• 2 Related Work
  • General Video Classification
• 3
  • 3.2 Spatio-Temporal Graph

• CVPR 2020
• https://openaccess.thecvf.com/content_CVPR_2020/papers/Pan_Spatio-Temporal_Graph_for_Video_Captioning_With_Knowledge_Distillation_CVPR_2020_paper.pdf
• spatio-temporal graph model for video captioning that exploits object interactions in space and time
• two-branch, knowledge distillatio

2 Related Work

General Video Classification

• 3D conv
• two-stream, optical flow
• wider range
• SlowFast, multiple time scales, two pathways
• feature bank, long-term, correlated, short-term
• raw pixels, in contrast, objects within scenes

3

• two-branch, distill
• scene, 2D, resnet, 3D, I3D
• object features: \(N_T\) objects, each \(o_t^j\) has the same dimension

3.2 Spatio-Temporal Graph

• decompose our graph into two components: the spatial graph and the temporal graph
• Spatial: normalized Intersection over Union (IoU) value, explicitly
• temporal: object transformations, semantic similarities, \(cos\)
  
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