Temporal Action Detection with Structured Segment Networks

Yue Zhao*, Yuanjun Xiong*, Limin Wang, Zhirong Wu, Dahua Lin, Xiaoou Tang


An overview of the structured segment network framework


The Python codes and trained models will be released at

open_in_new Github Link TAG Proposals


Action Proposals with TAG
Dataset Average Number of Proposal Average Recall
THUMOS14 200 48.9%
ActivityNet v1.2 Val. 100 67.3%

Temporal Action Detection with SSN
IOU 0.1 0.2 0.3 0.4 0.5 0.6 0.7
mAP 66.0% 59.4% 51.9% 41.0% 29.8% 19.6% 10.7%
ActivityNet v1.3 Testing Server
IOU 0.5 0.75 0.95 Average
mAP 43.26% 28.70% 5.63% 28.28%

Visualize Detection Results


Please kindly cite the following paper if you find this project helpful.
  author    = {Yue Zhao and Yuanjun Xiong and Limin Wang
               and Zhirong Wu and Dahua Lin and Xiaoou Tang},
  title     = {Temporal Action Detection with Structured Segment Networks},
  booktitle   = {Arxiv Preprint},
  year      = {2017},

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