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Zero-shot out-of-vocabulary detection (ZS-OOVD) aims to accurately recognize objects of in-vocabulary (IV) categories provided at zero-shot inference, while simultaneously rejecting undefined ones (out-of-vocabulary, OOV) that lack…

Computer Vision and Pattern Recognition · Computer Science 2026-02-02 Binyi Su , Chenghao Huang , Haiyong Chen

Detecting out-of-domain (OOD) intents from user queries is essential for a task-oriented dialogue system. Previous OOD detection studies generally work on the assumption that plenty of labeled IND intents exist. In this paper, we focus on a…

Computation and Language · Computer Science 2024-02-23 Pei Wang , Keqing He , Yutao Mou , Xiaoshuai Song , Yanan Wu , Jingang Wang , Yunsen Xian , Xunliang Cai , Weiran Xu

Open-vocabulary detection (OVD) aims to detect novel objects without instance-level annotations to achieve open-world object detection at a lower cost. Existing OVD methods mainly rely on the powerful open-vocabulary image-text alignment…

Computer Vision and Pattern Recognition · Computer Science 2024-10-10 Zishuo Wang , Wenhao Zhou , Jinglin Xu , Yuxin Peng

Out-of-distribution (OOD) detection is crucial for the safe deployment of neural networks. Existing CLIP-based approaches perform OOD detection by devising novel scoring functions or sophisticated fine-tuning methods. In this work, we…

Computation and Language · Computer Science 2024-11-06 Yixia Li , Boya Xiong , Guanhua Chen , Yun Chen

CLIP is a widely used foundational vision-language model that is used for zero-shot image recognition and other image-text alignment tasks. We demonstrate that CLIP is vulnerable to change in image quality under compression. This surprising…

Computer Vision and Pattern Recognition · Computer Science 2023-11-27 Cangxiong Chen , Vinay P. Namboodiri , Julian Padget

Applying machine learning to increasingly high-dimensional problems with sparse or biased training data increases the risk that a model is used on inputs outside its training domain. For such out-of-distribution (OOD) inputs, the model can…

Machine Learning · Computer Science 2025-03-10 Juniper Tyree , Andreas Rupp , Petri S. Clusius , Michael H. Boy

Inspired by the success of vision-language methods (VLMs) in zero-shot classification, recent works attempt to extend this line of work into object detection by leveraging the localization ability of pre-trained VLMs and generating pseudo…

Computer Vision and Pattern Recognition · Computer Science 2023-08-01 Yanxin Long , Jianhua Han , Runhui Huang , Xu Hang , Yi Zhu , Chunjing Xu , Xiaodan Liang

Zero-shot anomaly detection (ZSAD) requires detecting and localizing anomalies without access to target-class anomaly samples. Mainstream methods rely on vision-language models (VLMs) such as CLIP: they build hand-crafted or learned prompt…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Yanning Hou , Peiyuan Li , Zirui Liu , Yitong Wang , Yanran Ruan , Jianfeng Qiu , Ke Xu

While deep learning demonstrates its strong ability to handle independent and identically distributed (IID) data, it often suffers from out-of-distribution (OoD) generalization, where the test data come from another distribution (w.r.t. the…

Machine Learning · Computer Science 2020-12-18 Haoyue Bai , Rui Sun , Lanqing Hong , Fengwei Zhou , Nanyang Ye , Han-Jia Ye , S. -H. Gary Chan , Zhenguo Li

Out-of-distribution (OOD) detection lies at the heart of robust artificial intelligence (AI), aiming to identify samples from novel distributions beyond the training set. Recent approaches have exploited feature representations as…

Machine Learning · Computer Science 2025-08-06 Tarhib Al Azad , Faizul Rakib Sayem , Shahana Ibrahim

Multimodal pre-trained models, such as CLIP, are popular for zero-shot classification due to their open-vocabulary flexibility and high performance. However, vision-language models, which compute similarity scores between images and class…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Mia Chiquier , Utkarsh Mall , Carl Vondrick

Human action recognition is crucial in computer vision systems. However, in real-world scenarios, human actions often fall outside the distribution of training data, requiring a model to both recognize in-distribution (ID) actions and…

Computer Vision and Pattern Recognition · Computer Science 2024-12-20 Jing Xu , Anqi Zhu , Jingyu Lin , Qiuhong Ke , Cunjian Chen

Anomaly detection identifies departures from expected behavior in safety-critical settings. When target-domain normal data are unavailable, zero-shot anomaly detection (ZSAD) leverages vision-language models (VLMs). However, CLIP's coarse…

Computer Vision and Pattern Recognition · Computer Science 2026-02-26 Alireza Salehi , Ehsan Karami , Sepehr Noey , Sahand Noey , Makoto Yamada , Reshad Hosseini , Mohammad Sabokrou

Out-of-Distribution (OOD) detection is critical for the reliable operation of open-world intelligent systems. Despite the emergence of an increasing number of OOD detection methods, the evaluation inconsistencies present challenges for…

Efforts to connect LiDAR data with text, such as LidarCLIP, have primarily focused on embedding 3D point clouds into CLIP text-image space. However, these approaches rely on 3D point clouds, which present challenges in encoding efficiency…

Computer Vision and Pattern Recognition · Computer Science 2025-02-24 Naor Cohen , Roy Orfaig , Ben-Zion Bobrovsky

Aiming at identifying unexpected inputs from unknown classes, out-of-distribution (OOD) detection has emerged as a pivotal approach to enhancing the reliability of machine learning models. This paper focuses on the burgeoning paradigm of…

Machine Learning · Computer Science 2026-05-25 Bo Peng , Jie Lu , Guangquan Zhang , Zhen Fang

Improving out-of-distribution (OOD) generalization during in-distribution (ID) adaptation is a primary goal of robust fine-tuning of zero-shot models beyond naive fine-tuning. However, despite decent OOD generalization performance from…

Computer Vision and Pattern Recognition · Computer Science 2024-11-08 Changdae Oh , Hyesu Lim , Mijoo Kim , Dongyoon Han , Sangdoo Yun , Jaegul Choo , Alexander Hauptmann , Zhi-Qi Cheng , Kyungwoo Song

Previous OOD detection systems only focus on the semantic gap between ID and OOD samples. Besides the semantic gap, we are faced with two additional gaps: the domain gap between source and target domains, and the class-imbalance gap between…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Xiang Fang , Arvind Easwaran , Blaise Genest , Ponnuthurai Nagaratnam Suganthan

Large Vision Language Models (VLMs), such as CLIP, have significantly contributed to various computer vision tasks, including object recognition and object detection. Their open vocabulary feature enhances their value. However, their…

Computer Vision and Pattern Recognition · Computer Science 2024-04-22 Ali Rasekh , Sepehr Kazemi Ranjbar , Milad Heidari , Wolfgang Nejdl

Zero-shot Learning(ZSL) attains knowledge transfer from seen classes to unseen classes by exploring auxiliary category information, which is a promising yet difficult research topic. In this field, Audio-Visual Generalized Zero-Shot…

Computer Vision and Pattern Recognition · Computer Science 2025-03-31 Yang Liu , Xun Zhang , Jiale Du , Xinbo Gao , Jungong Han
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