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LiDAR point clouds captured in rain or snow are often corrupted by weather-induced returns, which can degrade perception and safety-critical scene understanding. This paper proposes Intensity- and Distance-Aware Statistical Outlier Removal…

Signal Processing · Electrical Eng. & Systems 2026-02-06 Chenyang Yan , Mats Bengtsson

Data assimilation (DA) enables hydrologic models to update their internal states using near-real-time observations for more accurate forecasts. With deep neural networks like long short-term memory (LSTM), using either lagged observations…

Fluid Dynamics · Physics 2025-02-25 Amirmoez Jamaat , Yalan Song , Farshid Rahmani , Jiangtao Liu , Kathryn Lawson , Chaopeng Shen

Autonomous Driving (AD) systems exhibit markedly degraded performance under adverse environmental conditions, such as low illumination and precipitation. The underrepresentation of adverse conditions in AD datasets makes it challenging to…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Yoel Shapiro , Yahia Showgan , Koustav Mullick

Advances in perception for self-driving cars have accelerated in recent years due to the availability of large-scale datasets, typically collected at specific locations and under nice weather conditions. Yet, to achieve the high safety…

Adverse weather conditions can negatively affect LiDAR-based object detectors. In this work, we focus on the phenomenon of vehicle gas exhaust condensation in cold weather conditions. This everyday effect can influence the estimation of…

Computer Vision and Pattern Recognition · Computer Science 2022-07-26 Aldi Piroli , Vinzenz Dallabetta , Marc Walessa , Daniel Meissner , Johannes Kopp , Klaus Dietmayer

3D scene perception demands a large amount of adverse-weather LiDAR data, yet the cost of LiDAR data collection presents a significant scaling-up challenge. To this end, a series of LiDAR simulators have been proposed. Yet, they can only…

Computer Vision and Pattern Recognition · Computer Science 2025-04-21 Yang Wu , Yun Zhu , Kaihua Zhang , Jianjun Qian , Jin Xie , Jian Yang

This paper addresses the limitations of adverse weather image restoration approaches trained on synthetic data when applied to real-world scenarios. We formulate a semi-supervised learning framework employing vision-language models to…

Computer Vision and Pattern Recognition · Computer Science 2024-09-04 Jiaqi Xu , Mengyang Wu , Xiaowei Hu , Chi-Wing Fu , Qi Dou , Pheng-Ann Heng

In our contemporary era, meteorological weather forecasts increasingly incorporate ensemble predictions of visibility - a parameter of great importance in aviation, maritime navigation, and air quality assessment, with direct implications…

Applications · Statistics 2025-08-22 Mária Lakatos , Sándor Baran

Climate change is causing the intensification of rainfall extremes. Precipitation projections with high spatial resolution are important for society to prepare for these changes, e.g. to model flooding impacts. Physics-based simulations for…

Atmospheric and Oceanic Physics · Physics 2022-11-30 Henry Addison , Elizabeth Kendon , Suman Ravuri , Laurence Aitchison , Peter AG Watson

With the advent of huges volumes of data produced in the form of fast streams, real-time machine learning has become a challenge of relevance emerging in a plethora of real-world applications. Processing such fast streams often demands high…

Machine Learning · Computer Science 2020-02-07 Jesus L. Lobo , Javier Del Ser , Francisco Herrera

When observing a phenomenon, severe cases or anomalies are often characterised by deviation from the expected data distribution. However, non-deviating data samples may also implicitly lead to severe outcomes. In the case of unsupervised…

Machine Learning · Computer Science 2020-05-18 Athanasios Davvetas , Iraklis A. Klampanos

In this work, we shed light on different data augmentation techniques commonly used in Light Detection and Ranging (LiDAR) based 3D Object Detection. For the bulk of our experiments, we utilize the well known PointPillars pipeline and the…

Computer Vision and Pattern Recognition · Computer Science 2022-08-01 Martin Hahner , Dengxin Dai , Alexander Liniger , Luc Van Gool

Typically, object detection methods for autonomous driving that rely on supervised learning make the assumption of a consistent feature distribution between the training and testing data, this such assumption may fail in different weather…

Computer Vision and Pattern Recognition · Computer Science 2024-08-22 Jinlong Li , Runsheng Xu , Xinyu Liu , Jin Ma , Baolu Li , Qin Zou , Jiaqi Ma , Hongkai Yu

Data augmentation has been widely employed to improve the generalization of deep neural networks. Most existing methods apply fixed or random transformations. However, we find that sample difficulty evolves along with the model's…

Machine Learning · Computer Science 2025-10-02 Suorong Yang , Jie Zong , Lihang Wang , Ziheng Qin , Hai Gan , Pengfei Zhou , Kai Wang , Yang You , Furao Shen

Advancing Machine Learning (ML)-based perception models for autonomous systems necessitates addressing weak spots within the models, particularly in challenging Operational Design Domains (ODDs). These are environmental operating conditions…

Machine Learning · Computer Science 2024-09-02 Ahmed Hammam , Bharathwaj Krishnaswami Sreedhar , Nura Kawa , Tim Patzelt , Oliver De Candido

This study introduces a framework for quality control of measured weather data, including anomaly detection, and infilling missing values. Weather data is a fundamental input to building performance simulations, in which anomalous values…

Machine Learning · Statistics 2020-11-20 Maryam MeshkinKiya , Riccardo Paolini

While multi-modal 3D semantic occupancy prediction typically enhances robustness by fusing camera and LiDAR inputs, its effectiveness is fundamentally constrained by environmental variability. Specifically, camera sensors suffer from severe…

Computer Vision and Pattern Recognition · Computer Science 2026-05-18 A. Enes Doruk , Abdelaziz Hussein , Hasan F. Ates

Multi-agent cooperative perception is an increasingly popular topic in the field of autonomous driving, where roadside LiDARs play an essential role. However, how to optimize the placement of roadside LiDARs is a crucial but often…

Computer Vision and Pattern Recognition · Computer Science 2023-10-12 Wentao Jiang , Hao Xiang , Xinyu Cai , Runsheng Xu , Jiaqi Ma , Yikang Li , Gim Hee Lee , Si Liu

KITTI-CARLA is a dataset built from the CARLA v0.9.10 simulator using a vehicle with sensors identical to the KITTI dataset. The vehicle thus has a Velodyne HDL64 LiDAR positioned in the middle of the roof and two color cameras similar to…

Computer Vision and Pattern Recognition · Computer Science 2021-09-03 Jean-Emmanuel Deschaud

Despite the recent advances of deep neural networks, object detection for adverse weather remains challenging due to the poor perception of some sensors in adverse weather. Instead of relying on one single sensor, multimodal fusion has been…

Computer Vision and Pattern Recognition · Computer Science 2022-04-25 Saket S. Chaturvedi , Lan Zhang , Xiaoyong Yuan