Automated sea ice classification over the baltic sea using multiparametric features of TanDEM-X InSAR images

• Published in: IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium
• Main Authors: Marbouti, Marjan, Antropov, Oleg, Eriksson, Patrick, Praks, Jaan, Arabzadeh, Vahid, Rinne, Eero, Leppäranta, Matti
• Format: Article in Journal/Newspaper
• Language: English
• Published: IEEE Institute of Electrical and Electronic Engineers 2018
• Subjects: Maximum likelihood; Random forests; Remote sensing; Sea ice classification; TanDEM-X; Sea ice
• Online Access: https://cris.vtt.fi/en/publications/a82a7034-0fba-4d14-b4a4-b25a6cafeea5; https://doi.org/10.1109/IGARSS.2018.8518996; http://www.scopus.com/inward/record.url?scp=85064192218&partnerID=8YFLogxK

In this study, bistatic interferometric Synthetic Aperture Radar (InSAR) data acquired by the TanDEM-X mission were used for automated classification of sea ice over the Baltic Sea, in the Bothnic Bay. A scene acquired in March of 2012 was used in the study. Backscatter-intensity, coherencemagnitude and InSAR-phase, as well as their different combinations, were used as informative features in several classification approaches. In order to achieve the best discrimination between open water and several sea ice types (new ice, thin smooth ice, close ice, very close ice, ridged ice, heavily ridged ice and ship-track), Random Forests (RF) and Maximum likelihood (ML) classifiers were employed. The best overall accuracies were achieved using combination of backscatter-intensity & InSAR-phase and backscatterintensity & coherence-magnitude, and were 76.86% and 75.81% with RF and ML classifiers, respectively. Overall, the combination of backscatter-intensity & InSAR-phase with RF classifier was suggested due to the highest overall accuracy (OA) and smaller computing time in comparison to ML. In contrast to several earlier studies, we were able to discriminate water and the thin smooth ice.