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Person re-identification is an important task in video surveillance that aims to associate people across camera views at different locations and time. View variability is always a challenging problem seriously degrading person…

Computer Vision and Pattern Recognition · Computer Science 2019-10-10 Fangyi Liu , Lei Zhang

Facial recognition systems are vulnerable to physical (e.g., printed photos) and digital (e.g., DeepFake) face attacks. Existing methods struggle to simultaneously detect physical and digital attacks due to: 1) significant intra-class…

Computer Vision and Pattern Recognition · Computer Science 2025-04-02 Yongze Li , Ning Li , Ajian Liu , Hui Ma , Liying Yang , Xihong Chen , Zhiyao Liang , Yanyan Liang , Jun Wan , Zhen Lei

Face anti-spoofing (FAS) is indispensable for a face recognition system. Many texture-driven countermeasures were developed against presentation attacks (PAs), but the performance against unseen domains or unseen spoofing types is still…

Computer Vision and Pattern Recognition · Computer Science 2023-06-27 Chih-Jung Chang , Yaw-Chern Lee , Shih-Hsuan Yao , Min-Hung Chen , Chien-Yi Wang , Shang-Hong Lai , Trista Pei-Chun Chen

In this paper, we introduce InstructSAM, a unified and streamlined framework designed for multi-instance segmentation under arbitrary instructions. We formulates instruction-driven instance segmentation as a set-structured query prediction…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Yuqian Yuan , Wentong Li , Zhaocheng Li , Yutong Lin , Juncheng Li , Siliang Tang , Jun Xiao , Yueting Zhuang , Wenqiao Zhang

The scarcity of annotated data has sparked significant interest in unsupervised pre-training methods that leverage medical reports as auxiliary signals for medical visual representation learning. However, existing research overlooks the…

Computer Vision and Pattern Recognition · Computer Science 2024-02-06 Zhe Li , Laurence T. Yang , Bocheng Ren , Xin Nie , Zhangyang Gao , Cheng Tan , Stan Z. Li

Large-scale image-text contrastive pre-training models, such as CLIP, have been demonstrated to effectively learn high-quality multimodal representations. However, there is limited research on learning video-text representations for general…

Computer Vision and Pattern Recognition · Computer Science 2023-05-23 Xingjian He , Sihan Chen , Fan Ma , Zhicheng Huang , Xiaojie Jin , Zikang Liu , Dongmei Fu , Yi Yang , Jing Liu , Jiashi Feng

With recent advances in Multimodal Large Language Models (MLLMs) showing strong visual understanding and reasoning, interest is growing in using them to improve the editing performance of diffusion models. Despite rapid progress, most…

Computer Vision and Pattern Recognition · Computer Science 2025-10-10 Chong Mou , Qichao Sun , Yanze Wu , Pengze Zhang , Xinghui Li , Fulong Ye , Songtao Zhao , Qian He

Vision-language models, such as contrastive language-image pre-training (CLIP), have demonstrated impressive results in natural image domains. However, these models often struggle when applied to specialized domains like remote sensing, and…

Computer Vision and Pattern Recognition · Computer Science 2023-10-26 Sangwoo Mo , Minkyu Kim , Kyungmin Lee , Jinwoo Shin

Contrastive Language-Image Pre-training (CLIP) has demonstrated strong generalization across a wide range of visual tasks by leveraging large-scale English-image pairs. However, its extension to low-resource languages remains limited due to…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Dahyun Chung , Donghyun Shin , Yujin Sung , Seunggi Moon , Jinwoo Jeon , Byung-Jun Lee

Foundation models like CLIP and SAM have advanced computer vision and medical imaging via low-shot transfer learning, aiding CADD with limited data. However, their deployment faces two key challenges. \textit{distribution shift} where…

Computer Vision and Pattern Recognition · Computer Science 2025-07-22 Behraj Khan , Tahir Qasim Syed , Nouman M. Durrani , Bilal Naseem , Shabir Ahmad , Rizwan Qureshi

