Accurate monitoring of the Danube Delta dynamics using Copernicus data

Corneliu Octavian Dumitru; Gabriel Dax; Gottfried Schwarz; Constantin Cazacu; Mihai Cristian Adamescu; Mihai Datcu

doi:10.1117/12.2532314

14 October 2019 Accurate monitoring of the Danube Delta dynamics using Copernicus data

Corneliu Octavian Dumitru, Gabriel Dax, Gottfried Schwarz, Constantin Cazacu, Mihai Cristian Adamescu, Mihai Datcu

Proceedings Volume 11150, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2019; 1115002 (2019) https://doi.org/10.1117/12.2532314
Event: SPIE Remote Sensing, 2019, Strasbourg, France

Abstract

In the following, we describe highly-automated image analysis approaches that help us classify satellite images, and allow us to monitor dynamical changes in image time series. We concentrated on flooding events within the Danube Delta as seen by the European Sentinel-1 and Sentinel-2 satellites, and describe systematic processing approaches to extract pre-defined categories from the image data (being either Synthetic Aperture Radar or multispectral images). One basic tool to monitor dynamical changes is to analyze and compare the compressibility of image patches using their Normalized Compression Distances. These distances can be converted into similarity matrices providing reliable maps of surface changes. The accuracy of these change maps was quantified for several typical test cases. In addition, we analyzed the performance of an alternative active learning approach, where Gabor filters and Weber local descriptors were used to extract features from image patches that were classified and semantically annotated. Then one can perform data analytics and generate maps based on the extracted semantic annotations; again, we used several representative test cases for benchmarking.

Citation Download Citation

Corneliu Octavian Dumitru, Gabriel Dax, Gottfried Schwarz, Constantin Cazacu, Mihai Cristian Adamescu, and Mihai Datcu "Accurate monitoring of the Danube Delta dynamics using Copernicus data", Proc. SPIE 11150, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2019, 1115002 (14 October 2019); https://doi.org/10.1117/12.2532314

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