A question about PCK threshold computation.

[wolterlw]

How do we compute the torso diameter in 2d to get the threshold? Depending on the person's pose the projected torso length is different. Sorry for a basic question, but could you elaborate on that?

[ben-xD]

I have this confusion too. Torso's are not circular, so they don't have a diameter. At best, we can take the 2 shoulder and 2 hip joints, to make a quadrilaterals. Here is a helpful website, because I forgot what a quadrilateral is 😆: https://www.kidsmathgamesonline.com/pictures/shapes/quadrilaterals.html

[ben-xD]

It is defined in this paper: Simple Multi-Resolution Representation Learning for Human Pose Estimation https://arxiv.org/abs/2004.06366

torso_diameter = right_hip - left_shoulder