Cristian Rodriguez-Opazo - DORi

Talking Papers Podcast

Paper title:
"DORi: Discovering Object Relationships for Moment Localization of a Natural Language Query in a Video"
Authors: Cristian Rodriguez-Opazo, Edison Marrese-Taylor, Basura Fernando, Hongdong Li, Stephen Gould
Abstract:
This paper studies the task of temporal moment localization in a long untrimmed video using natural language query. Given a query sentence, the goal is to determine the start and end of the relevant segment within the video. Our key innovation is to learn a video feature embedding through a language-conditioned message-passing algorithm suitable for temporal moment localization which captures the relationships between humans, objects and activities in the video. These relationships are obtained by a spatial subgraph that contextualized the scene representation using detected objects and human features. Moreover, a temporal sub-graph captures the activities within the video through time. Our method is evaluated on three standard benchmark datasets, and we also introduce YouCook II as a new benchmark for this task. Experiments show our method outperforms state-of-the-art methods on these datasets, confirming the effectiveness of our approach
RESOURCES
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Cristian's page: https://crodriguezo.github.io/
Code:
https://github.com/crodriguezo/DORi
Related papers:
"Proposal free temporal moment localization" : https://bit.ly/3EX1qCM
"Action Genome: Actions As Compositions of Spatio-Temporal Scene Graphs" : https://bit.ly/3zt4aXA
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Recorded on March, 26th 2021.

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Chapters

1. Cristian Rodriguez-Opazo - DORi (00:00:00)

2. Intro (00:00:02)

3. Abstract (00:01:09)

4. Motivation (00:01:55)

5. Related Work (00:05:03)

6. Approach (00:07:46)

7. Results (00:15:17)

8. Conclusions and future work (00:19:02)

9. What did reviewer 2 say? (00:22:10)