Contrastive Language-Image Pre-training (CLIP) has drawn increasing attention recently for its transferable visual representation learning. However, due to the semantic gap within datasets, CLIP's pre-trained image-text alignment becomes…

Computer Vision and Pattern Recognition · Computer Science 2023-08-11 Longtian Qiu , Renrui Zhang , Ziyu Guo , Ziyao Zeng , Zilu Guo , Yafeng Li , Guangnan Zhang

The availability of handy multi-modal (i.e., RGB-D) sensors has brought about a surge of face anti-spoofing research. However, the current multi-modal face presentation attack detection (PAD) has two defects: (1) The framework based on…

Computer Vision and Pattern Recognition · Computer Science 2023-05-08 Ajian Liu , Zichang Tan , Zitong Yu , Chenxu Zhao , Jun Wan , Yanyan Liang , Zhen Lei , Du Zhang , Stan Z. Li , Guodong Guo

With diverse presentation attacks emerging continually, generalizable face anti-spoofing (FAS) has drawn growing attention. Most existing methods implement domain generalization (DG) on the complete representations. However, different image…

Computer Vision and Pattern Recognition · Computer Science 2022-03-21 Zhuo Wang , Zezheng Wang , Zitong Yu , Weihong Deng , Jiahong Li , Tingting Gao , Zhongyuan Wang

With the development of deep learning, the field of face anti-spoofing (FAS) has witnessed great progress. FAS is usually considered a classification problem, where each class is assumed to contain a single cluster optimized by softmax…

Computer Vision and Pattern Recognition · Computer Science 2023-05-17 Qinghong Sun , Zhenfei Yin , Yichao Wu , Yuanhan Zhang , Jing Shao

Recent Multimodal Large Language Models (MLLMs) exhibit impressive abilities to perceive images and follow open-ended instructions. The capabilities of MLLMs depend on two crucial factors: the model architecture to facilitate the feature…

Computer Vision and Pattern Recognition · Computer Science 2023-10-03 Tianyu Yu , Jinyi Hu , Yuan Yao , Haoye Zhang , Yue Zhao , Chongyi Wang , Shan Wang , Yinxv Pan , Jiao Xue , Dahai Li , Zhiyuan Liu , Hai-Tao Zheng , Maosong Sun

Video-based facial affect analysis has recently attracted increasing attention owing to its critical role in human-computer interaction. Previous studies mainly focus on developing various deep learning architectures and training them in a…

Computer Vision and Pattern Recognition · Computer Science 2024-10-02 Licai Sun , Zheng Lian , Kexin Wang , Yu He , Mingyu Xu , Haiyang Sun , Bin Liu , Jianhua Tao

While multi-modal Visual Language Models (VLMs) have demonstrated significant success across various domains, the integration of VLMs into recommendation and retrieval systems remains a challenge, due to issues like training objective…

Computer Vision and Pattern Recognition · Computer Science 2026-03-05 Josh Beal , Eric Kim , Jinfeng Rao , Rex Wu , Dmitry Kislyuk , Charles Rosenberg

The choice of input text prompt plays a critical role in the performance of Vision-Language Pretrained (VLP) models such as CLIP. We present APoLLo, a unified multi-modal approach that combines Adapter and Prompt learning for…

Machine Learning · Computer Science 2023-12-05 Sanjoy Chowdhury , Sayan Nag , Dinesh Manocha

Methods based on Contrastive Language-Image Pre-training (CLIP) are nowadays extensively used in support of vision-and-language tasks involving remote sensing data, such as cross-modal retrieval. The adaptation of CLIP to this specific…

Computer Vision and Pattern Recognition · Computer Science 2024-11-01 João Daniel Silva , Joao Magalhaes , Devis Tuia , Bruno Martins

As powerful pre-trained vision-language models (VLMs) like CLIP gain prominence, numerous studies have attempted to combine VLMs for downstream tasks. Among these, prompt learning has been validated as an effective method for adapting to…

Computer Vision and Pattern Recognition · Computer Science 2024-09-19 Yu Du , Tong Niu , Rong Zhao