FIGURE 1. Design of Siemens star
FIGURE 2. Concept of modulation value analysis
FIGURE 3. DN of image with black and white linepairs (Neumann, 2003)
FIGURE 4. Design of Bar target
FIGURE 6. Siemens star and Bar target in study area
FIGURE 5. DN value of Bar Number
FIGURE 7. MTF graph
TABLE 1. Specifications of UAVs and the cameras and Flight parameters for UAV image
TABLE 2. Siemens star and Bar target appeared in orthoimages
TABLE 3. Analysis of Resolution Using Siemens star
TABLE 4. Spatial Resolutions Measured By Different Targets
TABLE 5. σ MTF Analysis Results
참고문헌
- Agisoft, 2018. Photoscan User Manual: Professional Edition. Ver 1.4. St. Petersburg. 118p.
- Honkavaara, E. 2008. Calibrating digital photogrammetric airborne imaging systems using a test field. Ph. D. Thesis. Helsinki University of Technology, Helsinki, Finland. 62p.
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- Lee, J.O. and S.M. Sung. 2018. Assessment of positioning accuracy of UAV photogrammetry based on RTK-GPS. Journal of the Korea Academia-Industrial. 19(4):63-68.
- Lee, T.Y. 2012. Spatial resolution analysis of aerial digital camera. Ph.D. thesis. Dong-A University, Busan, Korea. 153p.
- Liang Y., Y. Zeng., W. Jiang. and X. Wang. 2012. Research on automatic inspection methods of image quality of digital aerial photography results. Computer and Computing Technologies in Agriculture V. pp.320-331.
- Linda, S. and S. George. 2000. Computer Vision. Prentice Hall. pp.97-105.
- McAndrew, A. 2004. Introduction to digital image processing with MATLAB. CENGAGE Learning Publishing Co., pp.241-249.(김태호, 권영만, 전명권 옮김. 2011. 매트랩을 이용한 영상처리의 기초. pp.241-249. 한티미디어. 서울)
- Neuman, A. 2003. Methods to measure resolution of digital cameras. Master Thesis. University of Applied Sciences, Cologne, Germarny. 5p.
- NGII. 2016. Airborne Photogrammetry Work Regulations, National Geographic Information Institute. Suwon. p.55.
- Otsu, N. 1979. A Threshold selection method from gray-level histograms, IEEE Transaction on Systems. pp. 62-66.
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- 효율적인 농업면적 조사를 위한 무인항공기와 GIS의 활용 vol.10, pp.12, 2020, https://doi.org/10.22156/cs4smb.2020.10.12.201
- 정상운영기간동안의 KOMPSAT-3A호 주요 영상 품질 인자별 특성 vol.36, pp.6, 2020, https://doi.org/10.7780/kjrs.2020.36.6.2.2
- 유·무인 항공영상을 이용한 심층학습 기반 녹피율 산정 vol.37, pp.6, 2019, https://doi.org/10.7780/kjrs.2021.37.6.1.22