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vchoutas / smplx

SMPL-X
https://smpl-x.is.tue.mpg.de/
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what does the use_pca param means in SMPLH model? #150

Open lucasjinreal opened 1 year ago

lucasjinreal commented 1 year ago

Hello, may I ask what does the use_pca param means in SMPLH model?

nehc0 commented 3 months ago

I found this: hand_pose_dim = num_pca_comps if use_pca else 3 * self.NUM_HAND_JOINTS https://github.com/vchoutas/smplx/blob/1265df7ba545e8b00f72e7c557c766e15c71632f/smplx/body_models.py#L641 I guess use_pca=False means we don't use the pca components to determine hand pose (like for body shape), rather we use the rotation vector to determine hand pose (like for body joints pose). But I'm not sure. Maybe if I already have the rotation vectors for the joints(body, hand, ...), I should set use_pca=False.