-
Stvilia, B.; Jörgensen, C.: Member activities and quality of tags in a collection of historical photographs in Flickr (2010)
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- Abstract
- To enable and guide effective metadata creation it is essential to understand the structure and patterns of the activities of the community around the photographs, resources used, and scale and quality of the socially created metadata relative to the metadata and knowledge already encoded in existing knowledge organization systems. This article presents an analysis of Flickr member discussions around the photographs of the Library of Congress photostream in Flickr. The article also reports on an analysis of the intrinsic and relational quality of the photostream tags relative to two knowledge organization systems: the Thesaurus for Graphic Materials (TGM) and the Library of Congress Subject Headings (LCSH). Thirty seven percent of the original tag set and 15.3% of the preprocessed set (after the removal of tags with fewer than three characters and URLs) were invalid or misspelled terms. Nouns, named entity terms, and complex terms constituted approximately 77% of the preprocessed set. More than a half of the photostream tags were not found in the TGM and LCSH, and more than a quarter of those terms were regular nouns and noun phrases. This suggests that these terms could be complimentary to more traditional methods of indexing using controlled vocabularies.
- Source
- Journal of the American Society for Information Science and Technology. 61(2010) no.12, S.2477-2489
-
Rorissa, A.: ¬A comparative study of Flickr tags and index terms in a general image collection (2010)
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- Abstract
- Web 2.0 and social/collaborative tagging have altered the traditional roles of indexer and user. Traditional indexing tools and systems assume the top-down approach to indexing in which a trained professional is responsible for assigning index terms to information sources with a potential user in mind. However, in today's Web, end users create, organize, index, and search for images and other information sources through social tagging and other collaborative activities. One of the impediments to user-centered indexing had been the cost of soliciting user-generated index terms or tags. Social tagging of images such as those on Flickr, an online photo management and sharing application, presents an opportunity that can be seized by designers of indexing tools and systems to bridge the semantic gap between indexer terms and user vocabularies. Empirical research on the differences and similarities between user-generated tags and index terms based on controlled vocabularies has the potential to inform future design of image indexing tools and systems. Toward this end, a random sample of Flickr images and the tags assigned to them were content analyzed and compared with another sample of index terms from a general image collection using established frameworks for image attributes and contents. The results show that there is a fundamental difference between the types of tags and types of index terms used. In light of this, implications for research into and design of user-centered image indexing tools and systems are discussed.
- Source
- Journal of the American Society for Information Science and Technology. 61(2010) no.11, S.2230-2242
-
Rorissa, A.: Relationships between perceived features and similarity of images : a test of Tversky's contrast model (2007)
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- Abstract
- The rapid growth of the numbers of images and their users as a result of the reduction in cost and increase in efficiency of the creation, storage, manipulation, and transmission of images poses challenges to those who organize and provide access to images. One of these challenges is similarity matching, a key component of current content-based image retrieval systems. Similarity matching often is implemented through similarity measures based on geometric models of similarity whose metric axioms are not satisfied by human similarity judgment data. This study is significant in that it is among the first known to test Tversky's contrast model, which equates the degree of similarity of two stimuli to a linear combination of their common and distinctive features, in the context of image representation and retrieval. Data were collected from 150 participants who performed an image description and a similarity judgment task. Structural equation modeling, correlation, and regression analyses confirmed the relationships between perceived features and similarity of objects hypothesized by Tversky. The results hold implications for future research that will attempt to further test the contrast model and assist designers of image organization and retrieval systems by pointing toward alternative document representations and similarity measures that more closely match human similarity judgments.
- Source
- Journal of the American Society for Information Science and Technology. 58(2007) no.10, S.1401-1418
-
British Library stellt über eine Million gemeinfreie Bilder in Netz (2013)
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- Abstract
- Die British Library hat über eine Million eingescannter Bilder im Web veröffentlicht. Die gemeinfreien, also frei verwendbaren Bilder, die über die Flickr-Seite der britischen Nationalbibliothek erhältlich sind, stammen aus Büchern des 17., 18. und 19. Jahrhundert, wie aus einer Mitteilung hervorgeht. Sie wurden von Microsoft aus 65.000 Büchern digitalisiert. Der Softwarekonzern und die British Library hatten vor acht Jahren eine Zusammenarbeit vereinbart. Die Inhalte von 100.000 Büchern sollten zunächst über Microsofts Buchsuchprojekt recherchierbar sein. Alle Abbildungen sind mit Herkunftsangaben und dem Erscheinungsjahr versehen. Im nächsten Schritt plant die British Library ein Crowdsourcing-Projekt, um die Bilder automatisch inhaltlich zu klassifizieren. Die Daten zu den Bildern hat die British Library auf Github bereitgestellt. Der Code soll unter eine offene Lizenz gestellt werden.
- Source
- http://www.heise.de/newsticker/meldung/British-Library-stellt-ueber-eine-Million-gemeinfreie-Bilder-in-Netz-2066464.html
-
Lepsky, K.; Müller, T.; Wille, J.: Metadata improvement for image information retrieval (2010)
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- Source
- Paradigms and conceptual systems in knowledge organization: Proceedings of the Eleventh International ISKO Conference, 23-26 February 2010 Rome, Italy. Edited by Claudio Gnoli and Fulvio Mazzocchi
-
Iyer, H.; Rorissa, A.: Representative images for browsing large image collections : a cognitive perspective
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- Source
- Paradigms and conceptual systems in knowledge organization: Proceedings of the Eleventh International ISKO conference, Rome, 23-26 February 2010, ed. Claudio Gnoli, Indeks, Frankfurt M
-
Lee, C.-Y.; Soo, V.-W.: ¬The conflict detection and resolution in knowledge merging for image annotation (2006)
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- Date
- 26.12.2007 18:29:29
-
Drolshagen, J.A.: Pictorial representation of quilts from the underground railroad (2005)
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- Abstract
- The Underground Railroad was a network of people who helped fugitive slaves escape to the North and Canada during the U.S. Civil War period, beginning in about 1831. Quilting was used as a form of information representation (Breneman 2001). This simple classification was designed to relate the symbolic transmission of escape routes and locations of sanctuary. Because it was for use in a children's library, symbolic representations were used to anchor the classes. Symbols are based in the African graphic arts, the Adinkra symbols of Ghana (West African wisdom. 2001), and also from actual quilt practice (Threads of Freedom 2001 and Breneman 2001).
-
Bredekamp, H.: Theorie des Bildakts : über das Lebensrecht des Bildes (2005)
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- Footnote
- Rez. in: Frankfurter Rundschau. Nr.298 vom 23.12.2010, S.29 (Scalla, M.: Bilder sehen Dich an).
-
Scalla, M.: Bilder sehen Dich an : Horst Bredekamp auf den Spuren von Max Horkheimer und Theodor W. Adorno (2005)
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- Source
- Frankfurter Rundschau. Nr.298 vom 23.12.2010, S.29
-
Scalla, M.: Auf der Phantom-Spur : Georges Didi-Hubermans neues Standardwerk über Aby Warburg (2006)
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- Date
- 6. 1.2011 11:22:12
