Critical image identification via incident-type definition using smartphone data during an emergency: A case study of the 2020 heavy rainfall event in Korea

Yoonjo Choi, Namhun Kim, Seunghwan Hong, Junsu Bae, Ilsuk Park, Hong Gyoo Sohn

Research output: Contribution to journalArticlepeer-review

Abstract

In unpredictable disaster scenarios, it is important to recognize the situation promptly and take appropriate response actions. This study proposes a cloud computing-based data collection, processing, and analysis process that employs a crowd-sensing application. Clustering algorithms are used to define the major damage types, and hotspot analysis is applied to effectively filter critical data from crowdsourced data. To verify the utility of the proposed process, it is applied to Icheonsi and Anseong-si, both in Gyeonggi-do, which were affected by heavy rainfall in 2020. The results show that the types of incident at the damaged site were effectively detected, and images reflecting the damage situation could be classified using the application of the geospatial analysis technique. For 5 August 2020, which was close to the date of the event, the images were classified with a precision of 100% at a threshold of 0.4. For 24–25 August 2020, the image classification precision exceeded 95% at a threshold of 0.5, except for the mudslide mudflow in the Yul area. The location distribution of the classified images showed a distribution similar to that of damaged regions in unmanned aerial vehicle images.

Original languageEnglish
Article number3562
JournalSensors
Volume21
Issue number10
DOIs
Publication statusPublished - 2021 May 2

Bibliographical note

Funding Information:
Funding: This research was supported by a grant (20009742) of Ministry-Cooperation R&D program of Disaster-Safety, funded by Ministry of Interior and Safety (MOIS, Korea).

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Information Systems
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

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