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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

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

Compositional zero-shot learning (CZSL) refers to recognizing unseen compositions of known visual primitives, which is an essential ability for artificial intelligence systems to learn and understand the world. While considerable progress…

Computer Vision and Pattern Recognition · Computer Science 2023-05-02 Siteng Huang , Qiyao Wei , Donglin Wang

As we move towards large-scale object detection, it is unrealistic to expect annotated training data, in the form of bounding box annotations around objects, for all object classes at sufficient scale, and so methods capable of unseen…

Computer Vision and Pattern Recognition · Computer Science 2019-03-20 Pengkai Zhu , Hanxiao Wang , Venkatesh Saligrama

In most recent years, zero-shot recognition (ZSR) has gained increasing attention in machine learning and image processing fields. It aims at recognizing unseen class instances with knowledge transferred from seen classes. This is typically…

Computer Vision and Pattern Recognition · Computer Science 2019-04-02 Jingcai Guo , Song Guo

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

Supervised learning requires a sufficient training dataset which includes all label. However, there are cases that some class is not in the training data. Zero-Shot Learning (ZSL) is the task of predicting class that is not in the training…

Machine Learning · Computer Science 2020-07-02 Toshitaka Hayashi , Hamido Fujita

Traditional supervised learning aims to train a classifier in the closed-set world, where training and test samples share the same label space. In this paper, we target a more challenging and realistic setting: open-set learning (OSL),…

Machine Learning · Computer Science 2021-07-01 Zhen Fang , Jie Lu , Anjin Liu , Feng Liu , Guangquan Zhang

Zero-shot learning (ZSL) which aims at predicting classes that have never appeared during the training using external knowledge (a.k.a. side information) has been widely investigated. In this paper we present a literature review towards ZSL…

Artificial Intelligence · Computer Science 2021-05-11 Jiaoyan Chen , Yuxia Geng , Zhuo Chen , Ian Horrocks , Jeff Z. Pan , Huajun Chen

Zero-shot reinforcement learning (RL) has emerged as a setting for developing general agents, capable of solving downstream tasks without additional training or planning at test-time. While conventional RL optimizes policies for fixed…

Machine Learning · Computer Science 2026-03-10 Jacopo Di Ventura , Jan Felix Kleuker , Aske Plaat , Thomas Moerland

Zero shot learning (ZSL) aims to recognize unseen classes by exploiting semantic relationships between seen and unseen classes. Two major problems faced by ZSL algorithms are the hubness problem and the bias towards the seen classes.…

Computer Vision and Pattern Recognition · Computer Science 2019-04-17 Akanksha Paul , Narayanan C. Krishnan , Prateek Munjal

In the problem of generalized zero-shot learning, the datapoints from unknown classes are not available during training. The main challenge for generalized zero-shot learning is the unbalanced data distribution which makes it hard for the…

Computer Vision and Pattern Recognition · Computer Science 2018-11-09 Hongguang Zhang , Piotr Koniusz

Existing open-set recognition (OSR) studies typically assume that each image contains only one class label, with the unknown test set (negative) having a disjoint label space from the known test set (positive), a scenario referred to as…

Computer Vision and Pattern Recognition · Computer Science 2025-01-07 Xu Yin , Fei Pan , Guoyuan An , Yuchi Huo , Zixuan Xie , Sung-Eui Yoon

Open-set image recognition (OSR) aims to both classify known-class samples and identify unknown-class samples in the testing set, which supports robust classifiers in many realistic applications, such as autonomous driving, medical…

Computer Vision and Pattern Recognition · Computer Science 2023-12-27 Jiayin Sun , Qiulei Dong

The recognition of unseen objects from a semantic representation or textual description, usually denoted as zero-shot learning, is more prone to be used in real-world scenarios when compared to traditional object recognition. Nevertheless,…

Computer Vision and Pattern Recognition · Computer Science 2021-10-12 Cristiano Patrício , João Neves

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

The ability to identify whether or not a test sample belongs to one of the semantic classes in a classifier's training set is critical to practical deployment of the model. This task is termed open-set recognition (OSR) and has received…

Computer Vision and Pattern Recognition · Computer Science 2022-04-15 Sagar Vaze , Kai Han , Andrea Vedaldi , Andrew Zisserman

Zero-shot learning (ZSL) aims at recognizing unseen class examples (e.g., images) with knowledge transferred from seen classes. This is typically achieved by exploiting a semantic feature space shared by both seen and unseen classes, e.g.,…

Computer Vision and Pattern Recognition · Computer Science 2021-04-13 Jingcai Guo

In real-world classification tasks, it is difficult to collect training samples from all possible categories of the environment. Therefore, when an instance of an unseen class appears in the prediction stage, a robust classifier should be…

Machine Learning · Computer Science 2017-06-20 Yang Yu , Wei-Yang Qu , Nan Li , Zimin Guo

Existing methods using generative adversarial approaches for Zero-Shot Learning (ZSL) aim to generate realistic visual features from class semantics by a single generative network, which is highly under-constrained. As a result, the…

Computer Vision and Pattern Recognition · Computer Science 2019-09-24 Zhi Chen , Jingjing Li , Yadan Luo , Zi Huang , Yang Yang