JIANG Kang, HU Changmiao, YU Kai, et al. Landsat TM/ETM + topographic correction method based on smoothed terrain and semi-empirical model[J]. Journal of Remote Sensing, 2014,18(2):287-306.
JIANG Kang, HU Changmiao, YU Kai, et al. Landsat TM/ETM + topographic correction method based on smoothed terrain and semi-empirical model[J]. Journal of Remote Sensing, 2014,18(2):287-306. DOI: 10.11834/jrs.20143258.
Topographic correction reduces terrain effects and improves radiation quality
such enhancements are beneficial to the improvement of computer classification accuracy in mountains. This paper designed a topographic correction method specifically for the global land cover classification of Landsat TM / ETM + data. This method first smoothens the terrain slope angle and then performs a cosine correction based on the smoothed terrain. This method effectively removes radiation abnormalities in the results of Cosine correction( COS) and other Lambertian-based methods. This method and several other common methods
such as C
SCS
and Minnaert corrections
were tested on six Landsat TM / ETM + data from different regions of the world with different land cover types. Visual and statistical analyses were conducted to assess the performance of these methods in terms of two aspects: overcorrection and homogeneity within a land cover class. Comparison results indicate that the smoothing step significantly reduces overcorrection. This simple and effective algorithm avoid complex atmospheric parameter estimations. Engineering requirements of t errain correction for global land cover classification are met.