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Cross-modal feature dimension comparison.
| Modality type | Original feature dimension | Reduced feature dimension | Semantic correlation analysis |
|---|---|---|---|
| Visual (video) | 2048 × T (T = frames) | 512 | 0.763 (with knowledge graph entities) |
| Textual description | 768 (BERT-base) | 512 | 0.821 (with knowledge graph entities) |
| Motion sequence | 3 J × T (J = joints) | 512 | 0.795 (with knowledge graph entities) |
| Integrated features | – | 768 | 0.879 (with knowledge graph entities) |
