CutPaste&Find: Efficient Multimodal Hallucination Detector with Visual-aid Knowledge Base

• URL: http://arxiv.org/abs/2502.12591v1
• Date: Tue, 18 Feb 2025 07:06:36 GMT
• Title: CutPaste&Find: Efficient Multimodal Hallucination Detector with Visual-aid Knowledge Base
• Authors: Cong-Duy Nguyen, Xiaobao Wu, Duc Anh Vu, Shuai Zhao, Thong Nguyen, Anh Tuan Luu,
• Abstract summary: We propose CutPaste&Find, a lightweight and training-free framework for detecting hallucinations in LVLM-generated outputs.<n>At the core of our framework is a Visual-aid Knowledge Base that encodes rich entity-attribute relationships and associated image representations.<n>We introduce a scaling factor to refine similarity scores, mitigating the issue of suboptimal alignment values even for ground-truth image-text pairs.
• Score: 29.477973983931083
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Large Vision-Language Models (LVLMs) have demonstrated impressive multimodal reasoning capabilities, but they remain susceptible to hallucination, particularly object hallucination where non-existent objects or incorrect attributes are fabricated in generated descriptions. Existing detection methods achieve strong performance but rely heavily on expensive API calls and iterative LVLM-based validation, making them impractical for large-scale or offline use. To address these limitations, we propose CutPaste\&Find, a lightweight and training-free framework for detecting hallucinations in LVLM-generated outputs. Our approach leverages off-the-shelf visual and linguistic modules to perform multi-step verification efficiently without requiring LVLM inference. At the core of our framework is a Visual-aid Knowledge Base that encodes rich entity-attribute relationships and associated image representations. We introduce a scaling factor to refine similarity scores, mitigating the issue of suboptimal alignment values even for ground-truth image-text pairs. Comprehensive evaluations on benchmark datasets, including POPE and R-Bench, demonstrate that CutPaste\&Find achieves competitive hallucination detection performance while being significantly more efficient and cost-effective than previous methods.

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