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Zero-shot Learning (ZSL) enables classifiers to recognize classes unseen during training, commonly via generative two stage methods: (1) learn visual semantic correlations from seen classes; (2) synthesize unseen class features from…

Computer Vision and Pattern Recognition · Computer Science 2026-02-16 Zihan Ye , Shreyank N Gowda , Kaile Du , Weijian Luo , Ling Shao

Out-of-distribution detection (OOD) is a pivotal task for real-world applications that trains models to identify samples that are distributionally different from the in-distribution (ID) data during testing. Recent advances in AI,…

Computer Vision and Pattern Recognition · Computer Science 2025-05-06 Chaohua Li , Enhao Zhang , Chuanxing Geng , Songcan Chen

Zero-shot learning (ZSL) aims to recognize unseen object classes without any training samples, which can be regarded as a form of transfer learning from seen classes to unseen ones. This is made possible by learning a projection between a…

Computer Vision and Pattern Recognition · Computer Science 2018-10-22 An Zhao , Mingyu Ding , Jiechao Guan , Zhiwu Lu , Tao Xiang , Ji-Rong Wen

Robust object recognition systems usually rely on powerful feature extraction mechanisms from a large number of real images. However, in many realistic applications, collecting sufficient images for ever-growing new classes is unattainable.…

Computer Vision and Pattern Recognition · Computer Science 2017-05-05 Yang Long , Li Liu , Ling Shao , Fumin Shen , Guiguang Ding , Jungong Han

Zero-shot learning (ZSL) is concerned with the recognition of previously unseen classes. It relies on additional semantic knowledge for which a mapping can be learned with training examples of seen classes. While classical ZSL considers the…

Machine Learning · Computer Science 2019-01-16 Yannick Le Cacheux , Hervé Le Borgne , Michel Crucianu

In generalized zero shot learning (GZSL), the set of classes are split into seen and unseen classes, where training relies on the semantic features of the seen and unseen classes and the visual representations of only the seen classes,…

Computer Vision and Pattern Recognition · Computer Science 2018-08-03 Rafael Felix , B. G. Vijay Kumar , Ian Reid , Gustavo Carneiro

Zero-shot learning (ZSL) aims to recognize a set of unseen classes without any training images. The standard approach to ZSL requires a set of training images annotated with seen class labels and a semantic descriptor for seen/unseen…

Computer Vision and Pattern Recognition · Computer Science 2019-03-19 Nanyi Fei , Jiechao Guan , Zhiwu Lu , Tao Xiang , Ji-Rong Wen

This paper presents a method of zero-shot learning (ZSL) which poses ZSL as the missing data problem, rather than the missing label problem. Specifically, most existing ZSL methods focus on learning mapping functions from the image feature…

Computer Vision and Pattern Recognition · Computer Science 2021-03-09 Bo Zhao , Botong Wu , Tianfu Wu , Yizhou Wang

Attribute-based Zero-Shot Learning (ZSL) has revolutionized the ability of models to recognize new classes not seen during training. However, with the advancement of large-scale models, the expectations have risen. Beyond merely achieving…

Computer Vision and Pattern Recognition · Computer Science 2024-05-14 Dubing Chen , Chenyi Jiang , Haofeng Zhang

Multimodal fusion, leveraging data like vision and language, is rapidly gaining traction. This enriched data representation improves performance across various tasks. Existing methods for out-of-distribution (OOD) detection, a critical area…

Computer Vision and Pattern Recognition · Computer Science 2024-08-29 Jinglun Li , Xinyu Zhou , Kaixun Jiang , Lingyi Hong , Pinxue Guo , Zhaoyu Chen , Weifeng Ge , Wenqiang Zhang

Zero-shot learning (ZSL) refers to the problem of learning to classify instances from the novel classes (unseen) that are absent in the training set (seen). Most ZSL methods infer the correlation between visual features and attributes to…

Computer Vision and Pattern Recognition · Computer Science 2021-03-04 Zhe Liu , Yun Li , Lina Yao , Xianzhi Wang , Guodong Long

We propose a novel Generalized Zero-Shot learning (GZSL) method that is agnostic to both unseen images and unseen semantic vectors during training. Prior works in this context propose to map high-dimensional visual features to the semantic…

Computer Vision and Pattern Recognition · Computer Science 2019-04-10 Pengkai Zhu , Hanxiao Wang , Venkatesh Saligrama

Generalized zero-shot learning (GZSL) aims to train a model for classifying data samples under the condition that some output classes are unknown during supervised learning. To address this challenging task, GZSL leverages semantic…

Computer Vision and Pattern Recognition · Computer Science 2022-07-18 Farhad Pourpanah , Moloud Abdar , Yuxuan Luo , Xinlei Zhou , Ran Wang , Chee Peng Lim , Xi-Zhao Wang , Q. M. Jonathan Wu

A well trained and generalized deep neural network (DNN) should be robust to both seen and unseen classes. However, the performance of most of the existing supervised DNN algorithms degrade for classes which are unseen in the training set.…

Computer Vision and Pattern Recognition · Computer Science 2020-04-03 Rohit Keshari , Richa Singh , Mayank Vatsa

Zero-Shot Learning (ZSL) aims to recognise unseen object classes, which are not observed during the training phase. The existing body of works on ZSL mostly relies on pretrained visual features and lacks the explicit attribute localisation…

Computer Vision and Pattern Recognition · Computer Science 2021-08-03 Faisal Alamri , Anjan Dutta

Zero-shot learning, the task of learning to recognize new classes not seen during training, has received considerable attention in the case of 2D image classification. However despite the increasing ubiquity of 3D sensors, the corresponding…

Computer Vision and Pattern Recognition · Computer Science 2019-12-24 Ali Cheraghian , Shafin Rahman , Dylan Campbell , Lars Petersson

Detecting out-of-distribution (OOD) samples is crucial for ensuring the safety of machine learning systems and has shaped the field of OOD detection. Meanwhile, several other problems are closely related to OOD detection, including anomaly…

Computer Vision and Pattern Recognition · Computer Science 2025-06-19 Atsuyuki Miyai , Jingkang Yang , Jingyang Zhang , Yifei Ming , Yueqian Lin , Qing Yu , Go Irie , Shafiq Joty , Yixuan Li , Hai Li , Ziwei Liu , Toshihiko Yamasaki , Kiyoharu Aizawa

Generalized zero-shot learning (GZSL) aims to classify samples under the assumption that some classes are not observable during training. To bridge the gap between the seen and unseen classes, most GZSL methods attempt to associate the…

Computer Vision and Pattern Recognition · Computer Science 2021-08-30 Zhi Chen , Yadan Luo , Ruihong Qiu , Sen Wang , Zi Huang , Jingjing Li , Zheng Zhang

In Generalized Zero-Shot Learning (GZSL), we aim to recognize both seen and unseen categories using a model trained only on seen categories. In computer vision, this translates into a classification problem, where knowledge from seen…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 William Heyden , Habib Ullah , M. Salman Siddiqui , Fadi Al Machot

Generalized zero-shot learning (GZSL) aims at training a model that can generalize to unseen class data by only using auxiliary information. One of the main challenges in GZSL is a biased model prediction toward seen classes caused by…

Machine Learning · Computer Science 2022-03-09 Gukyeong Kwon , Ghassan AlRegib