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Recognizing a traffic accident is an essential part of any autonomous driving or road monitoring system. An accident can appear in a wide variety of forms, and understanding what type of accident is taking place may be useful to prevent it…

Computer Vision and Pattern Recognition · Computer Science 2025-01-10 Aaron Lohner , Francesco Compagno , Jonathan Francis , Alessandro Oltramari

Multiple object tracking (MOT) in urban traffic aims to produce the trajectories of the different road users that move across the field of view with different directions and speeds and that can have varying appearances and sizes. Occlusions…

Computer Vision and Pattern Recognition · Computer Science 2018-09-07 Hui-Lee Ooi , Guillaume-Alexandre Bilodeau , Nicolas Saunier , David-Alexandre Beaupré

We tackle the problem of estimating optical flow from a monocular camera in the context of autonomous driving. We build on the observation that the scene is typically composed of a static background, as well as a relatively small number of…

Computer Vision and Pattern Recognition · Computer Science 2016-08-24 Min Bai , Wenjie Luo , Kaustav Kundu , Raquel Urtasun

This paper presents a language-powered paradigm for ordinal regression. Existing methods usually treat each rank as a category and employ a set of weights to learn these concepts. These methods are easy to overfit and usually attain…

Computer Vision and Pattern Recognition · Computer Science 2022-10-04 Wanhua Li , Xiaoke Huang , Zheng Zhu , Yansong Tang , Xiu Li , Jie Zhou , Jiwen Lu

Existing open-vocabulary object detection (OVD) develops methods for testing unseen categories by aligning object region embeddings with corresponding VLM features. A recent study leverages the idea that VLMs implicitly learn compositional…

Computer Vision and Pattern Recognition · Computer Science 2024-12-25 Hojun Choi , Junsuk Choe , Hyunjung Shim

With rapid urbanization in the modern era, traffic signals from various sensors have been playing a significant role in monitoring the states of cities, which provides a strong foundation in ensuring safe travel, reducing traffic congestion…

Artificial Intelligence · Computer Science 2025-11-18 Haolong Xiang , Peisi Wang , Xiaolong Xu , Kun Yi , Xuyun Zhang , Quanzheng Sheng , Amin Beheshti , Wei Fan

To address the limitations of existing open-vocabulary object recognition methods, specifically high system complexity, substantial training costs, and limited generalization, this paper proposes a novel Open-Vocabulary Object Recognition…

Computer Vision and Pattern Recognition · Computer Science 2026-03-09 Wei Yu Chen , Ying Dai

In this paper, we present a solution to Large-Scale Video Classification Challenge (LSVC2017) [1] that ranked the 1st place. We focused on a variety of modalities that cover visual, motion and audio. Also, we visualized the aggregation…

Computer Vision and Pattern Recognition · Computer Science 2017-10-31 Chen Chen , Xiaowei Zhao , Yang Liu

In this paper, we present a new method for detecting road users in an urban environment which leads to an improvement in multiple object tracking. Our method takes as an input a foreground image and improves the object detection and…

Computer Vision and Pattern Recognition · Computer Science 2018-01-30 David-Alexandre Beaupré , Guillaume-Alexandre Bilodeau , Nicolas Saunier

Object detection is an important task in environment perception for autonomous driving. Modern 2D object detection frameworks such as Yolo, SSD or Faster R-CNN predict multiple bounding boxes per object that are refined using…

Computer Vision and Pattern Recognition · Computer Science 2020-06-16 Nils Gählert , Niklas Hanselmann , Uwe Franke , Joachim Denzler

Density ratio estimation is a core concept in statistical machine learning because it provides a unified mechanism for tasks such as importance weighting, divergence estimation, and likelihood-free inference, but its potential in vision and…

Computer Vision and Pattern Recognition · Computer Science 2025-12-01 Fumiya Uchiyama , Rintaro Yanagi , Shohei Taniguchi , Shota Takashiro , Masahiro Suzuki , Hirokatsu Kataoka , Yusuke Iwasawa , Yutaka Matsuo

Urban traffic environments present unique challenges for object detection, particularly with the increasing presence of micromobility vehicles like e-scooters and bikes. To address this object detection problem, this work introduces an…

Computer Vision and Pattern Recognition · Computer Science 2024-10-31 Khalil Sabri , Célia Djilali , Guillaume-Alexandre Bilodeau , Nicolas Saunier , Wassim Bouachir

Traffic congestion anomaly detection is of paramount importance in intelligent traffic systems. The goals of transportation agencies are two-fold: to monitor the general traffic conditions in the area of interest and to locate road segments…

Machine Learning · Computer Science 2022-06-30 Zhuangwei Kang , Ayan Mukhopadhyay , Aniruddha Gokhale , Shijie Wen , Abhishek Dubey

Avoiding congestion and controlling traffic in urban scenarios is becoming nowadays of paramount importance due to the rapid growth of our cities' population and vehicles. The effective control of urban traffic as a means to mitigate…

Artificial Intelligence · Computer Science 2022-08-08 Matteo Cardellini

Explainable object recognition using vision-language models such as CLIP involves predicting accurate category labels supported by rationales that justify the decision-making process. Existing methods typically rely on prompt-based…

Computer Vision and Pattern Recognition · Computer Science 2025-08-21 Ali Rasekh , Sepehr Kazemi Ranjbar , Simon Gottschalk

Traffic congestion in metropolitan areas presents a formidable challenge with far-reaching economic, environmental, and societal ramifications. Therefore, effective congestion management is imperative, with traffic signal control (TSC)…

Systems and Control · Electrical Eng. & Systems 2024-06-13 Maonan Wang , Aoyu Pang , Yuheng Kan , Man-On Pun , Chung Shue Chen , Bo Huang

Mobile traffic prediction is an important enabler for optimizing resource allocation and improving energy efficiency in mobile wireless networks. Building on the advanced contextual understanding and generative capabilities of large…

Networking and Internet Architecture · Computer Science 2025-06-17 Han Zhang , Akram Bin Sediq , Ali Afana , Melike Erol-Kantarci

Recent years have witnessed a significant increase in the performance of Vision and Language tasks. Foundational Vision-Language Models (VLMs), such as CLIP, have been leveraged in multiple settings and demonstrated remarkable performance…

Computer Vision and Pattern Recognition · Computer Science 2024-03-04 Santiago Castro , Amir Ziai , Avneesh Saluja , Zhuoning Yuan , Rada Mihalcea

Modal split prediction in transportation networks has the potential to support network operators in managing traffic congestion and improving transit service reliability. We focus on the problem of hourly prediction of the fraction of…

Machine Learning · Computer Science 2023-03-17 Aron Brenner , Manxi Wu , Saurabh Amin

Semantic segmentation consists of predicting a semantic label for each image pixel. While existing deep learning approaches achieve high accuracy, they often overlook the ordinal relationships between classes, which can provide critical…

Computer Vision and Pattern Recognition · Computer Science 2025-02-06 Ricardo P. M. Cruz , Rafael Cristino , Jaime S. Cardoso