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We present a novel counterfactual framework for both Zero-Shot Learning (ZSL) and Open-Set Recognition (OSR), whose common challenge is generalizing to the unseen-classes by only training on the seen-classes. Our idea stems from the…

Computer Vision and Pattern Recognition · Computer Science 2021-03-02 Zhongqi Yue , Tan Wang , Hanwang Zhang , Qianru Sun , Xian-Sheng Hua

This paper presents a novel data-driven hierarchical approach to open set recognition (OSR) for robust perception in robotics and computer vision, utilizing constrained agglomerative clustering to automatically build a hierarchy of known…

Computer Vision and Pattern Recognition · Computer Science 2024-11-06 Andrew Hannum , Max Conway , Mario Lopez , André Harrison

In this paper, we address an open problem of zero-shot learning. Its principle is based on learning a mapping that associates feature vectors extracted from i.e. images and attribute vectors that describe objects and/or scenes of interest.…

Computer Vision and Pattern Recognition · Computer Science 2018-06-26 Hongguang Zhang , Piotr Koniusz

Global biodiversity is declining at an unprecedented rate, yet little information is known about most species and how their populations are changing. Indeed, some 90% of Earth's species are estimated to be completely unknown. Machine…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Yuyan Chen , Nico Lang , B. Christian Schmidt , Aditya Jain , Yves Basset , Sara Beery , Maxim Larrivée , David Rolnick

Open-set recognition and adversarial defense study two key aspects of deep learning that are vital for real-world deployment. The objective of open-set recognition is to identify samples from open-set classes during testing, while…

Computer Vision and Pattern Recognition · Computer Science 2020-09-03 Rui Shao , Pramuditha Perera , Pong C. Yuen , Vishal M. Patel

Open-set action recognition is to reject unknown human action cases which are out of the distribution of the training set. Existing methods mainly focus on learning better uncertainty scores but dismiss the importance of feature…

Computer Vision and Pattern Recognition · Computer Science 2023-03-29 Jun Cen , Shiwei Zhang , Xiang Wang , Yixuan Pei , Zhiwu Qing , Yingya Zhang , Qifeng Chen

In open set recognition (OSR), almost all existing methods are designed specially for recognizing individual instances, even these instances are collectively coming in batch. Recognizers in decision either reject or categorize them to some…

Machine Learning · Computer Science 2020-03-24 Chuanxing Geng , Songcan Chen

Adversarial attacks have demonstrated the vulnerability of Machine Learning (ML) image classifiers in Synthetic Aperture Radar (SAR) Automatic Target Recognition (ATR) systems. An adversarial attack can deceive the classifier into making…

Computer Vision and Pattern Recognition · Computer Science 2024-03-28 Tian Ye , Rajgopal Kannan , Viktor Prasanna , Carl Busart

Benefiting from a relatively larger aperture's angle, and in combination with a wide transmitting bandwidth, near-field synthetic aperture radar (SAR) provides a high-resolution image of a target's scattering distribution-hot spots.…

Image and Video Processing · Electrical Eng. & Systems 2022-11-29 Xu Zhan , Xiaoling Zhang , Wensi Zhang , Jun Shi , Shunjun Wei , Tianjiao Zeng

Classifying patterns of known classes and rejecting ambiguous and novel (also called as out-of-distribution (OOD)) inputs are involved in open world pattern recognition. Deep neural network models usually excel in closed-set classification…

Computer Vision and Pattern Recognition · Computer Science 2024-08-06 Zhen Cheng , Xu-Yao Zhang , Cheng-Lin Liu

This paper considers open-set recognition (OSR) of plankton images. Plankton include a diverse range of microscopic aquatic organisms that have an important role in marine ecosystems as primary producers and as a base of food webs. Given…

Computer Vision and Pattern Recognition · Computer Science 2025-03-17 Joona Kareinen , Annaliina Skyttä , Tuomas Eerola , Kaisa Kraft , Lasse Lensu , Sanna Suikkanen , Maiju Lehtiniemi , Heikki Kälviäinen

Open-set domain generalization (OSDG) tackles the dual challenge of recognizing unknown classes while simultaneously striving to generalize across unseen domains without using target data during training. In this article, an OSDG framework…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 Amirreza Khoshbakht , Erchan Aptoula

In this work, we aim to address the challenging task of open set recognition (OSR). Many recent OSR methods rely on auto-encoders to extract class-specific features by a reconstruction strategy, requiring the network to restore the input…

Computer Vision and Pattern Recognition · Computer Science 2021-08-09 Xin Sun , Henghui Ding , Chi Zhang , Guosheng Lin , Keck-Voon Ling

Open-set supervised anomaly detection (OSAD) - a recently emerging anomaly detection area - aims at utilizing a few samples of anomaly classes seen during training to detect unseen anomalies (i.e., samples from open-set anomaly classes),…

Computer Vision and Pattern Recognition · Computer Science 2024-03-19 Jiawen Zhu , Choubo Ding , Yu Tian , Guansong Pang

Despite the remarkable progress in synthetic aperture radar automatic target recognition (SAR ATR), recent efforts have concentrated on detecting and classifying a specific category, e.g., vehicles, ships, airplanes, or buildings. One of…

Computer Vision and Pattern Recognition · Computer Science 2025-01-23 Weijie Li , Wei Yang , Yuenan Hou , Li Liu , Yongxiang Liu , Xiang Li

Zero-shot recognition (ZSR) deals with the problem of predicting class labels for target domain instances based on source domain side information (e.g. attributes) of unseen classes. We formulate ZSR as a binary prediction problem. Our…

Computer Vision and Pattern Recognition · Computer Science 2016-08-22 Ziming Zhang , Venkatesh Saligrama

The acquisition of high-quality labeled synthetic aperture radar (SAR) data is challenging due to the demanding requirement for expert knowledge. Consequently, the presence of unreliable noisy labels is unavoidable, which results in…

Computer Vision and Pattern Recognition · Computer Science 2025-08-12 Yimin Fu , Zhunga Liu , Dongxiu Guo , Longfei Wang

This paper proposes rollable latent space (RLS) for an azimuth invariant synthetic aperture radar (SAR) target recognition. Scarce labeled data and limited viewing direction are critical issues in SAR target recognition.The RLS is a…

Computer Vision and Pattern Recognition · Computer Science 2018-04-23 Kazutoshi Sagi , Takahiro Toizumi , Yuzo Senda

The existing Zero-Shot learning (ZSL) methods may suffer from the vague class attributes that are highly overlapped for different classes. Unlike these methods that ignore the discrimination among classes, in this paper, we propose to…

Computer Vision and Pattern Recognition · Computer Science 2019-04-22 Zihan Ye , Fan Lyu , Linyan Li , Qiming Fu , Jinchang Ren , Fuyuan Hu

Open-set semi-supervised learning (OSSL) embodies a practical scenario within semi-supervised learning, wherein the unlabeled training set encompasses classes absent from the labeled set. Many existing OSSL methods assume that these…

Machine Learning · Computer Science 2023-12-04 Erik Wallin , Lennart Svensson , Fredrik Kahl , Lars Hammarstrand