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A Study on Image Resolution Increase According to Sequential Apply Detector Motion Method and Non-Blind Deconvolution for Nondestructive Inspection

비파괴검사를 위한 검출기 이동 방법과 논블라인드 디컨볼루션 순차 적용에 따른 이미지 해상도 증가 연구

  • Soh, KyoungJae (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Kim, ByungSoo (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Uhm, Wonyoung (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Lee, Deahee (The 4th Research and Development Institute, Agency for Defense Development)
  • 소경재 (국방과학연구소 제4기술연구본부) ;
  • 김병수 (국방과학연구소 제4기술연구본부) ;
  • 엄원영 (국방과학연구소 제4기술연구본부) ;
  • 이대희 (국방과학연구소 제4기술연구본부)
  • Received : 2020.06.15
  • Accepted : 2020.09.15
  • Published : 2020.12.05

Abstract

Non-destructive inspection using X-rays is used as a method to check the inside of products. In order to accurately inspect, a X-ray image requires a higher spatial resolution. However, the reduction in pixel size of the X-ray detector, which determines the spatial resolution, is time-consuming and expensive. In this regard, a DMM has been proposed to obtain an improved spatial resolution using the same X-ray detector. However, this has a limitation that the motion blur phenomenon, which is a decrease in spatial resolution. In this paper, motion blur was removed by applying Non-Blind Deconvolution to the DMM image, and the increase in spatial resolution was confirmed. DMM and Non-Blind Deconvolution were sequentially applied to X-ray images, confirming 62 % MTF value by an additional 29 % over 33 % of DMM only. In addition, SSIM and PSNR were compared to confirm the similarity to the 1/2 pixel detector image through 0.68 and 33.21 dB, respectively.