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Condition-invariant and compact visual place description by convolutional autoencoder

Published online by Cambridge University Press:  15 March 2023

Hanjing Ye
Affiliation:
Shenzhen Key Laboratory of Robotics and Computer Vision, Southern University of Science and Technology, Shenzhen, China Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China
Weinan Chen
Affiliation:
School of Mechanical and Electrical Engineering, Guangdong University of Technology, Guangzhou, China
Jingwen Yu
Affiliation:
Shenzhen Key Laboratory of Robotics and Computer Vision, Southern University of Science and Technology, Shenzhen, China Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China
Li He
Affiliation:
Shenzhen Key Laboratory of Robotics and Computer Vision, Southern University of Science and Technology, Shenzhen, China Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China
Yisheng Guan
Affiliation:
School of Mechanical and Electrical Engineering, Guangdong University of Technology, Guangzhou, China
Hong Zhang*
Affiliation:
Shenzhen Key Laboratory of Robotics and Computer Vision, Southern University of Science and Technology, Shenzhen, China Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China
*
*Corresponding author. E-mail: hzhang@sustech.edu.cn

Abstract

Visual place recognition (VPR) in condition-varying environments is still an open problem. Popular solutions are convolutional neural network (CNN)-based image descriptors, which have been shown to outperform traditional image descriptors based on hand-crafted visual features. However, there are two drawbacks of current CNN-based descriptors: (a) their high dimension and (b) lack of generalization, leading to low efficiency and poor performance in real robotic applications. In this paper, we propose to use a convolutional autoencoder (CAE) to tackle this problem. We employ a high-level layer of a pre-trained CNN to generate features and train a CAE to map the features to a low-dimensional space to improve the condition invariance property of the descriptor and reduce its dimension at the same time. We verify our method in four challenging real-world datasets involving significant illumination changes, and our method is shown to be superior to the state-of-the-art. The code of our work is publicly available at https://github.com/MedlarTea/CAE-VPR.

Information

Type
Research Article
Copyright
© The Author(s), 2023. Published by Cambridge University Press

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