Search (6 results, page 1 of 1)

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Abstract

This article presents exploratory research evaluating a conceptual structure for the description of visual content of images. The structure, which was developed from empirical research in several fields (e.g., Computer Science, Psychology, Information Studies, etc.), classifies visual attributes into a "Pyramid" containing four syntactic levels (type/technique, global distribution, local structure, composition), and six semantic levels (generic, specific, and abstract levels of both object and scene, respectively). Various experiments are presented, which address the Pyramid's ability to achieve several tasks: (1) classification of terms describing image attributes generated in a formal and an informal description task, (2) classification of terms that result from a structured approach to indexing, and (3) guidance in the indexing process. Several descriptions, generated by naive users and indexers, are used in experiments that include two image collections: a random Web sample, and a set of news images. To test descriptions generated in a structured setting, an Image Indexing Template (developed independently over several years of this project by one of the authors) was also used. The experiments performed suggest that the Pyramid is conceptually robust (i.e., can accommodate a full range of attributes), and that it can be used to organize visual content for retrieval, to guide the indexing process, and to classify descriptions obtained manually and automatically

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Abstract

General considerations in still image indexing are addressed, and theoretical foundations and major approaches to image indexing among several communities are explained. The most frequently used tools that support this endeavor are discussed. Newer approaches are considered, and major research topics for the future are presented.

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Footnote

Rez. in: KO 31(2004) no.2, S.114-115 (J. Turner): "Professor Corinne Jörgensen's book will be useful to researchers, practitioners, and graduate students working in the area of the management of collections of still images. The book is a fine piece of scholarship that is thoroughly researched and nicely written. It integrates information from a number of perspectives, including cognitive psychology and computer science, into an information science text. This work is timely, since images and other nontextual information are forming an ever larger part of the mass of information available to us. Indeed, in the long history of recorded information an our planet, images "were the only form of written communication for 25,000 out of the 30,000 years of human recorded experience ... we are, it appears, an the hinge of an important historical swing back towards what may be called the primacy of the image" (p. ix). The book will be valued for the richness of the information it gathers and for the intelligent discussion it offers. There are six chapters to the work: 1. Why images, and what do we know about them? 2. Cognitive foundations for image processing; 3. Organizing and providing access to images; 4. Machine processing of images; 5. Image attributes: the research framework; 6. Towards the future. In addition, there is an excellent bibliography of over forty pages, which is valuable because it provides so many good leads into the literatures of information science and of related disciplines that contribute to the discussions of image retrieval presented in the book. There are separate subject and author indexes. The author index is considerably longer than the subject index, an indication of how muck published literature is discussed in the text. Finally, a list of figures and a list of tables provide additional finding aids. The inclusion of discussions of issues from disciplines other than information science reflects the changing reality of information systems for managing picture collections. Throughout the time such collections have been built, there has never been much coordination of approaches, methods, or practices, even within the discipline of information science. Since the arrival about ten years ago of the World Wide Web, major changes have taken place in the way information is organised, stored, and retrieved. The new networked environment requires a great deal of coordination, common standards, and much more uniform practices than managers of collections of pictures have been used to in the past. Jörgensen's extensive research into the work accomplished by a number of contributing disciplines and her presentation of it in relation to the problem of managing collections of images indicates a deep understanding of the issues and a remarkable capacity to relate them to issues in information science. Accomplishing such a feat so successfully makes this work a valuable contribution to the ongoing discussion of how collections need to be managed in the networked environment. The interdisciplinary nature of the problem has never before been presented so clearly, nor so thoroughly.
The discussion of available tools is excellent and quite comprehensive. This will prove very helpful to practitioners and students setting out to learn about the world of storage, retrieval, and indexing of images. The author's simple, straightforward writing style is praiseworthy, since it will help those just starting out in the field to grasp the material quickly. It will also contribute to understanding an the part of readers from other language communities who have English as a second language. Although this book discusses a number of complex topics, the author has succeeded in making the treatment of them eminently understandable. Chapter 6 will prove particularly useful to researchers in the area, many more of whom are needed, and especially to graduate students thinking about undertaking a doctoral programme in the area of image management. The author provides a research agenda which describes a number of areas in which research is needed, including a number of research questions to work on. She also includes her wish list, which "represents a personal perspective, and is offered ... as food for thought and future discussion" (p. 267). Jörgensen feels her book will soon be out of date, and indeed, that in writing the book she has been "pursuing a moving target" (p. 4). Since there is so muck work going an in the broad field of image retrieval (although not enough in the area of information science), new discoveries will be made, new issues we hadn't thought about before will come to light, new methods and standards for managing picture databases will be developed, and new approaches will surely come along. However, I'm not so sure this book will be out of date any time soon, since it serves as a record of arriving at a plateau, a point at which the knowledge accumulated to date has been gathered, recorded, and presented as a portrait of what has been achieved and of where we are now. At the very least, then, Jörgensen's book will remain as a solid record of the research to date. More immediately, it will serve as a guide to what we should be doing now, and to the next steps that need to be taken."

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Abstract

The potential impact of the Internet an the public's Jemand for the services and resources of public libraries is an issue of critical importance. The research reported in this article provides baseline data concerning the evolving relationship between the public's use of the library and its use of the Internet. The authors developed a consumer model of the American adult market for information services and resources, segmented by use (or nonuse) of the public library and by access (or lack of access) to, and use (or nonuse) of, the Internet. A national Random Digit Dialing telephone survey collected data to estimate the size of each of six market segments, and to describe their usage choices between the public library and the Internet. The analyses presented in this article provide estimates of the size and demographics of each of the market segments; describe why people are currently using the public library and the Internet; identify the decision criteria people use in their choices of which provider to use; identify areas in which libraries and the Internet appear to be competing and areas in which they appear to be complementary; and identify reasons why people choose not to use the public library and/or the Internet. The data suggest that some differentiation between the library and the Internet is taking place, which may very well have an impact an consumer choices between the two. Longitudinal research is necessary to fully reveal trends in these usage choices, which have implications for all types of libraries in planning and policy development.

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Abstract

This article reports the analysis of two samples of search logs from a commercial image provider over a 1-month period. The study analyzes image searches and queries, user query modification strategies, and user browsing and downloading of results. Unique term searches are less frequent than earlier research has shown; descriptive and thematic queries are more common. Boolean searching, although heavily employed, appears to be ineffective and leads to query modifications. Although there was a large amount of query modification (61.7% of queries across the two sampies), the tactics overall do not appear to be carefully thought out and seem to be largely experimental. Given the willingness to modify queries but the inability to do so in an effective way, more support for query modification may be beneficial.

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Abstract

Metadata describing multimedia can address a wide variety of purposes, from the purely physical characteristics of an item, to the circumstances surrounding its production, to attributes that cannot necessarily be determined by examining the item itself directly. These latter attributes, often dealing with "meaning" or interpretation of an item's content, are frequently deemed too difficult to determine and subject to individual and cultural variability. At the same time, however, research has shown that these abstract, interpretive attributes, which carry meaning, are frequently the ones for which people search. To describe an item fully, therefore, means to describe it at both the "syntactic" and the "semantic" levels. This article discusses the development of the semantic description schemes within the MPEG-7 standard from both a historical and an intellectual perspective, as well as the difficulties inherent in creating a descriptive schema that can fully capture the complexity of "narrative worlds."