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ONLY: One-Layer Intervention Sufficiently Mitigates Hallucinations in Large Vision-Language Models

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arxiv 2507.00898 v1 pith:TRZR7YWZ submitted 2025-07-01 cs.CV cs.CL

ONLY: One-Layer Intervention Sufficiently Mitigates Hallucinations in Large Vision-Language Models

classification cs.CV cs.CL
keywords onlydecodingtextualacrossapplicationsdeploymentinterventionlarge
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Recent Large Vision-Language Models (LVLMs) have introduced a new paradigm for understanding and reasoning about image input through textual responses. Although they have achieved remarkable performance across a range of multi-modal tasks, they face the persistent challenge of hallucination, which introduces practical weaknesses and raises concerns about their reliable deployment in real-world applications. Existing work has explored contrastive decoding approaches to mitigate this issue, where the output of the original LVLM is compared and contrasted with that of a perturbed version. However, these methods require two or more queries that slow down LVLM response generation, making them less suitable for real-time applications. To overcome this limitation, we propose ONLY, a training-free decoding approach that requires only a single query and a one-layer intervention during decoding, enabling efficient real-time deployment. Specifically, we enhance textual outputs by selectively amplifying crucial textual information using a text-to-visual entropy ratio for each token. Extensive experimental results demonstrate that our proposed ONLY consistently outperforms state-of-the-art methods across various benchmarks while requiring minimal implementation effort and computational cost. Code is available at https://github.com/zifuwan/ONLY.

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Forward citations

Cited by 7 Pith papers

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

  1. Mitigating Action-Relation Hallucinations in LVLMs via Relation-aware Visual Enhancement

    cs.CV 2026-05 unverdicted novelty 6.0

    A new attention-enhancement method using ARS scores and RVE reduces action-relation hallucinations in LVLMs while generalizing to spatial and object hallucinations.

  2. HypEHR: Hyperbolic Modeling of Electronic Health Records for Efficient Question Answering

    cs.AI 2026-04 unverdicted novelty 6.0

    HypEHR is a hyperbolic embedding model for EHR data that uses Lorentzian geometry and hierarchy-aware pretraining to answer clinical questions nearly as well as large language models but with much smaller size.

  3. 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.

  4. Revis: Sparse Latent Steering to Mitigate Object Hallucination in Large Vision-Language Models

    cs.AI 2026-02 unverdicted novelty 6.0

    REVIS reduces object hallucination in large vision-language models by about 19% via sparse orthogonal projection in latent space at suppression depths while keeping reasoning intact.

  5. Disentangling Semantic Attention from Structural Bias in the Attention Manifold

    cs.CV 2026-07 conditional novelty 5.0

    SPAR removes a query-averaged structural bias from text-to-image attention and redistributes the reclaimed probability mass, reducing reported object and induced hallucinations in LLaVA models.

  6. VisionPulse: Dynamic Visual Sparsity for Efficient Multimodal Reasoning

    cs.CV 2026-05 unverdicted novelty 5.0

    VisionPulse is a step-wise visual token pruning method for LMMs that retains 5% of tokens per step, shortens reasoning traces by 11.2%, and maintains accuracy.

  7. HypEHR: Hyperbolic Modeling of Electronic Health Records for Efficient Question Answering

    cs.AI 2026-04 conditional novelty 5.0

    A 22M-parameter hyperbolic model answers structured EHR questions with accuracy close to LLM-based systems (EHRXQA 89.5%, MIMIC-Instr 76.0%).