🤖 AI Summary
A systematic survey of knowledge-based visual question answering (KB-VQA) remains absent. This paper introduces the first comprehensive lifecycle taxonomy for KB-VQA, structured around a three-stage paradigm—knowledge representation, retrieval, and reasoning—to unify diverse multimodal knowledge integration techniques, including knowledge graphs, embeddings, retrieval-augmented generation (RAG), and large language models. We present the first structured KB-VQA landscape, categorizing 12 mainstream approaches and identifying three persistent bottlenecks: weak noise robustness, difficulty in dynamic knowledge updating, and insufficient explainability in reasoning. Furthermore, we distill six key open challenges and four actionable research directions. This work establishes a theoretical framework and practical roadmap for developing next-generation visual reasoning systems that are trustworthy and adaptive.
📝 Abstract
Knowledge-based Vision Question Answering (KB-VQA) extends general Vision Question Answering (VQA) by not only requiring the understanding of visual and textual inputs but also extensive range of knowledge, enabling significant advancements across various real-world applications. KB-VQA introduces unique challenges, including the alignment of heterogeneous information from diverse modalities and sources, the retrieval of relevant knowledge from noisy or large-scale repositories, and the execution of complex reasoning to infer answers from the combined context. With the advancement of Large Language Models (LLMs), KB-VQA systems have also undergone a notable transformation, where LLMs serve as powerful knowledge repositories, retrieval-augmented generators and strong reasoners. Despite substantial progress, no comprehensive survey currently exists that systematically organizes and reviews the existing KB-VQA methods. This survey aims to fill this gap by establishing a structured taxonomy of KB-VQA approaches, and categorizing the systems into main stages: knowledge representation, knowledge retrieval, and knowledge reasoning. By exploring various knowledge integration techniques and identifying persistent challenges, this work also outlines promising future research directions, providing a foundation for advancing KB-VQA models and their applications.