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Mark A. Hasegawa-Johnson

6 accepted papers

2025

Can Video LLMs Refuse to Answer? Alignment for Answerability in Video Large Language Models

ICLR 2025poster

In the broader context of deep learning, Multimodal Large Language Models have achieved significant breakthroughs by leveraging powerful Large Language Models as a backbone to align different modalities into the language space. A prime exemplification is the development of Video Large Language Model…

Cited by 0SourcePDFScholar
2025

ConfPO: Exploiting Policy Model Confidence for Critical Token Selection in Preference Optimization

ICML 2025poster

We introduce ConfPO, a method for preference learning in Large Language Models (LLMs) that identifies and optimizes preference-critical tokens based solely on the training policy's confidence, without requiring any auxiliary models or compute. Unlike prior Direct Alignment Algorithms (DAAs) such as…

2024

C-TPT: Calibrated Test-Time Prompt Tuning for Vision-Language Models via Text Feature Dispersion

ICLR 2024poster

In deep learning, test-time adaptation has gained attention as a method for model fine-tuning without the need for labeled data. A prime exemplification is the recently proposed test-time prompt tuning for large-scale vision-language models such as CLIP. Unfortunately, these prompts have been mainly…

2024

Query-based Cross-Modal Projector Bolstering Mamba Multimodal LLM

EMNLP 2024finding

The Transformer’s quadratic complexity with input length imposes an unsustainable computational load on large language models (LLMs). In contrast, the Selective Scan Structured State-Space Model, or Mamba, addresses this computational challenge effectively. This paper explores a query-based cross-mo…

Cited by 0SourcePDFScholar
2024

Speech Self-Supervised Learning Using Diffusion Model Synthetic Data

ICML 2024oral

While self-supervised learning (SSL) in speech has greatly reduced the reliance of speech processing systems on annotated corpora, the success of SSL still hinges on the availability of a large-scale unannotated corpus, which is still often impractical for many low-resource languages or under privac…