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Mask Detection and Classification in Thermal Face Images

Abstract

Face masks are recommended to reduce the transmission of many viruses, especially SARS-CoV-2. Therefore, the automatic detection of whether there is a mask on the face, what type of mask is worn, and how it is worn is an important research topic. In this work, the use of thermal imaging was considered to analyze the possibility of detecting (localizing) a mask on the face, as well as to check whether it is possible to classify the type of mask on the face. The previously proposed dataset of thermal images was extended and annotated with the description of a type of mask and a location of a mask within a face. Different deep learning models were adapted. The best model for face mask detection turned out to be the Yolov5 model in the “nano” version, reaching mAP higher than 97% and precision of about 95%. High accuracy was also obtained for mask type classification. The best results were obtained for the convolutional neural network model built on an autoencoder initially trained in the thermal image reconstruction problem. The pretrained encoder was used to train a classifier which achieved an accuracy of 91%.

Citations

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Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
IEEE Access no. 11, pages 43349 - 43359,
ISSN: 2169-3536
Language:
English
Publication year:
2023
Bibliographic description:
Kowalczyk N., Sobotka M., Rumiński J.: Mask Detection and Classification in Thermal Face Images// IEEE Access -Vol. 11, (2023), s.43349-43359
DOI:
Digital Object Identifier (open in new tab) 10.1109/access.2023.3272214
Sources of funding:
  • Statutory activity/subsidy
Verified by:
Gdańsk University of Technology

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