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Recently, the rise of large-scale vision-language pretrained models like CLIP, coupled with the technology of Parameter-Efficient FineTuning (PEFT), has captured substantial attraction in video action recognition. Nevertheless, prevailing…

Computer Vision and Pattern Recognition · Computer Science 2024-01-23 Mengmeng Wang , Jiazheng Xing , Boyuan Jiang , Jun Chen , Jianbiao Mei , Xingxing Zuo , Guang Dai , Jingdong Wang , Yong Liu

Large-scale vision-language pre-trained (VLP) models (e.g., CLIP) are renowned for their versatility, as they can be applied to diverse applications in a zero-shot setup. However, when these models are used in specific domains, their…

Computer Vision and Pattern Recognition · Computer Science 2024-10-11 Anh-Quan Cao , Maximilian Jaritz , Matthieu Guillaumin , Raoul de Charette , Loris Bazzani

Despite significant results achieved by Contrastive Language-Image Pretraining (CLIP) in zero-shot image recognition, limited effort has been made exploring its potential for zero-shot video recognition. This paper presents Open-VCLIP++, a…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Zuxuan Wu , Zejia Weng , Wujian Peng , Xitong Yang , Ang Li , Larry S. Davis , Yu-Gang Jiang

Contrastive Language-Image Pretraining (CLIP) has achieved remarkable success, leading to rapid advancements in multimodal studies. However, CLIP faces a notable challenge in terms of inefficient data utilization. It relies on a single…

Computer Vision and Pattern Recognition · Computer Science 2024-06-05 Yu Zhang , Qi Zhang , Zixuan Gong , Yiwei Shi , Yepeng Liu , Duoqian Miao , Yang Liu , Ke Liu , Kun Yi , Wei Fan , Liang Hu , Changwei Wang

In the field of medical decision-making, precise anomaly detection in medical imaging plays a pivotal role in aiding clinicians. However, previous work is reliant on large-scale datasets for training anomaly detection models, which…

Computer Vision and Pattern Recognition · Computer Science 2024-05-21 Ximiao Zhang , Min Xu , Dehui Qiu , Ruixin Yan , Ning Lang , Xiuzhuang Zhou

Visual Grounding (VG) is a crucial topic in the field of vision and language, which involves locating a specific region described by expressions within an image. To reduce the reliance on manually labeled data, unsupervised visual grounding…

Computer Vision and Pattern Recognition · Computer Science 2024-11-20 Linhui Xiao , Xiaoshan Yang , Fang Peng , Ming Yan , Yaowei Wang , Changsheng Xu

Video anomaly detection (VAD) aims to detect anomalies that deviate from what is expected. In open-world scenarios, the expected events may change as requirements change. For example, not wearing a mask may be considered abnormal during a…

Computer Vision and Pattern Recognition · Computer Science 2026-03-04 Zihao Liu , Xiaoyu Wu , Jianqin Wu , Xuxu Wang , Linlin Yang

Video anomaly detection (VAD) aims to identify unexpected events in videos and has wide applications in safety-critical domains. While semi-supervised methods trained on only normal samples have gained traction, they often suffer from high…

Computer Vision and Pattern Recognition · Computer Science 2025-04-15 Zongcan Ding , Haodong Zhang , Peng Wu , Guansong Pang , Zhiwei Yang , Peng Wang , Yanning Zhang

This paper presents DetCLIPv2, an efficient and scalable training framework that incorporates large-scale image-text pairs to achieve open-vocabulary object detection (OVD). Unlike previous OVD frameworks that typically rely on a…

Computer Vision and Pattern Recognition · Computer Science 2023-04-11 Lewei Yao , Jianhua Han , Xiaodan Liang , Dan Xu , Wei Zhang , Zhenguo Li , Hang Xu

As a general-purpose vision-language pretraining model, CLIP demonstrates strong generalization ability in image-text alignment tasks and has been widely adopted in downstream applications such as image classification and image-text…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Kuanrong Liu , Siyuan Liang , Cheng Qian , Ming Zhang , Xiaochun Cao

