|   | 
Author Sara Barozzi; Jose Luis Fernandez Marquez; Amudha Ravi Shankar; Barbara Pernici
Title Filtering images extracted from social media in the response phase of emergency events Type Conference Article
Year 2019 Publication Proceedings of the 16th International Conference on Information Systems for Crisis Response And Management Abbreviated Journal Iscram 2019
Volume Issue Pages
Keywords rapid mapping, floods, information extraction, filtering, crowdsourcing
Abstract The use of social media to support emergency operators in the first hours of the response phases can improve the

quality of the information available and awareness on ongoing emergency events. Social media contain both textual

and visual information, in the form of pictures and videos. The problem related to the use of social media posts

as a source of information during emergencies lies in the difficulty of selecting the relevant information among

a very large amount of irrelevant information. In particular, we focus on the extraction of images relevant to an

event for rapid mapping purpose. In this paper, a set of possible filters is proposed and analyzed with the goal of

selecting useful images from posts and of evaluating how precision and recall are impacted. Filtering techniques,

which include both automated and crowdsourced steps, have the goal of providing better quality posts and easy

manageable data volumes both to emergency responders and rapid mapping operators. The impact of the filters on

precision and recall in extracting relevant images is discussed in the paper in two different case studies.
Address Politecnico di Milano;University of Geneva
Corporate Author Thesis
Publisher Iscram Place of Publication Valencia, Spain Editor Franco, Z.; González, J.J.; Canós, J.H.
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2411-3387 ISBN 978-84-09-10498-7 Medium
Track T8- Social Media in Crises and Conflicts Expedition Conference 16th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2019)
Notes Approved no
Call Number Serial 1881
Share this record to Facebook