Hard: Min. bounding box height: 25 Px, Max. occlusion level: Difficult to see, Max. truncation: 50 %
The difficulty is printed along with all other object information with the method print_object.
Furthermore in dataset_viz function I added a small bunch of code that prints all the objects in the ground truth that are not 'DontCare'.
In Object3D class I have added a small method that computes the difficulty to detect an object as defined in KITTI website(http://www.cvlibs.net/datasets/kitti/eval_object.php?obj_benchmark=3d):
Furthermore in dataset_viz function I added a small bunch of code that prints all the objects in the ground truth that are not 'DontCare'.