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Chunwei Wang

16 accepted papers

2026

SemHiTok: A Unified Image Tokenizer via Semantic-Guided Hierarchical Codebook for Multimodal Understanding and Generation

ICLR 2026poster

In this paper, we introduce SemHiTok, a unified image Tokenizer via Semantic-Guided Hierarchical codebook (SGHC) that provides consistent discrete representations for multimodal understanding and generation. Recently, unified image tokenizers have sparked exploration within the research community, w…

Cited by 0SourceScholar
2026

UniVerse: Empower Unified Generation with Reasoning and Knowledge

CVPR 2026

Current text-to-image (T2I) generation models often struggle with prompts that require complex reasoning or specialized knowledge, failing to accurately interpret implicit user intent. To bridge this gap, we introduce T2I-Reason, a large-scale dataset designed to empower text-to-image generation in

Cited by 0SourcecodeScholar
2025

Brick-Diffusion: Generating Long Videos with Brick-to-Wall Denoising

ICASSP 2025accepted

Recent advances in diffusion models have greatly improved text-driven video generation. However, training models for long video generation demands significant computational power and extensive data, leading most video diffusion models to be limited to a small number of frames. Existing training-free…

Cited by 0SourceScholar
2025

EMOVA: Empowering Language Models to See, Hear and Speak with Vivid Emotions

CVPR 2025poster

GPT-4o, an omni-modal model that enables vocal conversations with diverse emotions and tones, marks a milestone for omni-modal foundation models. However, empowering Large Language Models to perceive and generate images, texts, and speeches end-to-end with publicly available data remains challenging…

Cited by 23SourcePDFScholar
2025

FreqPrior: Improving Video Diffusion Models with Frequency Filtering Gaussian Noise

ICLR 2025poster

Text-driven video generation has advanced significantly due to developments in diffusion models. Beyond the training and sampling phases, recent studies have investigated noise priors of diffusion models, as improved noise priors yield better generation results. One recent approach employs the Fouri…

Cited by 0SourcePDFScholar
2025

HiRes-LLaVA: Restoring Fragmentation Input in High-Resolution Large Vision-Language Models

CVPR 2025poster

High-resolution image inputs allow Large Vision-Language Models (LVLMs) to capture finer visual details, improving comprehension. However, the increased training and computational costs associated with such inputs pose significant challenges. A common approach to mitigate these costs involves slicin…

Cited by 8SourcePDFScholar
2025

ILLUME: Illuminating Your LLMs to See, Draw, and Self-Enhance

ICCV 2025poster

In this paper, we introduce ILLUME, a unified multimodal large language model (MLLM) that seamlessly integrates multimodal understanding and generation capabilities within a single large language model through a unified next-token prediction formulation.To address the large dataset size typically re…

Cited by 0SourcePDFScholar
2025

Towards Unified Multimodal Interleaved Generation via Group Relative Policy Optimization

NeurIPS 2025poster

Unified vision-language models have made significant progress in multimodal understanding and generation, yet they largely fall short in producing multimodal interleaved outputs, which is a crucial capability for tasks like visual storytelling and step-by-step visual reasoning. In this work, we prop…

Cited by 0SourceScholar
2024

Gaining Wisdom from Setbacks: Aligning Large Language Models via Mistake Analysis

ICLR 2024poster

The rapid development of large language models (LLMs) has not only provided numerous opportunities but also presented significant challenges. This becomes particularly evident when LLMs inadvertently generate harmful or toxic content, either unintentionally or because of intentional inducement. Exis…

Cited by 36SourcePDFScholar
2024

Reason2Drive: Towards Interpretable and Chain-based Reasoning for Autonomous Driving

ECCV 2024poster

"Large vision-language models (VLMs) have garnered increasing interest in autonomous driving areas, due to their advanced capabilities in complex reasoning tasks essential for highly autonomous vehicle behavior. Despite their potential, research in autonomous systems is hindered by the lack of datas…

2024

SlowFocus: Enhancing Fine-grained Temporal Understanding in Video LLM

NeurIPS 2024poster

Large language models (LLMs) have demonstrated exceptional capabilities in text understanding, which has paved the way for their expansion into video LLMs (Vid-LLMs) to analyze video data. However, current Vid-LLMs struggle to simultaneously retain high-quality frame-level semantic information (i.e.…

Cited by 2SourcePDFScholar
2024

UNIT: Unifying Image and Text Recognition in One Vision Encoder

NeurIPS 2024poster

Currently, vision encoder models like Vision Transformers (ViTs) typically excel at image recognition tasks but cannot simultaneously support text recognition like human visual recognition. To address this limitation, we propose UNIT, a novel training framework aimed at UNifying Image and Text recog…

Cited by 3SourcePDFScholar
2023

PARTNER: Level up the Polar Representation for LiDAR 3D Object Detection

ICCV 2023poster

Recently, polar-based representation has shown promising properties in perceptual tasks. In addition to Cartesian-based approaches, which separate point clouds unevenly, representing point clouds as polar grids has been recognized as an alternative due to (1) its advantage in robust performance unde…

Cited by 10PDFcodeScholar
2022

LIFT: Learning 4D LiDAR Image Fusion Transformer for 3D Object Detection

CVPR 2022poster

LiDAR and camera are two common sensors to collect data in time for 3D object detection under the autonomous driving context. Though the complementary information across sensors and time has great potential of benefiting 3D perception, taking full advantage of sequential cross-sensor data still rema…

Cited by 37PDFScholar
2021

Learning Transferable Features for Point Cloud Detection via 3D Contrastive Co-training

NeurIPS 2021poster

Most existing point cloud detection models require large-scale, densely annotated datasets. They typically underperform in domain adaptation settings, due to geometry shifts caused by different physical environments or LiDAR sensor configurations. Therefore, it is challenging but valuable to learn t…

Cited by 34SourcePDFScholar