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A novel unsupervised outlier score, which can be embedded into graph based dimensionality reduction techniques, is presented in this work. The score uses the directed nearest neighbor graphs of those techniques. Hence, the same measure of…

机器学习 · 计算机科学 2021-05-06 Jonas Wurst , Alberto Flores Fernández , Michael Botsch , Wolfgang Utschick

3D object detection has been wildly studied in recent years, especially for robot perception systems. However, existing 3D object detection is under a closed-set condition, meaning that the network can only output boxes of trained classes.…

计算机视觉与模式识别 · 计算机科学 2021-12-03 Jun Cen , Peng Yun , Junhao Cai , Michael Yu Wang , Ming Liu

Methodologies for incorporating the uncertainties characteristic of data-driven object detectors into object tracking algorithms are explored. Object tracking methods rely on measurement error models, typically in the form of measurement…

系统与控制 · 电气工程与系统科学 2021-11-04 Anish Muthali , Forrest Laine , Claire Tomlin

Navigation in natural outdoor environments requires a robust and reliable traversability classification method to handle the plethora of situations a robot can encounter. Binary classification algorithms perform well in their native domain…

机器人学 · 计算机科学 2020-01-23 Lorenz Wellhausen , René Ranftl , Marco Hutter

Anomaly detection methods strive to discover patterns that differ from the norm in a semantic way. This goal is ambiguous as a data point differing from the norm by an attribute e.g., age, race or gender, may be considered anomalous by some…

计算机视觉与模式识别 · 计算机科学 2022-07-08 Niv Cohen , Jonathan Kahana , Yedid Hoshen

Visual defect assessment is a form of anomaly detection. This is very relevant in finding faults such as cracks and markings in various surface inspection tasks like pavement and automotive parts. The task involves detection of…

计算机视觉与模式识别 · 计算机科学 2019-05-31 Manpreet Singh Minhas , John Zelek

Open World Object Detection (OWOD), simulating the real dynamic world where knowledge grows continuously, attempts to detect both known and unknown classes and incrementally learn the identified unknown ones. We find that although the only…

计算机视觉与模式识别 · 计算机科学 2022-01-05 Xiaowei Zhao , Xianglong Liu , Yifan Shen , Yixuan Qiao , Yuqing Ma , Duorui Wang

Detecting anomalies in human-related videos is crucial for surveillance applications. Current methods primarily include appearance-based and action-based techniques. Appearance-based methods rely on low-level visual features such as color,…

计算机视觉与模式识别 · 计算机科学 2024-09-06 Chenglizhao Chen , Xinyu Liu , Mengke Song , Luming Li , Xu Yu , Shanchen Pang

Safety on roads is of uttermost importance, especially in the context of autonomous vehicles. A critical need is to detect and communicate disruptive incidents early and effectively. In this paper we propose a system based on an…

计算机视觉与模式识别 · 计算机科学 2022-03-24 Alex Levering , Martin Tomko , Devis Tuia , Kourosh Khoshelham

Training image-based object detectors presents formidable challenges, as it entails not only the complexities of object detection but also the added intricacies of precisely localizing objects within potentially diverse and noisy…

计算机视觉与模式识别 · 计算机科学 2024-02-22 Chandan Kumar , Jansel Herrera-Gerena , John Just , Matthew Darr , Ali Jannesari

Outlier detection is an essential capability in safety-critical applications of supervised visual recognition. Most of the existing methods deliver best results by encouraging standard closed-set models to produce low-confidence predictions…

计算机视觉与模式识别 · 计算机科学 2024-09-10 Anja Delić , Matej Grcić , Siniša Šegvić

Video anomaly detection (VAD) is crucial in scenarios such as surveillance and autonomous driving, where timely detection of unexpected activities is essential. Although existing methods have primarily focused on detecting anomalous objects…

计算机视觉与模式识别 · 计算机科学 2025-06-06 Yuzhi Huang , Chenxin Li , Haitao Zhang , Zixu Lin , Yunlong Lin , Hengyu Liu , Wuyang Li , Xinyu Liu , Jiechao Gao , Yue Huang , Xinghao Ding , Yixuan Yuan

Anomaly detection (AD) in a surveillance scenario is an emerging and challenging field of research. For autonomous vehicles like drones or cars, it is immensely important to distinguish between normal and abnormal states in real-time.…

计算机视觉与模式识别 · 计算机科学 2020-07-15 Sayeed Shafayet Chowdhury , Kazi Mejbaul Islam , Rouhan Noor

Over the past decade, automated methods have been developed to detect cracks more efficiently, accurately, and objectively, with the ultimate goal of replacing conventional manual visual inspection techniques. Among these methods, semantic…

计算机视觉与模式识别 · 计算机科学 2024-05-07 Nachuan Ma , Rui Fan , Lihua Xie

In the past few years, we have seen great progress in perception algorithms, particular through the use of deep learning. However, most existing approaches focus on a few categories of interest, which represent only a small fraction of the…

计算机视觉与模式识别 · 计算机科学 2019-10-25 Kelvin Wong , Shenlong Wang , Mengye Ren , Ming Liang , Raquel Urtasun

We propose a novel non-parametric adaptive anomaly detection algorithm for high dimensional data based on score functions derived from nearest neighbor graphs on $n$-point nominal data. Anomalies are declared whenever the score of a test…

机器学习 · 计算机科学 2009-10-29 Manqi Zhao , Venkatesh Saligrama

Video anomaly detection (VAD) is an important computer vision problem. Thanks to the mode coverage capabilities of generative models, the likelihood-based paradigm is catching growing interest, as it can model normal distribution and detect…

计算机视觉与模式识别 · 计算机科学 2025-07-01 Hanwen Zhang , Congqi Cao , Qinyi Lv , Lingtong Min , Yanning Zhang

Object detection in autonomous driving applications implies that the detection and tracking of semantic objects are commonly native to urban driving environments, as pedestrians and vehicles. One of the major challenges in state-of-the-art…

计算机视觉与模式识别 · 计算机科学 2023-04-25 G. Melotti , W. Lu , P. Conde , D. Zhao , A. Asvadi , N. Gonçalves , C. Premebida

Event detection has been an important task in transportation, whose task is to detect points in time when large events disrupts a large portion of the urban traffic network. Travel information {Origin-Destination} (OD) matrix data by map…

机器学习 · 计算机科学 2020-12-29 Yue Hu , Ao Qu , Dan Work

Semi-supervised anomaly detection, which aims to improve the anomaly detection performance by using a small amount of labeled anomaly data in addition to unlabeled data, has attracted attention. Existing semi-supervised approaches assume…

机器学习 · 统计学 2025-02-11 Hiroshi Takahashi , Tomoharu Iwata , Atsutoshi Kumagai , Yuuki Yamanaka