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Arthur151 / ROMP

Monocular, One-stage, Regression of Multiple 3D People and their 3D positions & trajectories in camera & global coordinates. ROMP[ICCV21], BEV[CVPR22], TRACE[CVPR2023]
https://www.yusun.work/
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Question about "poses" in results file #203

Closed hsauod closed 2 years ago

hsauod commented 2 years ago

Hi Arthur, great congratulations to your wonderful work!

I saw you mentioned that, "poses" in the result file come from rotation, which is parent relatived. But who's pelvis' parent? Could you please give me any information that how did you calculate pelvis's rotation( very first 3 elements of 72 )?

Arthur151 commented 2 years ago

Hi, good question. Rotation at pelvis is global rotation of entire body, which could be regarded as the human 3D orientation. You can take the background/world coordinate as the parent of pelvis.

hsauod commented 2 years ago

Hi, good question. Rotation at pelvis is global rotation of entire body, which could be regarded as the human 3D orientation. You can take the background/world coordinate as the parent of pelvis.

Thank you very much for your quick response, Arthur! 1, May I know how did you define the origin and axis orientation in that world coordinate?

2, I just want to make sure that the rest 69 elements (72 - 3 = 69 ) in "poses" are radians (thetax, thetay, theta*z), am I right?

Arthur151 commented 2 years ago

These are just the pose parameters of SMPL model. Please refer to that/our paper for details.

  1. It takes the pelvis as the origin.
  2. the rest 69 poses are 3-dim axis-angle rotation.
hsauod commented 2 years ago

These are just the pose parameters of SMPL model. Please refer to that/our paper for details.

  1. It takes the pelvis as the origin.
  2. the rest 69 poses are 3-dim axis-angle rotation.

Thank you very much for your clarifying , Arthur!