public void Mean(int coi, CudaDeviceVariable<double> mean, NPPImage_8uC1 mask)
{
int bufferSize = MeanMaskedGetBufferHostSize();
CudaDeviceVariable<byte> buffer = new CudaDeviceVariable<byte>(bufferSize);
status = NPPNativeMethods.NPPi.MeanNew.nppiMean_8u_C3CMR(_devPtrRoi, _pitch, mask.DevicePointerRoi, mask.Pitch, _sizeRoi, coi, buffer.DevicePointer, mean.DevicePointer);
Debug.WriteLine(String.Format("{0:G}, {1}: {2}", DateTime.Now, "nppiMean_8u_C3CMR", status));
buffer.Dispose();
NPPException.CheckNppStatus(status, this);
}