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Deploying machine learning in open environments presents the challenge of encountering diverse test inputs that differ significantly from the training data. These out-of-distribution samples may exhibit shifts in local or global features…

Machine Learning · Computer Science 2024-03-19 Jiawei Li , Sitong Li , Shanshan Wang , Yicheng Zeng , Falong Tan , Chuanlong Xie

Out-of-distribution (OOD) detection has recently gained substantial attention due to the importance of identifying out-of-domain samples in reliability and safety. Although OOD detection methods have advanced by a great deal, they are still…

Computer Vision and Pattern Recognition · Computer Science 2022-10-03 Mohammad Azizmalayeri , Arshia Soltani Moakhar , Arman Zarei , Reihaneh Zohrabi , Mohammad Taghi Manzuri , Mohammad Hossein Rohban

The Zero-Shot Learning (ZSL) task attempts to learn concepts without any labeled data. Unlike traditional classification/detection tasks, the evaluation environment is provided unseen classes never encountered during training. As such, it…

Computer Vision and Pattern Recognition · Computer Science 2022-11-18 Abhijit Suprem

Out-of-distribution (OoD) detection is a natural downstream task for deep generative models, due to their ability to learn the input probability distribution. There are mainly two classes of approaches for OoD detection using deep…

Machine Learning · Computer Science 2019-07-11 Yujia Huang , Sihui Dai , Tan Nguyen , Richard G. Baraniuk , Anima Anandkumar

We introduce a simple yet effective episode-based training framework for zero-shot learning (ZSL), where the learning system requires to recognize unseen classes given only the corresponding class semantics. During training, the model is…

Computer Vision and Pattern Recognition · Computer Science 2020-04-03 Yunlong Yu , Zhong Ji , Zhongfei Zhang , Jungong Han

Out-of-distribution (OOD) detection is important for deploying machine learning models in the real world, where test data from shifted distributions can naturally arise. While a plethora of algorithmic approaches have recently emerged for…

Machine Learning · Computer Science 2021-12-03 Peyman Morteza , Yixuan Li

Generative Zero-Shot Learning approach (GZSL) has demonstrated significant potential in 3D point cloud semantic segmentation tasks. GZSL leverages generative models like GANs or VAEs to synthesize realistic features (real features) of…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Ahed Alboody

The need to address the scarcity of task-specific annotated data has resulted in concerted efforts in recent years for specific settings such as zero-shot learning (ZSL) and domain generalization (DG), to separately address the issues of…

Computer Vision and Pattern Recognition · Computer Science 2021-07-13 Shivam Chandhok , Sanath Narayan , Hisham Cholakkal , Rao Muhammad Anwer , Vineeth N Balasubramanian , Fahad Shahbaz Khan , Ling Shao

Synthesizing pseudo samples is currently the most effective way to solve the Generalized Zero-Shot Learning (GZSL) problem. Most models achieve competitive performance but still suffer from two problems: (1) Feature confounding, the overall…

Computer Vision and Pattern Recognition · Computer Science 2022-08-23 Yaogong Feng , Xiaowen Huang , Pengbo Yang , Jian Yu , Jitao Sang

We present a generative framework for generalized zero-shot learning where the training and test classes are not necessarily disjoint. Built upon a variational autoencoder based architecture, consisting of a probabilistic encoder and a…

Machine Learning · Computer Science 2018-06-13 Vinay Kumar Verma , Gundeep Arora , Ashish Mishra , Piyush Rai

Zero-shot learning (ZSL) has been shown to be a promising approach to generalizing a model to categories unseen during training by leveraging class attributes, but challenges still remain. Recently, methods using generative models to combat…

Computer Vision and Pattern Recognition · Computer Science 2021-02-24 Vinay Kumar Verma , Kevin Liang , Nikhil Mehta , Lawrence Carin

Detecting out-of-distribution (OOD) inputs is pivotal for deploying safe vision systems in open-world environments. We revisit diffusion models, not as generators, but as universal perceptual templates for OOD detection. This research…

Computer Vision and Pattern Recognition · Computer Science 2025-07-31 Lemar Abdi , Amaan Valiuddin , Francisco Caetano , Christiaan Viviers , Fons van der Sommen

We investigate learning feature-to-feature translator networks by alternating back-propagation as a general-purpose solution to zero-shot learning (ZSL) problems. It is a generative model-based ZSL framework. In contrast to models based on…

Computer Vision and Pattern Recognition · Computer Science 2019-11-12 Yizhe Zhu , Jianwen Xie , Bingchen Liu , Ahmed Elgammal

In open-world scenarios, where both novel classes and domains may exist, an ideal segmentation model should detect anomaly classes for safety and generalize to new domains. However, existing methods often struggle to distinguish between…

Computer Vision and Pattern Recognition · Computer Science 2024-11-07 Zhitong Gao , Bingnan Li , Mathieu Salzmann , Xuming He

Zero-Shot Learning (ZSL) is an emerging research that aims to solve the classification problems with very few training data. The present works on ZSL mainly focus on the mapping of learning semantic space to visual space. It encounters many…

Computer Vision and Pattern Recognition · Computer Science 2021-03-01 Zeng Ting , Xiang Hongxin , Xie Cheng , Yang Yun , Liu Qing

Out-of-distribution (OOD) detection is crucial in many real-world applications. However, intelligent models are often trained solely on in-distribution (ID) data, leading to overconfidence when misclassifying OOD data as ID classes. In this…

Computer Vision and Pattern Recognition · Computer Science 2024-12-10 Jiankang Chen , Tong Zhang , Wei-Shi Zheng , Ruixuan Wang

Zero-shot learning (ZSL) aims to recognize classes that do not have samples in the training set. One representative solution is to directly learn an embedding function associating visual features with corresponding class semantics for…

Computer Vision and Pattern Recognition · Computer Science 2023-07-19 Yu Du , Miaojing Shi , Fangyun Wei , Guoqi Li

Zero-shot learning(ZSL) aims to recognize new classes without prior exposure to their samples, relying on semantic knowledge from observed classes. However, current attention-based models may overlook the transferability of visual features…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Yu Lei , Guoshuai Sheng , Fangfang Li , Quanxue Gao , Cheng Deng , Qin Li

Out-of-distribution (OOD) detection has seen significant advancements with zero-shot approaches by leveraging the powerful Vision-Language Models (VLMs) such as CLIP. However, prior research works have predominantly focused on enhancing…

Computer Vision and Pattern Recognition · Computer Science 2025-01-10 Pei-Kang Lee , Jun-Cheng Chen , Ja-Ling Wu

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