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Denoising Autoencoder based Noise Reduction Technique for Raman Spectrometers for Standoff Detection of Chemical Warfare Agents

비접촉식 화학작용제 탐지용 라만 분광계를 위한 Denoising Autoencoder 기반 잡음제거 기술

  • Lee, Chang Sik (School of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Yu, Hyeong-Geun (School of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Jae-Hyeon (School of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Whimin (School of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Dong-Jo (School of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Chang, Dong Eui (School of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Nam, Hyunwoo (The 4th Research and Development Institute, Agency for Defense Development)
  • 이창식 (한국과학기술원 전기및전자공학부) ;
  • 유형근 (한국과학기술원 전기및전자공학부) ;
  • 박재현 (한국과학기술원 전기및전자공학부) ;
  • 김휘민 (한국과학기술원 전기및전자공학부) ;
  • 박동조 (한국과학기술원 전기및전자공학부) ;
  • 장동의 (한국과학기술원 전기및전자공학부) ;
  • 남현우 (국방과학연구소 제4기술연구본부)
  • Received : 2021.03.05
  • Accepted : 2021.06.04
  • Published : 2021.08.05

Abstract

Raman spectrometers are studied and developed for the military purposes because of their nondestructive inspection capability to capture unique spectral features induced by molecular structures of colorless and odorless chemical warfare agents(CWAs) in any phase. Raman spectrometers often suffer from random noise caused by their detector inherent noise, background signal, etc. Thus, reducing the random noise in a measured Raman spectrum can help detection algorithms to find spectral features of CWAs and effectively detect them. In this paper, we propose a denoising autoencoder for Raman spectra with a loss function for sample efficient learning using noisy dataset. We conduct experiments to compare its effect on the measured spectra and detection performance with several existing noise reduction algorithms. The experimental results show that the denoising autoencoder is the most effective noise reduction algorithm among existing noise reduction algorithms for Raman spectrum based standoff detection of CWAs.

Keywords

Acknowledgement

본 연구는 국방과학연구소의 연구비 지원으로 수행되었습니다.(계약번호: UD190007GD)

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