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In this paper, we introduce SemHiTok, a unified image Tokenizer via Semantic-Guided Hierarchical codebook that provides consistent discrete representations for multimodal understanding and generation. Recently, unified image tokenizers have…

Computer Vision and Pattern Recognition · Computer Science 2026-03-03 Zisheng Chen , Chunwei Wang , Runhui Huang , Hongbin Xu , Xiuwei Chen , Jun Zhou , Jianhua Han , Hang Xu , Xiaodan Liang

Foundation models for 3D vision have recently demonstrated remarkable capabilities in 3D perception. However, scaling these models to long-sequence image inputs remains a significant challenge due to inference-time inefficiency. In this…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 You Shen , Zhipeng Zhang , Yansong Qu , Xiawu Zheng , Jiayi Ji , Shengchuan Zhang , Liujuan Cao

Material classification has emerged as a critical task in computer vision and graphics, supporting the assignment of accurate material properties to a wide range of digital and real-world applications. While traditionally framed as an image…

Computer Vision and Pattern Recognition · Computer Science 2026-03-19 Qingran Lin , Fengwei Yang , Chaolun Zhu

Unifying multimodal understanding, generation and reconstruction representation in a single tokenizer remains a key challenge in building unified models. Previous research predominantly attempts to address this in a dual encoder paradigm,…

Computer Vision and Pattern Recognition · Computer Science 2025-12-01 Sinan Du , Jiahao Guo , Bo Li , Shuhao Cui , Zhengzhuo Xu , Yifu Luo , Yongxian Wei , Kun Gai , Xinggang Wang , Kai Wu , Chun Yuan

The rapid development of generative models has made it increasingly crucial to develop detectors that can reliably detect synthetic images. Although most of the work has now focused on cross-generator generalization, we argue that this…

Computer Vision and Pattern Recognition · Computer Science 2025-10-08 Amirtaha Amanzadi , Zahra Dehghanian , Hamid Beigy , Hamid R. Rabiee

AI-generated images are becoming increasingly realistic and diverse, posing significant challenges for generalizable detection. While Vision Foundation Models (VFMs) provide rich semantic representations and frequency-based methods capture…

Computer Vision and Pattern Recognition · Computer Science 2026-05-01 Shuchang Zhou , Shangkun Wu , Jiwei Wei , Ke Liu , Ran Ran , Caiyan Qin , Yang Yang

Knowledge distillation (KD) has been widely applied in semantic segmentation to compress large models, but conventional approaches primarily preserve in-domain accuracy while neglecting out-of-domain generalization, which is essential under…

Computer Vision and Pattern Recognition · Computer Science 2026-03-04 Chonghua Lv , Dong Zhao , Shuang Wang , Dou Quan , Ning Huyan , Nicu Sebe , Zhun Zhong

Autoregressive (AR) models have recently shown strong performance in image generation, where a critical component is the visual tokenizer (VT) that maps continuous pixel inputs to discrete token sequences. The quality of the VT largely…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Huawei Lin , Tong Geng , Zhaozhuo Xu , Weijie Zhao

Large Vision Language Models (VLMs) effectively bridge the modality gap through extensive pretraining, acquiring sophisticated visual representations aligned with language. However, it remains underexplored whether these representations,…

Computer Vision and Pattern Recognition · Computer Science 2025-12-01 Jiahao Guo , Sinan Du , Jingfeng Yao , Wenyu Liu , Bo Li , Haoxiang Cao , Kun Gai , Chun Yuan , Kai Wu , Xinggang Wang

Recent advances in Vision-Language Models (VLMs) have enabled unified understanding across text and images, yet equipping these models with robust image generation capabilities remains challenging. Existing approaches often rely on…

Computer Vision and Pattern Recognition · Computer Science 2025-10-09 Xiangyi Chen , Théophane Vallaeys , Maha Elbayad , John Nguyen , Jakob Verbeek

Autoregressive image modeling relies on visual tokenizers to compress images into compact latent representations. We design an end-to-end training pipeline that jointly optimizes reconstruction and generation, enabling direct supervision…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Wenda Chu , Bingliang Zhang , Jiaqi Han , Yizhuo Li , Linjie Yang , Yisong Yue , Qiushan Guo

Semantic segmentation networks trained under full supervision for one type of lidar fail to generalize to unseen lidars without intervention. To reduce the performance gap under domain shifts, a recent trend is to leverage vision foundation…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 Björn Michele , Alexandre Boulch , Gilles Puy , Tuan-Hung Vu , Renaud Marlet , Nicolas Courty

Event cameras offer unique advantages for vision tasks in challenging environments, yet processing asynchronous event streams remains an open challenge. While existing methods rely on specialized architectures or resource-intensive…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Ruihao Xia , Junhong Cai , Luziwei Leng , Liuyi Wang , Chengju Liu , Ran Cheng , Yang Tang , Pan Zhou

Recent advances in latent diffusion models have demonstrated their effectiveness for high-resolution image synthesis. However, the properties of the latent space from tokenizer for better learning and generation of diffusion models remain…

Computer Vision and Pattern Recognition · Computer Science 2025-06-02 Hao Chen , Yujin Han , Fangyi Chen , Xiang Li , Yidong Wang , Jindong Wang , Ze Wang , Zicheng Liu , Difan Zou , Bhiksha Raj

Autoregressive (AR) language models rely on causal tokenization, but extending this paradigm to vision remains non-trivial. Current visual tokenizers either flatten 2D patches into non-causal sequences or enforce heuristic orderings that…

Computer Vision and Pattern Recognition · Computer Science 2026-03-09 Yitong Chen , Zuxuan Wu , Xipeng Qiu , Yu-Gang Jiang

In this work, we investigate the potential of a large language model (LLM) to directly comprehend visual signals without the necessity of fine-tuning on multi-modal datasets. The foundational concept of our method views an image as a…

Computer Vision and Pattern Recognition · Computer Science 2024-03-13 Lei Zhu , Fangyun Wei , Yanye Lu

Active research is currently underway to enhance the efficiency of vision transformers (ViTs). Most studies have focused solely on effective token mixers, overlooking the potential relationship with normalization. To boost diverse feature…

Computer Vision and Pattern Recognition · Computer Science 2024-12-02 Jongseong Bae , Susang Kim , Minsu Cho , Ha Young Kim

Source-Free Object Detection (SFOD) aims to adapt a source-pretrained object detector to a target domain without access to source data. However, existing SFOD methods predominantly rely on internal knowledge from the source model, which…

Computer Vision and Pattern Recognition · Computer Science 2026-01-22 Huizai Yao , Sicheng Zhao , Pengteng Li , Yi Cui , Shuo Lu , Weiyu Guo , Yunfan Lu , Yijie Xu , Hui Xiong

In this paper, we focus on motion discrete tokenization, which converts raw motion into compact discrete tokens--a process proven crucial for efficient motion generation. In this paradigm, increasing the number of tokens is a common…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 Sheng Yan , Yong Wang , Xin Du , Junsong Yuan , Mengyuan Liu

Vision transformers have been widely explored in various vision tasks. Due to heavy computational cost, much interest has aroused for compressing vision transformer dynamically in the aspect of tokens. Current methods mainly pay attention…

Computer Vision and Pattern Recognition · Computer Science 2025-06-09 Fanhu Zeng , Deli Yu , Zhenglun Kong , Hao Tang