DOC: Add some TODO (improve memory print estimation)

include/lsgrmController.txx

@@ -209,7 +209,9 @@ void Controller<TSegmenter>::RunSegmentation()
 
 /*
  * Compute the memory occupied by one node
- * TODO: compute the exact value
+ * TODO: compute the exact value, e.g. experimental measures shows that
+ * for one Baatz node (+pixel) memory is about 700-730 bytes...
+ * And our estimation is of 456!
  */
 template<class TSegmenter>
 unsigned int Controller<TSegmenter>::GetNodeMemory()
@@ -234,7 +236,17 @@ unsigned int Controller<TSegmenter>::GetNodeMemory()
   // Get the memory occupied by the graph, normalize it by n*n
   unsigned int memory = segmenter.GetGraphMemory() / (n*n);
 
-  itkDebugMacro(<<"Size of a node is " << memory);
+  itkWarningMacro(<<"Size of a node is " << memory);
+
+  // Get the memory occupied by one pixel of the image
+  unsigned int pixelMemory = sizeof(typename ImageType::PixelType)
+      + sizeof(typename ImageType::InternalPixelType) * m_InputImage->GetNumberOfComponentsPerPixel();
+
+  itkWarningMacro(<<"Size of an image pixel is " << pixelMemory);
+
+  memory += pixelMemory;
+
+  itkWarningMacro(<<"Size of a node+pixel is " << memory);
 
   return memory;
 }