Journal of Korea Multimedia Society (한국멀티미디어학회논문지)

Korea Multimedia Society (한국멀티미디어학회)
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DCT and DWT based Damaged Weather Radar Image Retrieval

DCT 및 DWT 기반의 손상된 기상레이더 영상 복원 기법

  • Jang, Bong-Joo (Korea Institute of Civil Engineering & Building Technology, Hydro Science and Engineering Research Institute) ;
  • Lim, Sanghun (Korea Institute of Civil Engineering & Building Technology, Hydro Science and Engineering Research Institute) ;
  • Kim, Won (Korea Institute of Civil Engineering & Building Technology, Hydro Science and Engineering Research Institute) ;
  • Noh, Huiseong (Korea Institute of Civil Engineering & Building Technology, Hydro Science and Engineering Research Institute)
  • Received : 2017.01.12
  • Accepted : 2017.01.19
  • Published : 2017.02.28
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Abstract

Today, weather radar is used as a key tool for modern high-tech weather observations and forecasts, along with a wide variety of ground gauges and weather satellites. In this paper, we propose a frequency transform based weather radar image processing technique to improve the weather radar image damaged by beam blocking and clutter removal in order to minimize the uncertainty of the weather radar observation. In the proposed method, DCT based mean energy correction is performed to improve damage caused by beam shielding, and DWT based morphological image processing and high frequency cancellation are performed to improve damage caused by clutter removal. Experimental results show that the application of the proposed method to the damaged original weather radar image improves the quality of weather radar image adaptively to the weather echo feature around the damaged area. In addition, radar QPE calculated from the improved weather radar image was also qualitatively confirmed to be improved by the damage. In the future, we will develop quantitative evaluation scales through continuous research and develop an improved algorithm of the proposed method through numerical comparison.

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References

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