Focal lenght about 3d-multi-person-pose HOT 1 CLOSED

In this work, we do not mention that camera parameters (focal length f) are not needed. In particular, following the AAAI'21 paper, the normalized root length Z/f is estimated instead of Z to avoid the influence of the camera intrinsic parameters as stated in the Supp (TCN structure subsection, page 12).

In order to recover the actual Z value, the focal length needs to be set. In the code, to perform the evaluation, the actual Z value is obtained by Procrustes alignment, which fits the focal length with respect to ground truth (GT):

In the situation that there is no GT, for example in-the-wild videos, using a default focal length value is one option. To accurately recover the actual depth Z, the focal length is needed.

from 3d-multi-person-pose.