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Lei Tian

8 accepted papers

2025

CCL-LGS: Contrastive Codebook Learning for 3D Language Gaussian Splatting

ICCV 2025poster

Recent advances in 3D reconstruction techniques and vision-language models have fueled significant progress in 3D semantic understanding, a capability critical to robotics, autonomous driving, and virtual/augmented reality. However, methods that rely on 2D priors are prone to a critical challenge: c…

2025

DPC: Large Model Alignment Method based on Decoding Probability Correction

ICASSP 2025accepted

Large language models (LLMs) demonstrate significant generative capabilities but often face ethical alignment and robustness challenges. Conventional alignment methods rely on extensive human-annotated data and require retraining, leading to high computational costs and resource demands. Therefore,…

Cited by 0SourceScholar
2025

Whitened Score Diffusion: A Structured Prior for Imaging Inverse Problems

NeurIPS 2025poster

Conventional score-based diffusion models (DMs) may struggle with anisotropic Gaussian diffusion processes due to the required inversion of covariance matrices in the denoising score matching training objective \cite{vincent_connection_2011}. We propose Whitened Score (WS) diffusion models, a novel…

Cited by 0SourcecodeScholar
2024

AverNet: All-in-one Video Restoration for Time-varying Unknown Degradations

NeurIPS 2024poster

Traditional video restoration approaches were designed to recover clean videos from a specific type of degradation, making them ineffective in handling multiple unknown types of degradation. To address this issue, several studies have been conducted and have shown promising results. However, these s…

2024

MSFR: Stance Detection Based on Multi-Aspect Semantic Feature Representation via Hierarchical Contrastive Learning

ICASSP 2024accepted

Zero-shot stance detection aims to determine the stance of previously unseen targets during the inference phase. Achieving effective feature alignment from seen targets to unseen targets is crucial for zero-shot stance detection. In this paper, we propose MSFR, a hierarchical contrastive learning fr…

Cited by 0SourceScholar
2023

MixTEA: Semi-supervised Entity Alignment with Mixture Teaching

EMNLP 2023long findings

Semi-supervised entity alignment (EA) is a practical and challenging task because of the lack of adequate labeled mappings as training data. Most works address this problem by generating pseudo mappings for unlabeled entities. However, they either suffer from the erroneous (noisy) pseudo mappings or…

Cited by 0SourcecodeScholar
2019

Regularized Fourier Ptychography Using an Online Plug-and-play Algorithm

ICASSP 2019accepted

The plug-and-play priors (PnP) framework has been recently shown to achieve state-of-the-art results in regularized image reconstruction by leveraging a sophisticated denoiser within an iterative algorithm. In this paper, we propose a new online PnP algorithm for Fourier ptychographic microscopy (FP…

Cited by 0SourceScholar
2017

Computational microscopy: illumination coding and nonlinear optimization enables Gigapixel 3D phase imaging

ICASSP 2017accepted

Microscope lenses can have either large field of view (FOV) or high resolution, not both. Computational microscopy based on illumination coding circumvents this limit by fusing images from different illumination angles using nonlinear optimization algorithms. The result is a Gigapixel-scale image ha…

Cited by 0SourceScholar