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Modelling perceptions on the evaluation of video summarization

Abdalla, Kalyf; Menezes, Igor Gomes; Oliveira, Luciano

Authors

Kalyf Abdalla

Luciano Oliveira

Abstract

Hours of video are uploaded to streaming platforms every minute, with recommender systems suggesting popular and relevant videos that can help users save time in the searching process. Recommender systems regularly require video summarization as an expert system to automatically identify suitable video entities and events. Since there is no well-established methodology to evaluate the relevance of summarized videos, some studies have made use of user annotations to gather evidence about the effectiveness of summarization methods. Aimed at modelling the user’s perceptions, which ultimately form the basis for testing video summarization systems, this paper seeks to propose: (i) A guideline to collect unrestricted user annotations, (ii) a novel metric called compression level of user annotation (CLUSA) to gauge the performance of video summarization methods, and (iii) a study on the quality of annotated video summaries collected from different assessment scales. These contributions lead to benchmarking video summarization methods with no constraints, even if user annotations are collected from different assessment scales for each method. Our experiments showed that CLUSA is less susceptible to unbalanced compression data sets in comparison to other metrics, hence achieving higher reliability estimates. CLUSA also allows to compare results from different video summarizing approaches.

Journal Article Type Article
Publication Date 2019-10
Journal Expert Systems with Applications
Print ISSN 0957-4174
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 131
Pages 254-265
Institution Citation Abdalla, K., Menezes, I. G., & Oliveira, L. (2019). Modelling perceptions on the evaluation of video summarization. Expert Systems with Applications, 131, 254-265. https://doi.org/10.1016/j.eswa.2019.04.065
DOI https://doi.org/10.1016/j.eswa.2019.04.065
Keywords Video summarization; Subjective evaluation; Evaluation metric
Publisher URL http://doi.org/10.1016/j.eswa.2019.04.065
Additional Information ©2019, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/