1 code implementation • 8 Jun 2021 • Ting-Ting Xie, Christos Tzelepis, Fan Fu, Ioannis Patras
Learning to localize actions in long, cluttered, and untrimmed videos is a hard task, that in the literature has typically been addressed assuming the availability of large amounts of annotated training samples for each class -- either in a fully-supervised setting, where action boundaries are known, or in a weakly-supervised setting, where only class labels are known for each video.
no code implementations • 25 Aug 2020 • Ting-Ting Xie, Christos Tzelepis, Ioannis Patras
We use two uncertainty-aware boundary regression losses: first, the Kullback-Leibler divergence between the ground truth location of the boundary and the Gaussian modeling the prediction of the boundary and second, the expectation of the $\ell_1$ loss under the same Gaussian.
no code implementations • 25 Aug 2020 • Ting-Ting Xie, Christos Tzelepis, Ioannis Patras
Results in the action localization problem show that the incorporation of second order statistics improves over the baseline network, and that VANp surpasses the accuracy of virtually all other two-stage networks without involving any additional parameters.
no code implementations • 25 May 2019 • Ting-Ting Xie, Xiaoshan Yang, Tianzhu Zhang, Changsheng Xu, Ioannis Patras
Temporal action localization has recently attracted significant interest in the Computer Vision community.
no code implementations • 31 Aug 2016 • Ting-Ting Xie, Yuxing Peng, Changjian Wang
Most traditional methods struggle to balance the precision and computational burden when data and its number of classes increased.