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Anomaly detection is a complex problem due to the ambiguity in defining anomalies, the diversity of anomaly types (e.g., local and global defect), and the scarcity of training data. As such, it necessitates a comprehensive model capable of…

Computer Vision and Pattern Recognition · Computer Science 2025-11-06 Byeongchan Lee , John Won , Seunghyun Lee , Jinwoo Shin

In this paper, we introduce DetailCLIP: A Detail-Oriented CLIP to address the limitations of contrastive learning-based vision-language models, particularly CLIP, in handling detail-oriented and fine-grained tasks like segmentation. While…

Computer Vision and Pattern Recognition · Computer Science 2025-04-02 Amin Karimi Monsefi , Kishore Prakash Sailaja , Ali Alilooee , Ser-Nam Lim , Rajiv Ramnath

Recent vision language models (VLMs) like CLIP have demonstrated impressive anomaly detection performance under significant distribution shift by utilizing high-level semantic information through text prompts. However, these models often…

Computer Vision and Pattern Recognition · Computer Science 2026-02-12 Nadeem Nazer , Hongkuan Zhou , Lavdim Halilaj , Ylli Sadikaj , Steffen Staab

The success of CLIP-like vision-language models (VLMs) on natural images has inspired medical counterparts, yet existing approaches largely fall into two extremes: specialist models trained on single-domain data, which capture…

Computer Vision and Pattern Recognition · Computer Science 2026-03-19 M. Arda Aydın , Melih B. Yilmaz , Aykut Koç , Tolga Çukur

Anomaly detection without priors of the anomalies is challenging. In the field of unsupervised anomaly detection, traditional auto-encoder (AE) tends to fail based on the assumption that by training only on normal images, the model will not…

Computer Vision and Pattern Recognition · Computer Science 2024-08-15 Yajie Cui , Zhaoxiang Liu , Shiguo Lian

Pre-training image representations from the raw text about images enables zero-shot vision transfer to downstream tasks. Through pre-training on millions of samples collected from the internet, multimodal foundation models, such as CLIP,…

Machine Learning · Computer Science 2024-03-18 Chenguang Wang , Ruoxi Jia , Xin Liu , Dawn Song

3D anomaly detection and localization is of great significance for industrial inspection. Prior 3D anomaly detection and localization methods focus on the setting that the testing data share the same category as the training data which is…

Computer Vision and Pattern Recognition · Computer Science 2024-12-06 Yizhou Wang , Kuan-Chuan Peng , Yun Fu

Time series anomaly detection is a pivotal task in data analysis, yet it poses the challenge of discerning normal and abnormal patterns in label-deficient scenarios. While prior studies have largely employed reconstruction-based approaches,…

Machine Learning · Computer Science 2025-08-05 Zhijie Zhong , Zhiwen Yu , Yiyuan Yang , Weizheng Wang , Kaixiang Yang

Recent advances in contrastive representation learning over paired image-text data have led to models such as CLIP that achieve state-of-the-art performance for zero-shot classification and distributional robustness. Such models typically…

Computer Vision and Pattern Recognition · Computer Science 2022-10-28 Shashank Goel , Hritik Bansal , Sumit Bhatia , Ryan A. Rossi , Vishwa Vinay , Aditya Grover

This study aims to address the problem of multi-domain task incremental learning~(MTIL), which requires that vision-language models~(VLMs) continuously acquire new knowledge while maintaining their inherent zero-shot recognition capability.…

Computer Vision and Pattern Recognition · Computer Science 2025-05-13 Songlin Dong , Chenhao Ding , Jiangyang Li , Jizhou Han , Qiang Wang , Yuhang He , Yihong Gong

VAD is a critical field in machine learning focused on identifying deviations from normal patterns in images, often challenged by the scarcity of anomalous data and the need for unsupervised training. To accelerate research and deployment…

Computer Vision and Pattern Recognition · Computer Science 2025-07-22 Manuel Barusco , Francesco Borsatti , Arianna Stropeni , Davide Dalle Pezze , Gian Antonio Susto

In industrial settings, the accurate detection of anomalies is essential for maintaining product quality and ensuring operational safety. Traditional industrial anomaly detection (IAD) models often struggle with flexibility and…

Computer Vision and Pattern Recognition · Computer Science 2025-01-28 Zhiling Chen , Hanning Chen , Mohsen Imani , Farhad Imani

Contrastive Language-Image Pre-Training (CLIP) has enabled zero-shot classification in radiology, reducing reliance on manual annotations. However, conventional contrastive learning struggles with normal case detection due to its strict…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Junhyun Park , Chanyu Moon , Donghwan Lee , Kyungsu Kim , Minho Hwang

Self-supervised models trained with a contrastive loss such as CLIP have shown to be very powerful in zero-shot classification settings. However, to be used as a zero-shot classifier these models require the user to provide new captions…

Machine Learning · Computer Science 2022-10-31 Bhawesh Kumar , Anil Palepu , Rudraksh Tuwani , Andrew Beam

Unsupervised Anomaly Detection has become a popular method to detect pathologies in medical images as it does not require supervision or labels for training. Most commonly, the anomaly detection model generates a "normal" version of an…

Image and Video Processing · Electrical Eng. & Systems 2023-09-26 Felix Meissen , Johannes Paetzold , Georgios Kaissis , Daniel Rueckert

Generative models have shown a giant leap in synthesizing photo-realistic images with minimal expertise, sparking concerns about the authenticity of online information. This study aims to develop a universal AI-generated image detector…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Zihan Liu , Hanyi Wang , Yaoyu Kang , Shilin Wang

General-purpose foundation models have led to recent breakthroughs in artificial intelligence. In remote sensing, self-supervised learning (SSL) and Masked Image Modeling (MIM) have been adopted to build foundation models. However, these…

Computer Vision and Pattern Recognition · Computer Science 2024-04-17 Fan Liu , Delong Chen , Zhangqingyun Guan , Xiaocong Zhou , Jiale Zhu , Qiaolin Ye , Liyong Fu , Jun Zhou

We address the challenges inherent in sketch-based image retrieval (SBIR) across various settings, including zero-shot SBIR, generalized zero-shot SBIR, and fine-grained zero-shot SBIR, by leveraging the vision-language foundation model…

Computer Vision and Pattern Recognition · Computer Science 2024-07-24 Mainak Singha , Ankit Jha , Divyam Gupta , Pranav Singla , Biplab Banerjee

The rapid development of photo-realistic face generation methods has raised significant concerns in society and academia, highlighting the urgent need for robust and generalizable face forgery detection (FFD) techniques. Although existing…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Yaning Zhang , Tianyi Wang , Zitong Yu , Zan Gao , Linlin Shen , Shengyong Chen

Pre-trained vision-language models, e.g., CLIP, have been successfully applied to zero-shot semantic segmentation. Existing CLIP-based approaches primarily utilize visual features from the last layer to align with text embeddings, while…

Computer Vision and Pattern Recognition · Computer Science 2024-06-07 Yunheng Li , ZhongYu Li , Quansheng Zeng , Qibin Hou , Ming-Ming Cheng