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Adversarial attacks pose a critical security threat to real-world AI systems by injecting human-imperceptible perturbations into benign samples to induce misclassification in deep learning models. While existing detection methods, such as…

Computer Vision and Pattern Recognition · Computer Science 2025-04-02 Yinghe Zhang , Chi Liu , Shuai Zhou , Sheng Shen , Peng Gui

The stunning progress in face manipulation methods has made it possible to synthesize realistic fake face images, which poses potential threats to our society. It is urgent to have face forensics techniques to distinguish those tampered…

Computer Vision and Pattern Recognition · Computer Science 2019-12-13 Jia Li , Tong Shen , Wei Zhang , Hui Ren , Dan Zeng , Tao Mei

With the advent of large-scale pre-trained models, interest in adapting and exploiting them for continual learning scenarios has grown. In this paper, we propose an approach to exploiting pre-trained vision-language models (e.g. CLIP) that…

Computer Vision and Pattern Recognition · Computer Science 2023-11-01 Xialei Liu , Xusheng Cao , Haori Lu , Jia-wen Xiao , Andrew D. Bagdanov , Ming-Ming Cheng

Street-view image attribute classification is a vital downstream task of image classification, enabling applications such as autonomous driving, urban analytics, and high-definition map construction. It remains computationally demanding…

Computer Vision and Pattern Recognition · Computer Science 2026-02-19 Qi You , Yitai Cheng , Zichao Zeng , James Haworth

Data augmentation is crucial for improving the robustness of face detection systems, especially under challenging conditions such as occlusion, illumination variation, and complex environments. Traditional copy paste augmentation often…

Computer Vision and Pattern Recognition · Computer Science 2025-12-15 Qiushi Guo

The aim of this work is to explore the potential of pre-trained vision-language models (VLMs) for universal detection of AI-generated images. We develop a lightweight detection strategy based on CLIP features and study its performance in a…

Computer Vision and Pattern Recognition · Computer Science 2024-04-30 Davide Cozzolino , Giovanni Poggi , Riccardo Corvi , Matthias Nießner , Luisa Verdoliva

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

One of the most pressing challenges for the detection of face-manipulated videos is generalising to forgery methods not seen during training while remaining effective under common corruptions such as compression. In this paper, we examine…

Computer Vision and Pattern Recognition · Computer Science 2022-10-24 Alexandros Haliassos , Rodrigo Mira , Stavros Petridis , Maja Pantic

The rapid advancement of AI-Generated Content (AIGC) technologies poses significant challenges for authenticity assessment. However, existing evaluation protocols largely overlook anti-forensics attack, failing to ensure the comprehensive…

Computer Vision and Pattern Recognition · Computer Science 2026-02-20 Haipeng Li , Rongxuan Peng , Anwei Luo , Shunquan Tan , Changsheng Chen , Anastasia Antsiferova

Contrastive Vision-Language Pre-training, known as CLIP, has provided a new paradigm for learning visual representations by using large-scale contrastive image-text pairs. It shows impressive performance on zero-shot knowledge transfer to…

Computer Vision and Pattern Recognition · Computer Science 2021-11-16 Renrui Zhang , Rongyao Fang , Wei Zhang , Peng Gao , Kunchang Li , Jifeng Dai , Yu Qiao , Hongsheng Li

Contrastive Language-Image Pretraining (CLIP) stands out as a prominent method for image representation learning. Various neural architectures, spanning Transformer-based models like Vision Transformers (ViTs) to Convolutional Networks…

Computer Vision and Pattern Recognition · Computer Science 2023-12-25 Cristian Rodriguez-Opazo , Edison Marrese-Taylor , Ehsan Abbasnejad , Hamed Damirchi , Ignacio M. Jara , Felipe Bravo-Marquez , Anton van den Hengel

Open-set 3D object retrieval (3DOR) is an emerging task aiming to retrieve 3D objects of unseen categories beyond the training set. Existing methods typically utilize all modalities (i.e., voxels, point clouds, multi-view images) and train…

Computer Vision and Pattern Recognition · Computer Science 2025-07-30 Zhichuan Wang , Yang Zhou , Zhe Liu , Rui Yu , Song Bai , Yulong Wang , Xinwei He , Xiang Bai

Federated learning (FL) has emerged as a new paradigm for privacy-preserving computation in recent years. Unfortunately, FL faces two critical challenges that hinder its actual performance: data distribution heterogeneity and high resource…

Machine Learning · Computer Science 2023-07-11 Wang Lu , Xixu Hu , Jindong Wang , Xing Xie

Large pre-trained vision-language models, such as CLIP, have demonstrated state-of-the-art performance across a wide range of image classification tasks, without requiring retraining. Few-shot CLIP is competitive with existing specialized…

Computer Vision and Pattern Recognition · Computer Science 2024-09-06 Dominykas Seputis , Serghei Mihailov , Soham Chatterjee , Zehao Xiao

Few-shot anomaly detection methods can effectively address data collecting difficulty in industrial scenarios. Compared to 2D few-shot anomaly detection (2D-FSAD), 3D few-shot anomaly detection (3D-FSAD) is still an unexplored but essential…

Computer Vision and Pattern Recognition · Computer Science 2024-06-28 Zuo Zuo , Jiahao Dong , Yao Wu , Yanyun Qu , Zongze Wu

Despite the remarkable performance of vision language models (VLMs) such as Contrastive Language Image Pre-training (CLIP), the large size of these models is a considerable obstacle to their use in federated learning (FL) systems where the…

Machine Learning · Computer Science 2025-03-11 Yihang Wu , Ahmad Chaddad , Christian Desrosiers , Tareef Daqqaq , Reem Kateb

Detecting facial forgery images and videos is an increasingly important topic in multimedia forensics. As forgery images and videos are usually compressed into different formats such as JPEG and H264 when circulating on the Internet,…

Computer Vision and Pattern Recognition · Computer Science 2021-05-13 Shenhao Cao , Qin Zou , Xiuqing Mao , Zhongyuan Wang

Recently, large vision and language models have shown their success when adapting them to many downstream tasks. In this paper, we present a unified framework named CLIP-ADA for Anomaly Detection by Adapting a pre-trained CLIP model. To…

Computer Vision and Pattern Recognition · Computer Science 2024-03-15 Yuxuan Cai , Xinwei He , Dingkang Liang , Ao Tong , Xiang Bai

Contrastive Vision-Language Pre-training, known as CLIP, has provided a new paradigm for learning visual representations using large-scale image-text pairs. It shows impressive performance on downstream tasks by zero-shot knowledge…

Computer Vision and Pattern Recognition · Computer Science 2022-07-21 Renrui Zhang , Zhang Wei , Rongyao Fang , Peng Gao , Kunchang Li , Jifeng Dai , Yu Qiao , Hongsheng Li

Vision-language models such as CLIP are pretrained on large volumes of internet sourced image and text pairs, and have been shown to sometimes exhibit impressive zero- and low-shot image classification performance. However, due to their…

Computer Vision and Pattern Recognition · Computer Science 2022-10-11 Omiros Pantazis , Gabriel Brostow , Kate Jones , Oisin Mac Aodha