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Taro Watanabe

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#natural language process... Preprint Sep 2026

Overfitting Mitigation via Singular Value Decomposition in Minimum Bayes Risk Decoding

This work introduces SVD-MBR, which frames the pairwise utility matrix as a noisy information signal, and reveals that this denoising is metric-dependent: neural metrics encode a robust low-rank consensus ideal for SVD, whereas surface-level metrics struggle to separate signal from metric noise.

Riza Setiawan Soetedjo, Yusuke Sakai, Hidetaka Kamigaito et al. · 0 citations
#computer vision Preprint Sep 2026

ExpArt-KG: Artwork Image Description Generation through Iterative Exploration of Knowledge Graphs

This work proposes a framework that efficiently exploits factual information from a knowledge graph via retrieval-augmented generation via retrieval-augmented generation (RAG), with the goal of enabling LVLMs to generate detailed and accurate image explanations.

Y. Kato, Shintaro Ozaki, Kazuki Hayashi et al. · 0 citations
Preprint Aug 2026

Simile Understanding in Text-to-Image Models: An Evaluation Framework

A scalable evaluation framework for simile understanding is proposed that includes a controlled simile dataset in which metaphorical vehicles are drawn from a predefined set of object-detectable categories and combined with diverse templates.

Luecheng Wang, Shintaro Ozaki, Hidetaka Kamigaito et al. · 0 citations
2026

Random Character-Level Perturbations Amplify LLM Jailbreak Attacks

This work finds that models cannot reliably reconstruct the original meaning and layer-wise probe classifiers fail to detect the harmful intent of perturbed prompts, and perturbations can occasionally reduce attack success by inducing off-topic or incoherent responses.

Shuyi Yu, Zhe Cao, Kohei Tsuji et al. · 1 citation

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