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Zero-shot learning (ZSL) aims to recognize unseen objects (test classes) given some other seen objects (training classes), by sharing information of attributes between different objects. Attributes are artificially annotated for objects and…

Computer Vision and Pattern Recognition · Computer Science 2019-10-29 Xiaofeng Xu , Ivor W. Tsang , Chuancai Liu

Signal recognition is one of significant and challenging tasks in the signal processing and communications field. It is often a common situation that there's no training data accessible for some signal classes to perform a recognition task.…

Machine Learning · Computer Science 2021-05-12 Yihong Dong , Xiaohan Jiang , Huaji Zhou , Yun Lin , Qingjiang Shi

Free-hand sketch-based image retrieval (SBIR) is a specific cross-view retrieval task, in which queries are abstract and ambiguous sketches while the retrieval database is formed with natural images. Work in this area mainly focuses on…

Computer Vision and Pattern Recognition · Computer Science 2017-03-17 Li Liu , Fumin Shen , Yuming Shen , Xianglong Liu , Ling Shao

Zero-shot learning (ZSL) is commonly used to address the very pervasive problem of predicting unseen classes in fine-grained image classification and other tasks. One family of solutions is to learn synthesised unseen visual samples…

Computer Vision and Pattern Recognition · Computer Science 2020-08-10 Zhi Chen , Sen Wang , Jingjing Li , Zi Huang

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

Collecting training images for all visual categories is not only expensive but also impractical. Zero-shot learning (ZSL), especially using attributes, offers a pragmatic solution to this problem. However, at test time most attribute-based…

Computer Vision and Pattern Recognition · Computer Science 2016-10-18 Ziad Al-Halah , Makarand Tapaswi , Rainer Stiefelhagen

Zero-shot detection (ZSD) is a challenging task where we aim to recognize and localize objects simultaneously, even when our model has not been trained with visual samples of a few target ("unseen") classes. Recently, methods employing…

Computer Vision and Pattern Recognition · Computer Science 2022-12-13 Sandipan Sarma , Sushil Kumar , Arijit Sur

Zero-Shot Classification (ZSC) equips the learned model with the ability to recognize the visual instances from the novel classes via constructing the interactions between the visual and the semantic modalities. In contrast to the…

Computer Vision and Pattern Recognition · Computer Science 2019-08-27 Zhong Ji , Xuejie Yu , Yunlong Yu , Yanwei Pang , Zhongfei Zhang

Sketch-based image retrieval (SBIR) is the task of retrieving natural images (photos) that match the semantics and the spatial configuration of hand-drawn sketch queries. The universality of sketches extends the scope of possible…

Computer Vision and Pattern Recognition · Computer Science 2022-09-15 Omar Seddati , Stéphane Dupont , Saïd Mahmoudi , Thierry Dutoit

Compared to conventional zero-shot learning (ZSL) where recognising unseen classes is the primary or only aim, the goal of generalized zero-shot learning (GZSL) is to recognise both seen and unseen classes. Most GZSL methods typically learn…

Computer Vision and Pattern Recognition · Computer Science 2021-01-12 Zhi Chen , Zi Huang , Jingjing Li , Zheng Zhang

Generalized Zero-Shot Learning (GZSL) is a challenging topic that has promising prospects in many realistic scenarios. Using a gating mechanism that discriminates the unseen samples from the seen samples can decompose the GZSL problem to a…

Computer Vision and Pattern Recognition · Computer Science 2022-01-04 Xingyu Chen , Xuguang Lan , Fuchun Sun , Nanning Zheng

Zero-shot learning (ZSL) aims to train a model on seen classes and recognize unseen classes by knowledge transfer through shared auxiliary information. Recent studies reveal that documents from encyclopedias provide helpful auxiliary…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Xiangyan Qu , Jing Yu , Jiamin Zhuang , Gaopeng Gou , Gang Xiong , Qi Wu

Zero-Shot Learning (ZSL) presents the challenge of identifying categories not seen during training. This task is crucial in domains where it is costly, prohibited, or simply not feasible to collect training data. ZSL depends on a mapping…

Computer Vision and Pattern Recognition · Computer Science 2025-06-10 William Heyden , Habib Ullah , M. Salman Siddiqui , Fadi Al Machot

Zero-shot learning (ZSL) aims to recognize unseen classes with zero samples by transferring semantic knowledge from seen classes. Current approaches typically correlate global visual features with semantic information (i.e., attributes) or…

Computer Vision and Pattern Recognition · Computer Science 2025-11-12 Ning Wang , Long Yu , Cong Hua , Guangming Zhu , Lin Mei , Syed Afaq Ali Shah , Mohammed Bennamoun , Liang Zhang

Out-of-distribution (OOD) detection has emerged as a popular technique to enhance the reliability of machine learning models by identifying unexpected inputs from unknown classes. Recent progress in pre-trained vision-language models (VLMs)…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Yuanwei Hu , Bo Peng , Yadan Luo , Zhen Fang , Ling Chen , Jie Lu

Generalized Zero-Shot Learning (GZSL) is a challenging task requiring accurate classification of both seen and unseen classes. Within this domain, Audio-visual GZSL emerges as an extremely exciting yet difficult task, given the inclusion of…

Multimedia · Computer Science 2025-09-15 Liuyuan Wen

As sketch research has collectively matured over time, its adaptation for at-mass commercialisation emerges on the immediate horizon. Despite an already mature research endeavour for photos, there is no research on the efficient inference…

Computer Vision and Pattern Recognition · Computer Science 2025-05-30 Aneeshan Sain , Subhajit Maity , Pinaki Nath Chowdhury , Subhadeep Koley , Ayan Kumar Bhunia , Yi-Zhe Song

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 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

Zero-Shot Learning (ZSL) aims to recognize unseen classes by generalizing the knowledge, i.e., visual and semantic relationships, obtained from seen classes, where image augmentation techniques are commonly applied to improve the…

Computer Vision and Pattern Recognition · Computer Science 2023-08-02 Zhi Chen , Pengfei Zhang , Jingjing Li , Sen Wang , Zi Huang