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Lei Yi

3 accepted papers

2025

ASPO: Adaptive Sentence-Level Preference Optimization for Fine-Grained Multimodal Reasoning

ACL 2025finding

Direct Preference Optimization (DPO) has gained significant attention for its simplicity and computational efficiency in aligning large language models (LLMs). Recent advancements have extended DPO to multimodal scenarios, achieving strong performance. However, traditional DPO relies on binary prefe…

Cited by 0SourcePDFScholar
2025

CoF: Coarse to Fine-Grained Image Understanding for Multi-modal Large Language Models

ICASSP 2025accepted

The impressive performance of Large Language Model (LLM) has prompted researchers to develop Multi-modal LLM (MLLM), which has shown great potential for various multi-modal tasks. However, current MLLM often struggles to effectively address fine-grained multi-modal challenges. We argue that this lim…

Cited by 0SourceScholar
2025

Enhancing Fine-Grained Vision-Language Pretraining with Negative Augmented Samples

AAAI 2025technical

Existing Vision-Language Pretraining (VLP) methods have achieved remarkable improvements across a variety of vision-language tasks, confirming their effectiveness in capturing coarse-grained semantic correlations. However, their capability for fine-grained understanding, which is critical for many…

Cited by 2SourcePDFScholar