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Nan Liu

12 accepted papers

2026

Fair-FedMOE: Group-Fair One-Shot Federated Learning via Prototype-Guided Experts for Medical Imaging Analysis

ICML 2026poster

Group fairness can ensure equitable performance across different demographic subgroups for medical image analysis. However, the current fine-tuned foundation models (FMs) exhibit significant subgroup disparity. One-shot federated learning (OFL) can potentially mitigate this by leveraging cross-insti…

Cited by 0SourceScholar
2026

Foundation VAE for CT Reconstruction, Augmentation, and Generation

ICML 2026poster

Variational autoencoders (VAEs) compress high resolution CT volumes into compact latents while preserving clinically relevant structure. However, training CT-specific VAEs from scratch or heavily fine-tuning them incurs substantial computational and engineering cost, and often degrades under heterog…

Cited by 0SourceScholar
2026

Learning Effective Sign Features without Text for Gloss-free Sign Language Translation

CVPR 2026

Self-supervised learning (SSL) has achieved remarkable success across both NLP and CV domains. However, sign language translation (SLT) models still heavily rely on gloss annotations in gloss-based SLT or text annotations in gloss-free SLT (GFSLT) during pretraining, aiming to ensure that the backbo

Cited by 0SourceScholar
2025

MMLU-ProX: A Multilingual Benchmark for Advanced Large Language Model Evaluation

EMNLP 2025

Existing large language model (LLM) evaluation benchmarks primarily focus on English, while current multilingual tasks lack parallel questions that specifically assess cross-lingual reasoning abilities. This dual limitation makes it challenging to assess LLMs’ performance in the multilingual setting

Cited by 0SourcePDFScholar
2024

Compositional Image Decomposition with Diffusion Models

ICML 2024poster

Given an image of a natural scene, we are able to quickly decompose it into a set of components such as objects, lighting, shadows, and foreground. We can then envision a scene where we combine certain components with those from other images, for instance a set of objects from our bedroom and animal…

2024

M&M VTO: Multi-Garment Virtual Try-On and Editing

CVPR 2024highlight

We present M&M VTO-a mix and match virtual try-on method that takes as input multiple garment images text description for garment layout and an image of a person. An example input includes: an image of a shirt an image of a pair of pants "rolled sleeves shirt tucked in" and an image of a person. The…

2023

Unsupervised Compositional Concepts Discovery with Text-to-Image Generative Models

ICCV 2023poster

Text-to-image generative models have enabled high-resolution image synthesis across different domains, but require users to specify the content they wish to generate. In this paper, we consider the inverse problem - given a collection of different images, can we discover the generative concepts that…

Cited by 14PDFScholar
2022

Compositional Visual Generation with Composable Diffusion Models

ECCV 2022poster

"Large text-guided diffusion models, such as DALLE-2, are able to generate stunning photorealistic images given natural language descriptions. While such models are highly flexible, they struggle to understand the composition of certain concepts, such as confusing the attributes of different objects…

2022

FIBER: Fill-in-the-Blanks as a Challenging Video Understanding Evaluation Framework

ACL 2022long

We propose fill-in-the-blanks as a video understanding evaluation framework and introduce FIBER – a novel dataset consisting of 28,000 videos and descriptions in support of this evaluation framework. The fill-in-the-blanks setting tests a model’s understanding of a video by requiring it to predict a…

2022

Towards Comprehensive Representation Enhancement in Semantics-Guided Self-Supervised Monocular Depth Estimation

ECCV 2022poster

"Semantics-guided self-supervised monocular depth estimation has been widely researched, owing to the strong cross-task correlation of depth and semantics. However, since depth estimation and semantic segmentation are fundamentally two types of tasks: one is regression while the other is classificat…

Cited by 23SourcePDFScholar