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Topographic correction of HiRISE and CaSSIS images: Validation and application to color observations of Martian albedo features
Planetary and Space Science ( IF 2.4 ) Pub Date : 2021-03-15 , DOI: 10.1016/j.pss.2021.105198
G. Munaretto , M. Pajola , A. Lucchetti , C. Re , G. Cremonese , E. Simioni , P. Cambianica , N. Thomas

The topographic correction of satellite images has to be applied to both disentangle albedo features from illumination effects induced by local topography and perform spectrophotometric analyses of planetary surfaces. This work focuses on the modeling and removal of surface brightness variations induced by topography, referred as topographic shading, from high resolution images of Mars. Topographic shading can be modeled through functions of the surface illumination and observation angles called disk functions. We consider four disk functions that are widely used in planetary photometry: the Lambert, Lommel-Seeliger, Akimov and Minnaert disk functions. We test and evaluate their performances in removing topographic shading from High Resolution Imaging Science Experiment (HiRISE) and Colour and Surface Science Imaging System (CaSSIS) images. We here validate our method, moreover, we report scientific applications to single or multi-band datasets by analyzing topographically corrected HiRISE colour observations of Martian recurring slope lineae and dust devil tracks, as well as CaSSIS panchromatic observations.



中文翻译:

HiRISE和CaSSIS图像的地形校正:火星反照率特征的色彩验证和应用

卫星图像的地形校正必须应用于将反照率特征与由局部地形引起的照明效果分开,并对行星表面进行分光光度分析。这项工作的重点是从火星的高分辨率图像中建模和消除由地形引起的表面亮度变化(称为地形阴影)。可以通过表面照明和观测角函数(称为圆盘函数)对地形阴影进行建模。我们考虑了在行星光度学中广泛使用的四个磁盘函数:Lambert,Lommel-Seeliger,Akimov和Minnaert磁盘函数。我们测试并评估了它们在消除高分辨率影像科学实验(HiRISE)和色彩与表面科学影像系统(CaSSIS)图像中的地形阴影方面的性能。

更新日期:2021-03-23
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