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| Iyengar, S. S. | 2 |
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Peer reviewedZachary, John; Iyengar, S. S. – Journal of the American Society for Information Science and Technology, 2001
Content-based image retrieval is based on the idea of extracting visual features from images and using them to index images in a database. Proposes similarity measures and an indexing algorithm based on information theory that permits an image to be represented as a single number. When used in conjunction with vectors, this method displays…
Descriptors: Indexes, Indexing, Information Retrieval, Information Theory
Peer reviewedZachary, John; Iyengar, S. S.; Barhen, Jacob – Journal of the American Society for Information Science and Technology, 2001
Proposes an alternative real valued representation of color based on the information theoretic concept of entropy. A theoretical presentation of image entropy is accompanied by a practical description of the merits and limitations of image entropy compared to color histograms. Results suggest that image entropy is a promising approach to image…
Descriptors: Color, Entropy, Information Retrieval, Information Systems
Peer reviewedKim, Won; Wilbur, W. John – Journal of the American Society for Information Science and Technology, 2001
Presents three different statistical techniques for identifying content-bearing phrases within a natural language database. Describes results on the effectiveness of the scoring methods when applied to MEDLINE phrases, and how the three methods can be combined to improve performance. Processing results for an example document are provided.…
Descriptors: Data Processing, Databases, Document Delivery, Indexing
Peer reviewedWeeber, Marc; Klein, Henny; de Jong-van den Berg, Lolkje T. W.; Vos, Rein – Journal of the American Society for Information Science and Technology, 2001
Proposes a two-step model of discovery in which new scientific hypotheses can be generated and subsequently tested. Applying advanced natural language processing techniques to find biomedical concepts in text, the model is implemented in a versatile interactive discovery support tool. This tool is used to successfully simulate Don R. Swanson's…
Descriptors: Biomedicine, Discovery Processes, Information Retrieval, Information Systems
Peer reviewedFritch, John W.; Cromwell, Robert L. – Journal of the American Society for Information Science and Technology, 2001
Traditional methods of authority present in a print environment are lacking on the Internet, and, even when occasionally present, are of questionable veracity. A formal model and evaluative criteria are suggested and explained to provide a means for accurately ascribing cognitive authority in a networked environment; the model is unique in its…
Descriptors: Computer Networks, Evaluation Criteria, Evaluation Methods, Information Networks
