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Automated detection of block falls in the north polar region of Mars

Fanara, Lida and Gwinner, Klaus and Hauber, Ernst and Oberst, J. (2019) Automated detection of block falls in the north polar region of Mars. Planetary and Space Science, 180. Elsevier. doi: 10.1016/j.pss.2019.104733. ISSN 0032-0633.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0032063318304422


We developed a change detection method for the identification of ice block falls using NASA’s HiRISE images of the north polar scarps on Mars. Our method is based on a Support Vector Machine (SVM), trained using Histograms of Oriented Gradients (HOG), and blob detection. The SVM detects potential new blocks between a set of images; the blob detection, then, confirms the identification of a block inside the area indicated by the SVM and derives the shape of the block. The results from the automatic analysis were compared with block statistics from visual inspection. We tested our method in 6 areas each consisting of 1000 × 1000 pixels, where several hundreds of blocks were identified. The results for the given test areas produced a true positive rate of ~75% for blocks with sizes larger than 0.5 m2 (i.e., approx. 3 times the available ground pixel size) and a false discovery rate of ~8.5%. Using blob detection, we were also able to recover the size of each block within 3 pixels of their actual size.

Item URL in elib:https://elib.dlr.de/131270/
Document Type:Article
Title:Automated detection of block falls in the north polar region of Mars
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Fanara, LidaUNSPECIFIEDhttps://orcid.org/0000-0003-2677-2503UNSPECIFIED
Hauber, ErnstUNSPECIFIEDhttps://orcid.org/0000-0002-1375-304XUNSPECIFIED
Date:9 September 2019
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:Change detection, Block falls, Machine learning, Blob detection, Mars
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Projekt MARS-EXPRESS / HRSC (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Planetary Geology
Deposited By: Scholten, Dipl.-Ing. Frank
Deposited On:28 Nov 2019 09:11
Last Modified:23 Oct 2023 14:14

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