normalized n abs error

box-metrics.py

@@ -201,6 +201,8 @@ class box_metrics(evaluate.Metric):
                                     "e_height_mean": np.mean(e_heights),
                                     "e_n_bottom_x_mean": np.mean(e_n_bottom_x),
                                     "e_n_bottom_y_mean": np.mean(e_n_bottom_y),
+                                    "e_n_abs_bottom_x_mean": np.mean(np.abs(e_n_bottom_x)),
+                                    "e_n_abs_bottom_y_mean": np.mean(np.abs(e_n_bottom_y)),
                                     "e_n_width_mean": np.mean(e_n_widths),
                                     "e_n_height_mean": np.mean(e_n_heights),
                                     "e_bottom_x_std": np.std(e_bottom_x),