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Image retrieval in realistic scenarios targets large dynamic datasets of unlabeled images. In these cases, training or fine-tuning a model every time new images are added to the database is neither efficient nor scalable. Convolutional…

Computer Vision and Pattern Recognition · Computer Science 2017-07-11 Albert Jimenez , Jose M. Alvarez , Xavier Giro-i-Nieto

Convolutional Neural Networks (CNNs) have revolutionized the understanding of visual content. This is mainly due to their ability to break down an image into smaller pieces, extract multi-scale localized features and compose them to…

Computer Vision and Pattern Recognition · Computer Science 2021-10-26 Zachary Wharton , Ardhendu Behera , Asish Bera

LiDAR Place Recognition (LPR) is a key component in robotic localization, enabling robots to align current scans with prior maps of their environment. While Visual Place Recognition (VPR) has embraced Vision Foundation Models (VFMs) to…

Robotics · Computer Science 2025-08-11 Minwoo Jung , Lanke Frank Tarimo Fu , Maurice Fallon , Ayoung Kim

Visual Place Recognition (VPR) in areas with similar scenes such as urban or indoor scenarios is a major challenge. Existing VPR methods using global descriptors have difficulty capturing local specific regions (LSR) in the scene and are…

Computer Vision and Pattern Recognition · Computer Science 2022-02-14 Yingfeng Cai , Junqiao Zhao , Jiafeng Cui , Fenglin Zhang , Chen Ye , Tiantian Feng

In fine-grained image recognition (FGIR), the localization and amplification of region attention is an important factor, which has been explored a lot by convolutional neural networks (CNNs) based approaches. The recently developed vision…

Computer Vision and Pattern Recognition · Computer Science 2021-07-20 Yunqing Hu , Xuan Jin , Yin Zhang , Haiwen Hong , Jingfeng Zhang , Yuan He , Hui Xue

Visual place recognition (VPR) is a challenging task with the unbalance between enormous computational cost and high recognition performance. Thanks to the practical feature extraction ability of the lightweight convolution neural networks…

Computer Vision and Pattern Recognition · Computer Science 2024-04-17 Qingyuan Gong , Yu Liu , Liqiang Zhang , Renhe Liu

In robotics, Spiking Neural Networks (SNNs) are increasingly recognized for their largely-unrealized potential energy efficiency and low latency particularly when implemented on neuromorphic hardware. Our paper highlights three advancements…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Somayeh Hussaini , Michael Milford , Tobias Fischer

Point cloud-based large scale place recognition is an important but challenging task for many applications such as Simultaneous Localization and Mapping (SLAM). Taking the task as a point cloud retrieval problem, previous methods have made…

Computer Vision and Pattern Recognition · Computer Science 2022-08-30 Zhaoxin Fan , Zhenbo Song , Wenping Zhang , Hongyan Liu , Jun He , Xiaoyong Du

This paper proposes an end-to-end deep reinforcement learning approach for mobile robot navigation with dynamic obstacles avoidance. Using experience collected in a simulation environment, a convolutional neural network (CNN) is trained to…

Robotics · Computer Science 2020-02-12 Guangda Chen , Lifan Pan , Yu'an Chen , Pei Xu , Zhiqiang Wang , Peichen Wu , Jianmin Ji , Xiaoping Chen

Visual place recognition (VPR) is a key issue for robotics and autonomous systems. For the trade-off between time and performance, most of methods use the coarse-to-fine hierarchical architecture, which consists of retrieving top-N…

Computer Vision and Pattern Recognition · Computer Science 2022-02-15 Y. Shen , R. Wang , W. Zuo , N. Zheng

A recent approach to the Visual Place Recognition (VPR) problem has been to fuse the place recognition estimates of multiple complementary VPR techniques simultaneously. However, selecting the optimal set of techniques to use in a specific…

Computer Vision and Pattern Recognition · Computer Science 2021-12-10 Stephen Hausler , Tobias Fischer , Michael Milford

State-of-the-art visual place recognition performance is currently being achieved utilizing deep learning based approaches. Despite the recent efforts in designing lightweight convolutional neural network based models, these can still be…

Computer Vision and Pattern Recognition · Computer Science 2021-09-24 Bruno Arcanjo , Bruno Ferrarini , Michael Milford , Klaus D. McDonald-Maier , Shoaib Ehsan

We introduce Region-Aware Deformable Convolution (RAD-Conv), a new convolutional operator that enhances neural networks' ability to adapt to complex image structures. Unlike traditional deformable convolutions, which are limited to fixed…

Computer Vision and Pattern Recognition · Computer Science 2025-09-22 Abolfazl Saheban Maleki , Maryam Imani

In this paper two new learning-based eXplainable AI (XAI) methods for deep convolutional neural network (DCNN) image classifiers, called L-CAM-Fm and L-CAM-Img, are proposed. Both methods use an attention mechanism that is inserted in the…

Computer Vision and Pattern Recognition · Computer Science 2022-09-23 Ioanna Gkartzonika , Nikolaos Gkalelis , Vasileios Mezaris

We propose an object detection system that relies on a multi-region deep convolutional neural network (CNN) that also encodes semantic segmentation-aware features. The resulting CNN-based representation aims at capturing a diverse set of…

Computer Vision and Pattern Recognition · Computer Science 2015-09-25 Spyros Gidaris , Nikos Komodakis

Utilizing visual place recognition (VPR) technology to ascertain the geographical location of publicly available images is a pressing issue for real-world VPR applications. Although most current VPR methods achieve favorable results under…

Computer Vision and Pattern Recognition · Computer Science 2023-12-06 Gaoshuang Huang , Yang Zhou , Xiaofei Hu , Chenglong Zhang , Luying Zhao , Wenjian Gan , Mingbo Hou

The task of Visual Place Recognition (VPR) is to predict the location of a query image from a database of geo-tagged images. Recent studies in VPR have highlighted the significant advantage of employing pre-trained foundation models like…

Computer Vision and Pattern Recognition · Computer Science 2026-02-11 Issar Tzachor , Boaz Lerner , Matan Levy , Michael Green , Tal Berkovitz Shalev , Gavriel Habib , Dvir Samuel , Noam Korngut Zailer , Or Shimshi , Nir Darshan , Rami Ben-Ari

We tackle the problem of large scale visual place recognition, where the task is to quickly and accurately recognize the location of a given query photograph. We present the following three principal contributions. First, we develop a…

Computer Vision and Pattern Recognition · Computer Science 2016-05-03 Relja Arandjelović , Petr Gronat , Akihiko Torii , Tomas Pajdla , Josef Sivic

Road segmentation in challenging domains, such as night, snow or rain, is a difficult task. Most current approaches boost performance using fine-tuning, domain adaptation, style transfer, or by referencing previously acquired imagery. These…

Computer Vision and Pattern Recognition · Computer Science 2022-05-30 Connor Malone , Sourav Garg , Ming Xu , Thierry Peynot , Michael Milford

Visual place recognition (VPR) is a fundamental task of computer vision for visual localization. Existing methods are trained using image pairs that either depict the same place or not. Such a binary indication does not consider continuous…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Maria Leyva-Vallina , Nicola Strisciuglio , Nicolai Petkov