Multimodal Alignment with Cross-Attentive GRUs for Fine-Grained Video Understanding
This work addresses the problem of fine-grained video classification for applications such as violence detection and emotion estimation, representing an incremental advancement in multimodal fusion techniques.
The paper tackled fine-grained video understanding by proposing a multimodal framework that fuses video, image, and text representations using GRU-based encoders and cross-modal attention, achieving significant performance improvements over unimodal baselines on benchmarks like DVD and Aff-Wild2.
Fine-grained video classification requires understanding complex spatio-temporal and semantic cues that often exceed the capacity of a single modality. In this paper, we propose a multimodal framework that fuses video, image, and text representations using GRU-based sequence encoders and cross-modal attention mechanisms. The model is trained using a combination of classification or regression loss, depending on the task, and is further regularized through feature-level augmentation and autoencoding techniques. To evaluate the generality of our framework, we conduct experiments on two challenging benchmarks: the DVD dataset for real-world violence detection and the Aff-Wild2 dataset for valence-arousal estimation. Our results demonstrate that the proposed fusion strategy significantly outperforms unimodal baselines, with cross-attention and feature augmentation contributing notably to robustness and performance.