code: public static void computeNormalizationLL(List<List<Point2D_F64>> points, NormalizationPoint2D normalize )
  	{
  		double meanX = 0;
  		double meanY = 0;
  
  		int count = 0;
  
  		for (int i = 0; i < points.size(); i++) {
  			List<Point2D_F64> l = points.get(i);
  			for (int j = 0; j < l.size(); j++) {
  				Point2D_F64 p = l.get(j);
  				meanX += p.x;
  				meanY += p.y;
  			}
  			count += l.size();
  		}
  
  		meanX /= count;
  		meanY /= count;
  
  		double stdX = 0;
  		double stdY = 0;
  
  		for (int i = 0; i < points.size(); i++) {
  			List<Point2D_F64> l = points.get(i);
  			for (int j = 0; j < l.size(); j++) {
  				Point2D_F64 p = l.get(j);
  				double dx = p.x - meanX;
  				double dy = p.y - meanY;
  				stdX += dx*dx;
  				stdY += dy*dy;
  			}
  		}
  
  		normalize.meanX = meanX;
  		normalize.meanY = meanY;
  
  		normalize.stdX = Math.sqrt(stdX/count);
  		normalize.stdY = Math.sqrt(stdY/count);
  	}
docs: Computes normalization when points are contained in a list of lists
  @param points Input: List of observed points. Not modified.
  @param normalize Output: 3x3 normalization matrix for first set of points. Modified.