Image Inspection of Railcar Structural Components: An approach through Deep Learning and Discrete Fourier Transform

  • Rafael L. Rocha Universidade Federal do Pará e Instituto SENAI de Inovação em Tecnologias Minerais
  • Cleison D. Silva Universidade Federal do Pará
  • Ana Claudia S. Gomes Instituto SENAI de Inovação em Tecnologias Minerais
  • Bruno V. Ferreira Instituto SENAI de Inovação em Tecnologias Minerais
  • Eduardo C. Carvalho Instituto SENAI de Inovação em Tecnologias Minerais
  • Ana Carolina Q. Siravenha Instituto Tecnológico Vale
  • Schubert R. Carvalho Instituto Tecnológico Vale

Resumo


Railcar components inspection is one of the most critical tasks in railway maintenance. The use of image processing, coupled with machine learning, has emerged as a solution for replacing current standard methodologies. The spectral analysis gives the frequency representation of a signal and has been largely used in signal processing tasks. In this sense, this work proposes the evaluation of the use of the Discrete Fourier Transform (DFT) in addition to the spatial representation image of railcar components for an automatic detector of defective parts performed by Convolutional Neural Network (CNN) classi cation. The results are given in measures of accuracy, precision, recall, and F1-score metrics in addition to the accuracy boxplot, and showed that the use of the DFT increase in 1.04% the CNN classi cation accuracy.

Palavras-chave: railcar inspection, convolutional neural network, discrete Fourier transform, image classi cation

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Publicado
18/11/2019
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ROCHA, Rafael L.; SILVA, Cleison D.; GOMES, Ana Claudia S.; FERREIRA, Bruno V.; CARVALHO, Eduardo C.; SIRAVENHA, Ana Carolina Q.; CARVALHO, Schubert R.. Image Inspection of Railcar Structural Components: An approach through Deep Learning and Discrete Fourier Transform. In: SYMPOSIUM ON KNOWLEDGE DISCOVERY, MINING AND LEARNING (KDMILE) , 2019, Fortaleza. Anais do VII Symposium on Knowledge Discovery, Mining and Learning. Porto Alegre: Sociedade Brasileira de Computação, nov. 2019 . p. 33-40. DOI: https://doi.org/10.5753/kdmile.2019.8786.