code: protected final float calculateModuleSize(ResultPoint topLeft,
                                              ResultPoint topRight,
                                              ResultPoint bottomLeft) {
      // Take the average
      return (calculateModuleSizeOneWay(topLeft, topRight) +
          calculateModuleSizeOneWay(topLeft, bottomLeft)) / 2.0f;
    }
docs: <p>Computes an average estimated module size based on estimated derived from the positions
  of the three finder patterns.</p>
  
  @param topLeft detected top-left finder pattern center
  @param topRight detected top-right finder pattern center
  @param bottomLeft detected bottom-left finder pattern center
  @return estimated module size