How to Parsing SMPL-X Parameters in ActorsHQ Dataset?

[yiyuzhuang]

How to Parsing SMPL-X Parameters in ActorsHQ Dataset?

[qianqiuzzz]

@yiyuzhuang 我注意到您展示的图有人物的mesh，请问这个mesh是数据集提供的msehes.abc.xz文件吗，您是怎么解压这个压缩包的呢

[Pbb-land]

@yiyuzhuang @isikmustafa Hi, I was having the same problem, have you been able to solve it?

[Zielon]

Probably your problem is that the poses vector in the JSON file has the first three components set to zero. They usually represent global rotation, however, in this case, it is put to the Rh field instead.

[
    {
        "id": 0,
        "Rh": [
          [0.04361098, 0.07433257, -0.02178280]
        ],
        "Th": [
          [0.00391468, 1.32414436, 0.03250297]
        ],
        "poses": [
          [**0.00000000, 0.00000000, 0.00000000**, -0.11908470, -0.03610654, 0.05601613, ...]
        ],
        "expression": [
          [-0.00000144, -0.00000581, 0.00000272, -0.00000236, ...]
        ],
        "shapes": [
          [-0.32091987, 0.09722190, 0.04891836, ...]
        ]
    }
]

Then depending on which implementation of SMPL you are using you need to take care of the correct mapping poses and Rh. The fix np.concatenate([smplx["Rh"], smplx["poses"][3:]], axis=-1) passed as pose can help.