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Related Experiment Video

Updated: Sep 7, 2025

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

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Published on: May 10, 2020

Atmospheric Correction for High-Resolution Shape from Shading on Mars.

Marcel Hess¹, Moritz Tenthoff¹, Kay Wohlfarth¹

¹Image Analysis Group, TU Dortmund University, Otto-Hahn-Str. 4, 44227 Dortmund, Germany.

Journal of Imaging

|June 23, 2022

Summary

This study enhances Martian Digital Elevation Models (DEMs) using Shape from Shading and an atmospheric model. It improves DEM accuracy by estimating atmospheric parameters directly from Context Camera imagery.

Keywords:

Hapke model Mars atmosphere digital elevation model shape from shading

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Area of Science:

Planetary Science
Remote Sensing
Photogrammetry

Background:

Digital Elevation Models (DEMs) are vital for Mars remote sensing and rover landing site characterization.
Shape from Shading (SfS) enhances DEM quality, resolution, and accuracy.
Existing SfS methods often require external data and lack atmospheric considerations.

Purpose of the Study:

To adapt a lunar Shape and Albedo from Shading framework for Mars.
To develop a method for DEM generation using an embedded Hapke photometric reflectance model and an atmospheric model.
To directly estimate Martian atmospheric parameters and account for spatially varying albedo without external data.

Main Methods:

Extended a lunar SfS framework to Mars by integrating the Hapke reflectance model with an atmospheric model.
Generated DEMs using imagery from the Mars Reconnaissance Orbiter's Context Camera (CTX).
Validated the method under varying atmospheric conditions (clear and opaque).

Main Results:

The proposed method successfully generates DEMs by directly estimating atmospheric parameters.
Spatially varying albedo was assumed, improving model applicability.
DEM quality was validated for different atmospheric optical depths.

Conclusions:

Atmospheric compensation is crucial for high optical depths to achieve accurate Martian DEMs.
For low optical depths, the Hapke model without atmospheric compensation is sufficient.
The developed framework enhances the utility of Mars orbital imagery for surface characterization.