Read e-book online Automated metadata in multimedia information systems: PDF

By Michael Christel

ISBN-10: 1598297716

ISBN-13: 9781598297713

ISBN-10: 1598297724

ISBN-13: 9781598297720

Advancements in community bandwidth in addition to dramatic drops in electronic garage and processing expenditures have led to the explosive development of multimedia (combinations of textual content, photograph, audio, and video) assets on the web and in electronic repositories. a collection of laptop applied sciences offering speech, photograph, and traditional language knowing can immediately derive descriptive metadata for such assets. problems for finish clients occur, notwithstanding, with the great quantity and ranging caliber of automatic metadata for multimedia details structures. This lecture surveys automated metadata production tools for facing multimedia info assets, utilizing broadcast information, documentaries, and oral histories as examples. ideas for bettering the application of such metadata are mentioned, together with computationally in depth methods, leveraging multimodal redundancy, folding in context, and leaving precision-recall tradeoffs lower than person keep an eye on. Interfaces development from immediately generated metadata are offered, illustrating using video surrogates in multimedia details platforms. conventional details retrieval assessment is mentioned during the annual nationwide Institute of criteria and expertise TRECVID discussion board, with experiments on exploratory seek extending the dialogue past fact-finding to broader, long term seek actions of studying, research, synthesis, and discovery.

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Why or why not? 4. com/). , ALIPR). How might such services let you categorize video at various levels of the Jaimes classification pyramid? • • • • 21 chapter 3 Refinement of Automatic Metadata There are numerous approaches that can be taken to refine automatically produced metadata. , news studio classificaton from classroom lecture videos. One could invest additional human labor to correct automatic speech recognition (ASR) text into a more accurate transcription. The human correction process itself can serve as a form of relevance feedback that can perhaps improve the original metadata creation programs.

For interactive search, the interactive user has no previous knowledge of the search test collection or topics. With this task, the usability ISO 9241 definition becomes: the extent to which a video retrieval system enables users to identify relevant shots from news video efficiently and effectively while promoting feelings of satisfaction. To address ecological validity, the topics are defined by NIST to reflect many of the types of queries real users pose, based on query logs against video corpora such as the BBC Archives and other empirical data [33, 106].

Foraker Design defines ecological validity as follows [98]: Ecological validity—the extent to which the context of a user study matches the context of actual use of a system, such that it is reasonable to suppose that the results of the study are representative of actual usage and that the differences in context are unlikely to impact the conclusions drawn. All factors of how the study is constructed must be considered: how representative are the tasks, the users, the context, and the computer systems?

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Automated metadata in multimedia information systems: creation, refinement, use in surrogates, and evaluation by Michael Christel


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