Image Semantics in the Description and Categorization of Journalistic Photographs

Laine-Hernandez, Mari and Westman, Stina Image Semantics in the Description and Categorization of Journalistic Photographs., 2006 . In 69th Annual Meeting of the American Society for Information Science and Technology (ASIST), Austin (US), 3-8 November 2006. [Conference paper]


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English abstract

This paper reports a study on the description and categorization of images. The aim of the study was to evaluate existing indexing frameworks in the context of reportage photographs and to find out how the use of this particular image genre influences the results. The effect of different tasks on image description and categorization was also studied. Subjects performed keywording and free description tasks and the elicited terms were classified using the most extensive one of the reviewed frameworks. Differences were found in the terms used in constrained and unconstrained descriptions. Summarizing terms such as abstract concepts, themes, settings and emotions were used more frequently in keywording than in free description. Free descriptions included more terms referring to locations within the images, people and descriptive terms due to the narrative form the subjects used without prompting. The evaluated framework was found to lack some syntactic and semantic classes present in the data and modifications were suggested. According to the results of this study image categorization is based on high-level interpretive concepts, including affective and abstract themes. The results indicate that image genre influences categorization and keywording modifies and truncates natural image description.

Item type: Conference paper
Keywords: image content ; free description ; keywording ; categorization ; image categories ; multidimensional scaling ; hierarchical cluster analysis
Subjects: B. Information use and sociology of information > BH. Information needs and information requirements analysis.
I. Information treatment for information services > IC. Index languages, processes and schemes.
H. Information sources, supports, channels. > HG. Non-print materials.
I. Information treatment for information services > IH. Image systems.
I. Information treatment for information services > IA. Cataloging, bibliographic control.
Depositing user: Norm Medeiros
Date deposited: 14 Dec 2006
Last modified: 02 Oct 2014 12:05


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