Contextual Self-paced Learning for Weakly Supervised Spatio-Temporal Video Grounding

Akash Kumar; Zsolt Kira; Yogesh Singh Rawat

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arXiv · 2501.17053

Contextual Self-paced Learning for Weakly Supervised Spatio-Temporal Video Grounding

Akash Kumar·Zsolt Kira·Yogesh Singh Rawat

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Abstract

In this work, we focus on Weakly Supervised Spatio-Temporal Video Grounding (WSTVG). It is a multimodal task aimed at localizing specific subjects spatio-temporally based on textual queries without bounding box supervision. Motivated by recent advancements in multi-modal foundation models for grounding tasks, we first explore the potential of state-of-the-art object detection models for WSTVG. Despite their robust zero-shot capabilities, our adaptation reveals significant limitations, including inconsistent temporal predictions, inadequate understanding of complex queries, and challenges in adapting to difficult scenarios. We propose CoSPaL (Contextual Self-Paced Learning), a novel approach which is designed to overcome these limitations. CoSPaL integrates three core components: (1) Tubelet Phrase Grounding (TPG), which introduces spatio-temporal prediction by linking textual queries to tubelets; (2) Contextual Referral Grounding (CRG), which improves comprehension of complex queries by extracting contextual information to refine object identification over time; and (3) Self-Paced Scene Understanding (SPS), a training paradigm that progressively increases task difficulty, enabling the model to adapt to complex scenarios by transitioning from coarse to fine-grained understanding.

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BibTeX RIS

Akash Kumar, Zsolt Kira, Yogesh Singh Rawat. 2025-01-28. Contextual Self-paced Learning for Weakly Supervised Spatio-Temporal Video Grounding. https://arxiv.org/abs/2501.17053

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