SnapshotPeople preprocessed dataset

[sylcito]

Hello, I have another question:
I download the preprocessed SnapshotPeople dataset provided in the link, and I test it using the male-3-casual sample.
We use the data from InstantAvatar and finetuned their pre-processed poses to get SMPL-X fits.
First, I decode the 000.pkl file in the smplx_finetune/result directory, and I notice that the shapes of left_hand_pose and right_hand_pose are both (1, 12). However, theoretically, the left_hand_pose/right_hand_pose outputs of SMPL-X are typically (15, 3). I understand that enabling the parameter num_pca_comps=12 reduces the hand pose dimension from 15 to 12, but why is the other dimension 1 instead of 3?

[david-svitov]

Here is the code I used to get SMPL-X: #10 (comment)
I hope it will answer all possible questions regarding SMPL-X parameters