Dr. Mantian Li Profile

Dr. Mantian Li

at Harbin Inst of Technology

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SPIE Journal Paper | 8 April 2023

Framework of degraded image restoration and simultaneous localization and mapping for multiple bad weather conditions

Yunlong Dong, Wei Guo, Mantian Li, Fusheng Zha, Bing Shao, Lining Sun

OE, Vol. 62, Issue 04, 048102, (April 2023) https://doi.org/10.1117/12.10.1117/1.OE.62.4.048102

KEYWORDS: Image restoration, Rain, Adverse weather, Machine learning, Education and training, Air contamination, Image processing, Visualization, Optical engineering, Mobile robots

Read Abstract +

Image degradation caused by bad weather, such as haze, rain, and snow, significantly degrades a vision system’s performance, imposing challenges to the autonomous motion of mobile robots. Therefore, it is crucial to restore the degraded images for mobile robots operating outdoors. Spurred by this concern, a framework that restores degraded images and affords simultaneous localization and mapping (SLAM) under multiple bad weather conditions is presented. Specifically, the developed architecture combines the advantages of convolutional neural network features and weather features. It improves the accuracy of identifying the degradation type by developing a weather inference module based on ensemble learning. According to the internal mechanism of image degradation, a degraded image restoration method is proposed utilizing physical models, with a subsequent operation refining the preliminary restored results. To improve our method’s adaptability to real scenes, unpaired real-world weather images are introduced into the degradation removal algorithm through generative adversarial networks. The proposed weather persistent assumption combines weather inference and degradation restoration modules in the SLAM system to capture multiple weather conditions, which improves the system’s accuracy and running speed. Comprehensive experiments evaluating the developed framework and its components highlight that the proposed weather inference and degraded image restoration methods achieve a highly appealing effect. The final experimental results demonstrate that our framework autonomously identifies weather types, triggers the corresponding restoration, and realizes accurate localization in multiple bad weather conditions. It affords SLAM accuracy under multiple bad weather conditions that is close to raw SLAM in clear weather.

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