Multiview Transformers for Video Recognition
Video understanding requires reasoning at multiple spatiotemporal resolutions -- from short fine-grained motions to events taking place over longer durations. Although transformer architectures have recently advanced the state-of-the-art, they have not explicitly modelled different spatiotemporal resolutions. To this end, we present Multiview Transformers for Video Recognition (MTV). Our model consists of separate encoders to represent different views of the input video with lateral connections to fuse information across views. We present thorough ablation studies of our model and show that MTV consistently performs better than single-view counterparts in terms of accuracy and computational cost across a range of model sizes. Furthermore, we achieve state-of-the-art results on six standard datasets, and improve even further with large-scale pretraining. Code and checkpoints are available at: https://github.com/google-research/scenic/tree/main/scenic/projects/mtv.
PDF Abstract CVPR 2022 PDF CVPR 2022 AbstractCode
Colab
ImageNet
Kinetics
Kinetics 400
Something-Something V2
EPIC-KITCHENS-100
Kinetics-600
JFT-300M
MiT
Kinetics-700
Results from the Paper
Ranked #5 on
Action Recognition
on EPIC-KITCHENS-100
(using extra training data)
