Relation Modeling in Spatio-Temporal Action Localization

This paper presents our solution to the AVA-Kinetics Crossover Challenge of ActivityNet workshop at CVPR 2021. Our solution utilizes multiple types of relation modeling methods for spatio-temporal action detection and adopts a training strategy to integrate multiple relation modeling in end-to-end training over the two large-scale video datasets. Learning with memory bank and finetuning for long-tailed distribution are also investigated to further improve the performance. In this paper, we detail the implementations of our solution and provide experiments results and corresponding discussions. We finally achieve 40.67 mAP on the test set of AVA-Kinetics.

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Results from the Paper

Task Dataset Model Metric Name Metric Value Global Rank Uses Extra
Training Data
Result Benchmark
Spatio-Temporal Action Localization AVA-Kinetics RM (multi-scale, ir-CSN-152) val mAP 37.95 # 5
Spatio-Temporal Action Localization AVA-Kinetics RM (multi-scale, ensemble) val mAP 40.97 # 3
test mAP 40.67 # 1


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