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Liwei Chen

9 accepted papers

2026

FSFSplatter: Geometrically Accurate Reconstruction with Free Sparse-view Images within 2 minutes

CVPR 2026

Gaussian Splatting has become a leading reconstruction technique, known for its high-quality novel view synthesis and detailed reconstruction. However, most existing methods require dense, calibrated views. Reconstruction from free sparse-view images often leads to poor surface due to limited overla

Cited by 0SourcecodeScholar
2025

Following the Autoregressive Nature of LLM Embeddings via Compression and Alignment

EMNLP 2025

A new trend uses LLMs as dense text encoders via contrastive learning. However, since LLM embeddings predict the probability distribution of the next token, they are inherently generative and distributive, conflicting with contrastive learning, which requires embeddings to capture full-text semantic

2025

Granularity-Adaptive Spatial Evidence Tokenization for Video Question Answering

AAAI 2025technical

Video question answering plays a vital role in computer vision, and recent advances in large language models have further propelled the development of this field. However, existing video question answering techniques often face limitations in grasping fine-grained video content in spatial dimensions…

Cited by 0SourcePDFScholar
2024

CPMSVD: Cross-Project Multiclass Software Vulnerability Detection Via Fused Deep Feature and Domain Adaptation

ICASSP 2024accepted

Many deep learning-based approaches have achieved excellent performance for Software Vulnerability Detection(SVD) but the most imperative issue is coping with the scarcity of labeled software vulnerabilities. When employing transfer learning techniques, researchers only detected the presence of vuln…

Cited by 0SourceScholar
2024

Harder Task Needs More Experts: Dynamic Routing in MoE Models

ACL 2024long

In this paper, we introduce a novel dynamic expert selection framework for Mixture of Experts (MoE) models, aiming to enhance computational efficiency and model performance by adjusting the number of activated experts based on input difficulty. Unlike existing MoE approaches that rely on fixed TopK…

2024

Probing Multimodal Large Language Models for Global and Local Semantic Representations

COLING 2024main

The advancement of Multimodal Large Language Models (MLLMs) has greatly accelerated the development of applications in understanding integrated texts and images. Recent works leverage image-caption datasets to train MLLMs, achieving state-of-the-art performance on image-to-text tasks. However, there…

2024

RectifID: Personalizing Rectified Flow with Anchored Classifier Guidance

NeurIPS 2024poster

Customizing diffusion models to generate identity-preserving images from user-provided reference images is an intriguing new problem. The prevalent approaches typically require training on extensive domain-specific images to achieve identity preservation, which lacks flexibility across different use…

2024

Unified Language-Vision Pretraining in LLM with Dynamic Discrete Visual Tokenization

ICLR 2024poster

Recently, the remarkable advance of the Large Language Model (LLM) has inspired researchers to transfer its extraordinary reasoning capability to both vision and language data. However, the prevailing approaches primarily regard the visual input as a prompt and focus exclusively on optimizing the te…

2024

Video-LaVIT: Unified Video-Language Pre-training with Decoupled Visual-Motional Tokenization

ICML 2024oral

In light of recent advances in multimodal Large Language Models (LLMs), there is increasing attention to scaling them from image-text data to more informative real-world videos. Compared to static images, video poses unique challenges for effective large-scale pre-training due to the modeling of its…