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Comparison of Visualization Enhancement Techniques for Himawari-8 / AHI-based True Color Image Production

Himawari-8/AHI 기반 True color 영상 생산을 위한 시각화 향상 기법 비교 연구

Han, Hyeon-Gyeong;Lee, Kyeong-Sang;Choi, Sungwon;Seo, Minji;Jin, Donghyun;Seong, Noh-hun;Jung, Daeseong;Kim, Honghee;Han, Kyung-Soo
한현경;이경상;최성원;서민지;진동현;성노훈;정대성;김홍희;한경수

  • Received : 2019.05.07
  • Accepted : 2019.05.20
  • Published : 2019.06.30

Abstract

True color images display colors similar to natural colors. This has the advantage that it is possible to monitor rapidly the complex earth atmosphere phenomenon and the change of the surface type. Currently, various organizations are producing true color images. In Korea, it is necessary to produce true color images by replacing generations with next generation weather satellites. Therefore, in this study, visual enhancement for true color image production was performed using Top of Atmosphere (TOA) data of Advanced Himawari Imager (AHI) sensor mounted on Himawari-8 satellite. In order to improve the visualization, we performed two methods of Nonlinear enhancement and Histogram equalization. As a result, Histogram equalization showed a strong bluish image in the region over $70^{\circ}$ Solar Zenith Angle (SZA) compared to the Nonlinear enhancement and nonlinear enhancement technique showed a reddish vegetation area.

Keywords

True color;Himawari-8/AHI;Histogram equalization;Nonlinear enhancement

Acknowledgement

Supported by : 기상청