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This thesis makes considerable contributions to the realm of machine learning, specifically in the context of open-world scenarios where systems face previously unseen data and contexts. Traditional machine learning models are usually…

Machine Learning · Computer Science 2023-10-11 Yiyou Sun

Open set recognition (OSR) is the problem of classifying the known classes, meanwhile identifying the unknown classes when the collected samples cannot exhaust all the classes. There are many applications for the OSR problem. For instance,…

Machine Learning · Computer Science 2021-05-05 Jingyun Jia , Philip K. Chan

Traditional classifiers are deployed under closed-set setting, with both training and test classes belong to the same set. However, real-world applications probably face the input of unknown categories, and the model will recognize them as…

Computer Vision and Pattern Recognition · Computer Science 2021-03-30 Da-Wei Zhou , Han-Jia Ye , De-Chuan Zhan

Few-Shot Open-Set Recognition (FSOSR) targets a critical real-world challenge, aiming to categorize inputs into known categories, termed closed-set classes, while identifying open-set inputs that fall outside these classes. Although…

Computer Vision and Pattern Recognition · Computer Science 2025-10-01 Byeonggeun Kim , Juntae Lee , Kyuhong Shim , Simyung Chang

Endoscopic image classification plays a pivotal role in medical diagnostics by identifying anatomical landmarks and pathological findings. However, conventional closed-set classification frameworks are inherently limited in open-world…

Computer Vision and Pattern Recognition · Computer Science 2025-06-24 Kasra Moazzami , Seoyoun Son , John Lin , Sun Min Lee , Daniel Son , Hayeon Lee , Jeongho Lee , Seongji Lee

This study investigates an application of a new probabilistic interpretation of a softmax output to Open-Set Recognition (OSR). Softmax is a mechanism wildly used in classification and object recognition. However, a softmax mechanism forces…

Computer Vision and Pattern Recognition · Computer Science 2021-11-01 Tatpong Katanyukul , Pisit Nakjai

Current state-of-the-art Wildlife classification models are trained under the closed world setting. When exposed to unknown classes, they remain overconfident in their predictions. Open-set Recognition (OSR) aims to classify known classes…

Computer Vision and Pattern Recognition · Computer Science 2025-10-21 Jiahao Huo , Mufhumudzi Muthivhi , Terence L. van Zyl , Fredrik Gustafsson

A desirable open world recognition (OWR) system requires performing three tasks: (1) Open set recognition (OSR), i.e., classifying the known (classes seen during training) and rejecting the unknown (unseen$/$novel classes) online; (2)…

Computer Vision and Pattern Recognition · Computer Science 2023-08-15 Fulin Gao , Weimin Zhong , Zhixing Cao , Xin Peng , Zhi Li

In many applications, data is easy to acquire but expensive and time-consuming to label prominent examples include medical imaging and NLP. This disparity has only grown in recent years as our ability to collect data improves. Under these…

Machine Learning · Computer Science 2021-04-07 Jaya Krishna Mandivarapu , Blake Camp , Rolando Estrada

Open-set active learning (OSAL) aims to identify informative samples for annotation when unlabeled data may contain previously unseen classes-a common challenge in safety-critical and open-world scenarios. Existing approaches typically rely…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Chen-Chen Zong , Yu-Qi Chi , Xie-Yang Wang , Yan Cui , Sheng-Jun Huang

The problem of detecting a novel class at run time is known as Open Set Detection & is important for various real-world applications like medical application, autonomous driving, etc. Open Set Detection within context of deep learning…

Computer Vision and Pattern Recognition · Computer Science 2022-11-04 Risheek Garrepalli

This paper proposes a method to use deep neural networks as end-to-end open-set classifiers. It is based on intra-class data splitting. In open-set recognition, only samples from a limited number of known classes are available for training.…

Machine Learning · Computer Science 2019-11-21 Patrick Schlachter , Yiwen Liao , Bin Yang

Open-Set Object Detection (OSOD) has emerged as a contemporary research direction to address the detection of unknown objects. Recently, few works have achieved remarkable performance in the OSOD task by employing contrastive clustering to…

Computer Vision and Pattern Recognition · Computer Science 2024-12-31 Hiran Sarkar , Vishal Chudasama , Naoyuki Onoe , Pankaj Wasnik , Vineeth N Balasubramanian

This paper introduces an innovative approach to open world recognition (OWR), where we leverage knowledge acquired from known objects to address the recognition of previously unseen objects. The traditional method of object modeling relies…

Computer Vision and Pattern Recognition · Computer Science 2024-06-25 Paridhi Singh , Arun Kumar

Open set recognition (OSR) requires the model to classify samples that belong to closed sets while rejecting unknown samples during test. Currently, generative models often perform better than discriminative models in OSR, but recent…

Computer Vision and Pattern Recognition · Computer Science 2024-01-15 Yu Wang , Junxian Mu , Pengfei Zhu , Qinghua Hu

Open-set face recognition describes a scenario where unknown subjects, unseen during the training stage, appear on test time. Not only it requires methods that accurately identify individuals of interest, but also demands approaches that…

Computer Vision and Pattern Recognition · Computer Science 2023-08-25 Rafael Henrique Vareto , William Robson Schwartz

Open set recognition (OSR) requires models to classify known samples while detecting unknown samples for real-world applications. Existing studies show impressive progress using unknown samples from auxiliary datasets to regularize OSR…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Yu Wang , Junxian Mu , Hongzhi Huang , Qilong Wang , Pengfei Zhu , Qinghua Hu

In real-world applications where confidence is key, like autonomous driving, the accurate detection and appropriate handling of classes differing from those used during training are crucial. Despite the proposal of various unknown object…

Computer Vision and Pattern Recognition · Computer Science 2024-11-11 Hejer Ammar , Nikita Kiselov , Guillaume Lapouge , Romaric Audigier

Driven by advancements in deep learning, computer-aided diagnoses have made remarkable progress. However, outside controlled laboratory settings, algorithms may encounter several challenges. In the medical domain, these difficulties often…

Computer Vision and Pattern Recognition · Computer Science 2025-11-12 Arnav Aditya , Nitin Kumar , Saurabh Shigwan

Open-set panoptic segmentation (OPS) problem is a new research direction aiming to perform segmentation for both \known classes and \unknown classes, i.e., the objects ("things") that are never annotated in the training set. The main…

Computer Vision and Pattern Recognition · Computer Science 2022-08-04 Hai-Ming Xu , Hao Chen , Lingqiao Liu , Yufei Yin