Fig. 6. Class frequency distributions of typical 3D action localization datasets.

In contrast to the pre-existing dataset PKU-MMD³², our new dataset BABEL-TAL-20 (BT-20) demonstrates a more pronounced long-tailed class distribution in both training and validation samples, aligning better with visual patterns encountered in real-world applications. a Class frequency distributions of PKU-MMD. b Class frequency distributions of the introduced BT-20. PKU-MMD: Peking University Multi-Modal Dataset.