What's the meaning of 2* in delta

[innerlee]

What's the meaning of elements of delta?

See https://github.com/AIChallenger/AI_Challenger_2017/blob/master/Evaluation/keypoint_eval/keypoint_eval.py#L50

[Julietty]

@innerlee Hi! I think, it's delta for each keypoint for both sides, like 2 * radius == diameter.

How did you download dataset? If you have it, please, share!