Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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A Study on the Accuracy Estimation by Number of Control Points in High Resolution Images

고해상도 영상에서 기준점 개수에 따른 정확도 평가에 관한 연구

  • Choi, Hyun (Dept. of Civil Engineering, Kyungnam University) ;
  • Kim, Gihong (Dept. of Civil Engineering, Gangneung-Wonju National University) ;
  • Park, Hong-Gi (Dept. of Civil and Environmental Engineering, Gachon University)
  • 최현 (경남대학교 토목공학과) ;
  • 김기홍 (강릉원주대학교 토목공학과) ;
  • 박홍기 (가천대학교 토목환경공학과)
  • Received : 2018.10.15
  • Accepted : 2018.12.05
  • Published : 2018.12.31
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Abstract

The high-resolution satellite images provided by Kompsat-3A, a multipurpose satellite, have various applications such as digital map generation, 3D image generation, and DEM generation. In order to utilize high-resolution satellite images, the user must create an orthoimage in order to use the image in a suitable manner. The position and the number of the ground reference points affect the accuracy of the orthoimage. In particular, the Kompsat-3A satellite image has a high resolution of about 0.5m, so the difficulty in selecting the ground control points and the accuracy of the selected point will have a great influence on the subsequent application process. Therefore, in this study, we analyzed the influence of the number of ground reference points on the accuracy of the terrestrial satellite images.

Keywords

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Fig. 1 Study area of KOMPSAT-3A satellite digital image

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Fig. 2 KOMPSAT-3A orthoimage and digital map overlay

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Fig. 3 Selected ground control points

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Fig. 4 Distribution of ground control points

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Fig. 5 Orthographic images (30 ground control points)

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Fig. 6 X RMSE trend analysis based on number of ground control points

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Fig. 7 Y RMSE trend analysis based on number of ground control points

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Fig. 8 X RMSE trend analysis based on number of ground control points

Table 1. Kompsat-3A Specifications

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Table 2. RMSE according to number of ground control points

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References

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