Learning Correlation Structures for Vision Transformers
Manjin Kim Paul Hongsuck Seo Cordelia Schmid Minsu Cho
We introduce a new attention mechanism, dubbed structural self-attention
(StructSA), that leverages rich correlation patterns naturally emerging in
key-query interactions of attention. StructSA generates attention maps by
recognizing space-time structures of key-query correlations via convolution and
uses them to dynamically aggregate local contexts of value features. This
effectively leverages rich structural patterns in images and videos such as
scene layouts, object motion, and inter-object relations. Using StructSA as a
main building block, we develop the structural vision transformer (StructViT)
and evaluate its effectiveness on both image and video classification tasks,
achieving state-of-the-art results on ImageNet-1K, Kinetics-400,
Something-Something V1 & V2, Diving-48, and FineGym.