Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference (한국측량학회:학술대회논문집)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
권호 표지

Visualization Of Aerial Color Imagery Through Shadow Effect Correction

  • Sohn, Hong-Gyoo (Dept. of Civil and Environment Engineering, Yonsei University) ;
  • Yun, Kong-Hyun (Dept. of Civil and Environment Engineering, Yonsei University) ;
  • Yang, In-Tae (Dept. of Civil Engineering, Kangwon National University) ;
  • Lee, Kangwon (Hanjin Information Systems & Telecommunication Co., Ltd.)
  • Published : 2004.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Correction of shadow effects is critical step for image interpretation and feature extraction from aerial imagery. In this paper, an efficient algorithm to correct shadow effects from aerial color imagery is presented. The following steps have been performed to remove the shadow effect. First, the shadow regions are precisely located using the solar position and the height of ground objects derived from LIDAR (Light Detection and Ranging) data. Subsequently, segmentation of context regions is implemented for accurate correction with existing digital map. Next step, to calculate correction factor the comparison between the context region and the same non-shadowed context region is made. Finally, corrected image is generated by correcting the shadow effect. The result presented here helps to accurately extract and interpret geo-spatial information from aerial color imagery

Keywords