Unsupervised Video Summarization Based on Spatiotemporal Semantic Graph and Enhanced Attention Mechanism

Generative adversarial networks (GANs) have demonstrated potential in enhancing keyframe selection and video reconstruction via adversarial training among unsupervised approaches. Nevertheless, GANs struggle to encapsulate the intricate spatiotemporal dynamics in videos, which is essential for producing coherent and informative summaries. To address these challenges, we introduce an unsupervised video summarization framework that synergistically integrates temporal–spatial semantic graphs (TSSGraphs) with a bilinear additive attention (BAA) mechanism. TSSGraphs are designed to effectively model temporal and spatial relationships among video frames by combining temporal convolution and dynamic edge convolution, thereby extracting salient features while mitigating model complexity. The BAA mechanism enhances the framework’s ability to capture critical motion information by addressing feature sparsity and eliminating redundant parameters, ensuring robust attention to significant motion dynamics. Experimental assessments on the SumMe and TVSum benchmark datasets reveal that our method attains improvements of up to 4.0% and 3.3% in F-score, respectively, compared to current methodologies. Moreover, our system demonstrates diminished parameter overhead throughout training and inference stages, particularly excelling in contexts with significant motion content.