Recently, large-scale pre-trained vision-language models (e.g., CLIP), have garnered significant attention thanks to their powerful representative capabilities. This inspires researchers in transferring the knowledge from these large…

Computer Vision and Pattern Recognition · Computer Science 2025-06-13 Bin Wang , Wentong Li , Wenqian Wang , Mingliang Gao , Runmin Cong , Wei Zhang

Pre-trained vision-language models (VLMs) have enabled significant progress in open vocabulary computer vision tasks such as image classification, object detection and image segmentation. Some recent works have focused on extending VLMs to…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 Rohit Gupta , Mamshad Nayeem Rizve , Jayakrishnan Unnikrishnan , Ashish Tawari , Son Tran , Mubarak Shah , Benjamin Yao , Trishul Chilimbi

Weakly supervised video anomaly detection (WS-VAD) is to distinguish anomalies from normal events based on discriminative representations. Most existing works are limited in insufficient video representations. In this work, we develop a…

Computer Vision and Pattern Recognition · Computer Science 2021-04-06 Jia-Chang Feng , Fa-Ting Hong , Wei-Shi Zheng

Accurately estimating the normalization term (also known as the partition function) in the contrastive loss is a central challenge for training Contrastive Language-Image Pre-training (CLIP) models. Conventional methods rely on large…

Machine Learning · Computer Science 2026-03-05 Xiyuan Wei , Chih-Jen Lin , Tianbao Yang

Contrastive Language-Image Pre-training (CLIP) excels in multimodal tasks such as image-text retrieval and zero-shot classification but struggles with fine-grained understanding due to its focus on coarse-grained short captions. To address…

Computer Vision and Pattern Recognition · Computer Science 2025-05-22 Chunyu Xie , Bin Wang , Fanjing Kong , Jincheng Li , Dawei Liang , Gengshen Zhang , Dawei Leng , Yuhui Yin

Despite the recent success of image-text contrastive models like CLIP and SigLIP, these models often struggle with vision-centric tasks that demand high-fidelity image understanding, such as counting, depth estimation, and fine-grained…

Computer Vision and Pattern Recognition · Computer Science 2025-04-09 Zineng Tang , Long Lian , Seun Eisape , XuDong Wang , Roei Herzig , Adam Yala , Alane Suhr , Trevor Darrell , David M. Chan

CLIP has demonstrated strong generalization in visual domains through natural language supervision, even for video action recognition. However, most existing approaches that adapt CLIP for action recognition have primarily focused on…

Computer Vision and Pattern Recognition · Computer Science 2026-04-27 Hyo Jin Jon , Longbin Jin , Eun Yi Kim

CLIP (Contrastive Language-Image Pre-training) uses contrastive learning from noise image-text pairs to excel at recognizing a wide array of candidates, yet its focus on broad associations hinders the precision in distinguishing subtle…

Computer Vision and Pattern Recognition · Computer Science 2026-05-18 Ziyu Liu , Zeyi Sun , Yuhang Zang , Wei Li , Pan Zhang , Xiaoyi Dong , Yuanjun Xiong , Dahua Lin , Jiaqi Wang

Contrastive Language-Image Pre-training (CLIP) has become a promising language-supervised visual pre-training framework. This paper aims to distill small CLIP models supervised by a large teacher CLIP model. We propose several distillation…

Computer Vision and Pattern Recognition · Computer Science 2024-05-08 Chuanguang Yang , Zhulin An , Libo Huang , Junyu Bi , Xinqiang Yu , Han Yang , Boyu Diao , Yongjun Xu

Recent advancements in pre-trained vision-language models like CLIP have enabled the task of open-vocabulary segmentation. CLIP demonstrates impressive zero-shot capabilities in various downstream tasks that require holistic image…

Computer Vision and Pattern Recognition · Computer Science 2026-03-27 Sule Bai , Yong Liu , Yifei Han , Haoji Zhang , Yansong Tang , Jie Zhou , Jiwen Lu