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Visual Hallucinations of Multi-modal Large Language Models

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arxiv 2402.14683 v2 pith:UBEL7N3Z submitted 2024-02-22 cs.CV cs.AIcs.LG

Visual Hallucinations of Multi-modal Large Language Models

classification cs.CV cs.AIcs.LG
keywords instancesexistingvhtestbenchmarkfindimagevisualbenchmarks
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Visual hallucination (VH) means that a multi-modal LLM (MLLM) imagines incorrect details about an image in visual question answering. Existing studies find VH instances only in existing image datasets, which results in biased understanding of MLLMs' performance under VH due to limited diversity of such VH instances. In this work, we propose a tool called VHTest to generate a diverse set of VH instances. Specifically, VHTest finds some initial VH instances in existing image datasets (e.g., COCO), generates a text description for each VH mode, and uses a text-to-image generative model (e.g., DALL-E-3) to generate VH images based on the text descriptions. We collect a benchmark dataset with 1,200 VH instances in 8 VH modes using VHTest. We find that existing MLLMs such as GPT-4V, LLaVA-1.5, and MiniGPT-v2 hallucinate for a large fraction of the instances in our benchmark. Moreover, we find that fine-tuning an MLLM using our benchmark dataset reduces its likelihood to hallucinate without sacrificing its performance on other benchmarks. Our benchmarks are publicly available: https://github.com/wenhuang2000/VHTest.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. What Makes LVLMs Hallucinate Less? Unveiling the Architectural Factors Behind Hallucination Robustness

    cs.CV 2026-05 unverdicted novelty 7.0

    The study links three LVLM architectural dimensions to three hallucination types via a new benchmark, finding that language foundation quality reduces co-occurrence errors, visual encoder strength reduces similarity e...

  2. Investigating Adversarial Robustness of Multi-modal Large Language Models

    cs.CV 2026-06 unverdicted novelty 6.0

    Robust vision encoders from multimodal adversarial pretraining transfer to MLLMs and deliver large gains in adversarial captioning and VQA performance, while test-time stochastic transformations provide an effective b...

  3. Dive into the Scene: Breaking the Perceptual Bottleneck in Vision-Language Decision Making via Focus Plan Generation

    cs.CV 2026-06 unverdicted novelty 6.0

    SceneDiver introduces a coarse-to-fine focus plan generation approach for VLMs that constructs holistic scene graphs then iteratively decomposes tasks, plus a distillation adapter for VLAs, to reduce visual hallucinat...

  4. When Looking Is Not Enough: Visual Attention Structure Reveals Hallucination in MLLMs

    cs.CV 2026-05 unverdicted novelty 6.0

    Layer-wise Laplacian energy of visual attention reveals hallucination emergence in MLLMs and enables LaSCD, a closed-form logit remapping strategy that mitigates hallucinations while preserving general performance.

  5. Mitigating Multimodal Hallucination via Phase-wise Self-reward

    cs.CV 2026-04 unverdicted novelty 6.0

    PSRD mitigates visual hallucinations in LVLMs via phase-wise self-reward decoding, cutting rates by 50% on LLaVA-1.5-7B and outperforming prior methods on five benchmarks.

  6. Measure Twice, Click Once: Co-evolving Proposer and Visual Critic via Reinforcement Learning for GUI Grounding

    cs.LG 2026-04 unverdicted novelty 5.0

    A co-evolving proposer-critic RL framework improves GUI grounding accuracy by letting the model critique its own proposals rendered on screenshots.

  7. Hallucination of Multimodal Large Language Models: A Survey

    cs.CV 2024-04 accept novelty 5.0

    The survey organizes causes of hallucinations in MLLMs, reviews evaluation benchmarks and metrics, and outlines mitigation approaches plus open questions.