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facebookresearch / frankmocap

A Strong and Easy-to-use Single View 3D Hand+Body Pose Estimator
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the output of smpl #190

Closed abcliguanxi closed 2 years ago

abcliguanxi commented 2 years ago

thks for the great work! I have three question.

  1. why the smpl_output.joints is [-1,1]?what does it mean if z=1 ?
  2. if the smpl_output. joints location(x y z) is relative distance,Where is the origin of the coordinate system？
  3. if i can get the distance(unit meter) between the R_Knee and R_Hip from smpl_output.joints?

Looking forward to your reply！

penincillin commented 2 years ago

@abcliguanxi

  1. The unit of SMPL coordinates, including both joints and vertices, is meter. Strictly speaking, the joints and verts not strictly lie in [-1, 1].
  2. The raw output of the SMPL has the fixed pelvis coord, which is close but not equal to (0, 0, 0).
  3. You can get distance between R_Knee and R_Hip via calculating L2 distance between these two joints.