNativeMethods.NPPi.MeanNew.nppiMean_8u_C3R(_devPtrRoi, _pitch, _sizeRoi, buffer.DevicePointer, mean.DevicePointer);
Debug.WriteLine(String.Format("{0:G}, {1}: {2}", DateTime.Now, "nppiMean_8u_C3R", status));
buffer.Dispose();
NPPException.CheckNppStatus(status, this);
}