| Technology and Methodology |
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An improved topographic correction based on the Three Factor + C model |
| ZHANG Weige1,2, YANG Liao1, CAO Liangzhong1,2, JIA Yang1,2 |
1. Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract The topographic correction is the most critical component part of the remote sensing quantitative study of rugged terrain areas. According to the idea of slope grading in combination with the simplified Three Factor + C model, a Three Factor +C +Slope model was established to eliminate the defect of traditional and empirical topographic correction using the same coefficient as the slope changing. The results show that the Three Factor+C+ Slope model is better than the C model, the SCS model, the Three Factor model and the Three Factor + C model in six calibration test indicators comprising the mean value, the standard deviation, the correlation between pixel value and illumination coefficient, the radiance discrepancy before and after correction, the dispersion index and the homogeneity coefficient. Due to its advantages such as excellent physical mechanism and considerable removal of the terrain effects on radiance, the Three Factor + C + Slope model is feasible and worthy of promotion.
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| Keywords
ALOS image
Hanggin Rear Banner
spectral characteristics
classification standard of land salinization
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Issue Date: 02 March 2015
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2015,
Vol. 27
