Abstract: In recent years, multi-label zero-shot learning (ML-ZSL) has garnered increasing attention because of its wide range of potential applications, such as image annotation, text classification, and bioinformatics. The central challenge in ML-ZSL lies in predicting multiple labels for unseen classes without requiring any labeled training data, which contrasts with conventional supervised learning paradigms. However, existing methods face several significant challenges. These include the substantial semantic gap between different modalities, which impedes effective knowledge transfer, and the intricate and typically complex relationships among multiple labels, making it difficult to model them in a meaningful and accurate manner. To overcome these challenges, we propose a graph-augmented multimodal chain-of-thought (GMCoT) reasoning approach. The proposed method combines the strengths of multimodal large language models with graph-based structures, significantly enhancing the reasoning process involved in multi-label prediction. First, a novel multimodal chain-of-thought reasoning framework is presented which imitates human-like step-by-step reasoning to produce multi-label predictions. Second, a technique is presented for integrating label graphs into the reasoning process. This technique enables the capture of complex semantic relationships among labels, thereby improving the accuracy and consistency of multi-label generation. Comprehensive experiments on benchmark datasets demonstrate that the proposed GMCoT approach outperforms state-of-the-art methods in ML-ZSL.

Key words: Chain-of-thought; Multi-label zero-shot learning; Multimodal reasoning; Large language model

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