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Xichen Pan

6 accepted papers

2026

Think Then Embed: Generative Context Improves Multimodal Embedding

ICLR 2026poster

There is a growing interest in Universal Multimodal Embeddings (UME), where models are required to generate task-specific representations. While recent studies show that Multimodal Large Language Models (MLLMs) perform well on such tasks, they treat MLLMs solely as encoders, overlooking their genera…

Cited by 0SourceScholar
2025

PISA Experiments: Exploring Physics Post-Training for Video Diffusion Models by Watching Stuff Drop

ICML 2025poster

Large-scale pre-trained video generation models excel in content creation but are not reliable as physically accurate world simulators out of the box. This work studies the process of post-training these models for accurate world modeling through the lens of the simple, yet fundamental, physics task…

2024

Cambrian-1: A Fully Open, Vision-Centric Exploration of Multimodal LLMs

NeurIPS 2024oral

We introduce Cambrian-1, a family of multimodal LLMs (MLLMs) designed with a vision-centric approach. While stronger language models can enhance multimodal capabilities, the design choices for vision components are often insufficiently explored and disconnected from visual representation learning re…

2024

Image Sculpting: Precise Object Editing with 3D Geometry Control

CVPR 2024poster

We present Image Sculpting a new framework for editing 2D images by incorporating tools from 3D geometry and graphics. This approach differs markedly from existing methods which are confined to 2D spaces and typically rely on textual instructions leading to ambiguity and limited control. Image Sculp…

Cited by 15SourcePDFScholar
2024

Kosmos-G: Generating Images in Context with Multimodal Large Language Models

ICLR 2024poster

Recent advancements in subject-driven image generation have made significant strides. However, current methods still fall short in diverse application scenarios, as they require test-time tuning and cannot accept interleaved multi-image and text input. These limitations keep them far from the ultima…

2022

Leveraging Unimodal Self-Supervised Learning for Multimodal Audio-Visual Speech Recognition

ACL 2022long

Training Transformer-based models demands a large amount of data, while obtaining aligned and labelled data in multimodality is rather cost-demanding, especially for audio-visual speech recognition (AVSR). Thus it makes a lot of sense to make use of unlabelled unimodal data. On the other side, altho…