Proceedings of the 9th International Conference "Distributed Computing and Grid Technologies in Science and
Education" (GRID'2021), Dubna, Russia, July 5-9, 2021
304
HIGH RESOLUTION IMAGE PROCESSING AND LAND
COVER CLASSIFICATION FOR HYDRO-
GEOMORPHOLOGICAL HIGH-RISK AREA MONITORING
G. Miniello
1,3,a
, M. La Salandra
2
1
Department of Physics, University of Bari, Italy
2
Department of Earth and Geoenvironmental Sciences, University of Bari, Italy
3
Istituto Nazionale di Fisica Nucleare – Sezione di Bari, Italy
E-mail:
a
giorgia.miniello@ba.infn.it
High-resolution image processing for land surface monitoring is fundamental to analyze the impact of
different geomorphological processes on Earth surface for different climate change scenarios. In this
context, photogrammetry is one of the most reliable techniques to generate high-resolution
topographic data, being key to territorial mapping and change detection analysis of landforms in
hydro-geomorphological high-risk areas. An important issue arises as soon as the main goal is to
conduct analyses over extended areas of the Earth surface (such as fluvial systems) in a short time,
since the need to capture large datasets to develop detailed topographic models may limit the
photogrammetric process, due to the high demand of high-performance hardware. In order to
investigate the best set up of computing resources for these very peculiar tasks, a study of the
performance of a photogrammetric workflow based on a FOSS (Free Open-Source Software) SfM
(Structure from Motion) algorithm using different cluster configurations was conducted, leveraging
the computing power of ReCaS-Bari data center infrastructure, which hosts several services such as
HTC, HPC, IaaS, PaaS. Exploiting the high-computing resources available at clusters and choosing
specific set up for the workflow steps, an important reduction of several hours in the processing time
was recorded, especially compared to classic photogrammetric programs processed on a single
workstation with commercial softwares. The high quality of the image details can be used for land
cover classification and preliminary change detection studies using Machine Learning techniques. A
subset of the datasets used for the workflow implementation has been considered to test the
performance of different Convolutional Neural Networks, using progressively more complex layer
sequences, data augmentation and callback functions for training the models. All the results are given
in terms of model accuracy and loss and performance evaluation.
Keywords: Photogrammetry, Unmanned Aerial Vehicles, High-Resolution Data, ReCaS-Bari, Deep
Neural Networks, Land Cover Classification
Giorgia Miniello, Marco La Salandra
Copyright © 2021 for this paper by its authors.
Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0).