some useful visualization tools
+── Geometric
│ +── visualize_depth_map
│ +── visualize_normal_map
│ +── visualize_optical_flow
│ +── ...
|
+── Matplotlib
| +── some visualization scripts using matplotlib
|
+── OpenCV
| +── image_blended
| +── image_concat
| +── image_draw_bbox
| +── ...