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Shoaib Ehsan

17 accepted papers

2026

On Motion Blur and Deblurring in Visual Place Recognition

ICRA 2026poster

Visual Place Recognition (VPR) in mobile robotics enables robots to localize themselves by recognizing previously visited locations using visual data. While the reliability of VPR methods has been extensively studied under conditions such as changes in illumination, season, weather and viewpoint, th…

2026

Structured Pruning for Efficient Visual Place Recognition

ICRA 2026poster

Visual Place Recognition (VPR) is fundamental for the global re-localization of robots and devices, enabling them to recognize previously visited locations based on visual inputs. This capability is crucial for maintaining accurate mapping and localization over large areas. Given that VPR methods ne…

2026

TeTRA-VPR: A Ternary Transformer Approach for Compact Visual Place Recognition

ICRA 2026poster

Visual Place Recognition (VPR) localizes a query image by matching it against a database of geo-tagged reference images, making it essential for navigation and mapping in robotics. Although Vision Transformer (ViT) solutions deliver high accuracy, their large models often exceed the memory and compu…

2026

Through the Lens of Doubt: Robust and Efficient Uncertainty Estimation for Visual Place Recognition

RA-L 2026

Visual Place Recognition (VPR) enables robots and autonomous vehicles to identify previously visited locations by matching current observations against a database of known places. However, VPR systems face significant challenges when deployed across varying visual environments, lighting conditions,

Cited by 0SourceScholar
2025

On Motion Blur and Deblurring in Visual Place Recognition

RA-L 2025

Visual Place Recognition (VPR) in mobile robotics enables robots to localize themselves by recognizing previously visited locations using visual data. While the reliability of VPR methods has been extensively studied under conditions such as changes in illumination, season, weather and viewpoint, th

Cited by 8SourceScholar
2025

Structured Pruning for Efficient Visual Place Recognition

RA-L 2025

Visual Place Recognition (VPR) is fundamental for the global re-localization of robots and devices, enabling them to recognize previously visited locations based on visual inputs. This capability is crucial for maintaining accurate mapping and localization over large areas. Given that VPR methods ne

Cited by 1SourceScholar
2025

TeTRA-VPR: A Ternary Transformer Approach for Compact Visual Place Recognition

RA-L 2025

Visual Place Recognition (VPR) localizes a query image by matching it against a database of geo-tagged reference images, making it essential for navigation and mapping in robotics. Although Vision Transformer (ViT) solutions deliver high accuracy, their large models often exceed the memory and compu

Cited by 2SourceScholar
2024

Aggregating Multiple Bio-Inspired Image Region Classifiers for Effective and Lightweight Visual Place Recognition

RA-L 2024

Visual place recognition (VPR) enables autonomous systems to localize themselves within an environment using image information. While VPR techniques built upon a Convolutional Neural Network (CNN) backbone dominate state-of-the-art VPR performance, their high computational requirements make them uns

Cited by 1SourceScholar
2024

Design Space Exploration of Low-Bit Quantized Neural Networks for Visual Place Recognition

RA-L 2024

Visual Place Recognition (VPR) is a critical task for performing global re-localization in visual perception systems, requiring the ability to recognize a previously visited location under variations such as illumination, occlusion, appearance and viewpoint. In the case of robotics, the target devic

Cited by 9SourceScholar
2023

A Complementarity-Based Switch-Fuse System for Improved Visual Place Recognition

IROS 2023poster

Recently several fusion and switching based approaches have been presented to solve the problem of Visual Place Recognition. In spite of these systems demonstrating significant boost in VPR performance they each have their own set of limitations. The multi-process fusion systems usually involve empl…

Cited by 2SourceScholar
2022

An Efficient and Scalable Collection of Fly-Inspired Voting Units for Visual Place Recognition in Changing Environments

RA-L 2022

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 too expensive for the most hardware restricted robot applicati

Cited by 23SourceScholar
2022

Highly-Efficient Binary Neural Networks for Visual Place Recognition

IROS 2022poster

VPR is a fundamental task for autonomous navigation as it enables a robot to localize itself in the workspace when a known location is detected. Although accuracy is an essential requirement for a VPR technique, computational and energy efficiency are not less important for real-world applications.…

Cited by 11SourceScholar
2022

OpenSceneVLAD: Appearance Invariant, Open Set Scene Classification

ICRA 2022poster

Scene classification is a well-established area of computer vision research that aims to classify a scene image into pre-defined categories such as playground, beach and airport. Recent work has focused on increasing the variety of pre-defined categories for classification, but so far failed to cons…

Cited by 5SourceScholar
2022

SwitchHit: A Probabilistic, Complementarity-Based Switching System for Improved Visual Place Recognition in Changing Environments

IROS 2022

Visual place recognition (VPR) - a fundamental task in computer vision and robotics - is the problem of identifying a place mainly based on visual information. View-point and appearance changes, such as due to weather and seasonal variations, make this task challenging. Currently, there is no univer

Cited by 8SourceScholar
2021

Improving Visual Place Recognition Performance by Maximising Complementarity

RA-L 2021

Visual place recognition (VPR) is the problem of recognising a previously visited location using visual information. Many attempts to improve the performance of VPR methods have been made in the literature. One approach that has received attention recently is the multi-process fusion where different

Cited by 17SourceScholar
2020

CoHOG: A Light-Weight, Compute-Efficient, and Training-Free Visual Place Recognition Technique for Changing Environments

RA-L 2020

This letter presents a novel, compute-efficient and training-free approach based on Histogram-of-OrientedGradients (HOG) descriptor for achieving state-of-the-art performance-per-compute-unit in Visual Place Recognition (VPR). The inspiration for this approach (namely CoHOG) is based on the convolut

Cited by 96SourceScholar
2020

Exploring Performance Bounds of Visual Place Recognition Using Extended Precision

RA-L 2020

Recent advances in image description and matching allowed significant improvements in Visual Place Recognition (VPR). The wide variety of methods proposed so far and the increase of the interest in the field have rendered the problem of evaluating VPR methods an important task. As part of the locali

Cited by 39SourceScholar