Human36mDataset: Discrepancy in parent and children nodes

[ualiawan]

In Human36mDataset, parent node for node 11 and 14 is node 8, while in the children list, both node 11 and 14 are listed as children of node 7.

	path = "p[ath/to/npz"
	h36m = Human36mDataset(path)

	parents= h36m._skeleton.parents()
	print([(i,p) for i, p in enumerate(parents)], "parents")

	children= h36m._skeleton.children()
	print([(i,c) for i, c in enumerate(children)], "children")

Output:

[(0, -1), (1, 0), (2, 1), (3, 2), (4, 0), (5, 4), (6, 5), (7, 0), (8, 7), (9, 8), (10, 9), (11, 8), (12, 11), (13, 12), (14, 8), (15, 14), (16, 15)] parents
[(0, [1, 4, 7]), (1, [2]), (2, [3]), (3, []), (4, [5]), (5, [6]), (6, []), (7, [8, 11, 14]), (8, [9]), (9, [10]), (10, []), (11, [12]), (12, [13]), (13, []), (14, [15]), (15, [16]), (16, [])] children

If we look closely, node 11 and 14 are LeftShoulder and RightShoulder, while 7 and 8 are Spine and Thorax, respectively. So, parent lists says that Left and Right shoulder have Thorax as parent, while the children list say that they are children of Spine.