Similarity Query
Mostrando 13-24 de 60 artigos, teses e dissertações.
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13. Análise da influência de funções de distância para o processamento de consultas por similaridade em recuperação de imagens por conteúdo / Analysis of the influence of distance functions to answer similarity queries in content-based image retrieval.
The retrieval of images by visual content relies on a feature extractor to provide the most meaningful intrinsic characteristics (features) from the data, and a distance function to quantify the similarity between them. A challenge in this field supporting content-based image retrieval (CBIR) to answer similarity queries is how to best integrate these two ke
Publicado em: 2008
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14. Evaluating human-computer interaction techniques for content-based image retrieval systems through a case study / Análise e avaliação de técnicas de interação humano-computador para sistemas de recuperação de imagens por conteúdo baseadas em estudo de caso
The content-based image retrieval (CBIR) is a challenging area of the computer science that has been growing in a very fast pace in the last years. CBIR systems employ techniques for extracting features from the images, composing the features vectores, and store them together with the images in data bases management system, allowing indexing and querying. CB
Publicado em: 2007
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15. DBM-Tree: trading height-balancing for performance in metric access methods
Metric Access Methods (MAM) are employed to accelerate the processing of similarity queries, such as the range and the k-nearest neighbor queries. Current methods, such as the Slim-tree and the M-tree, improve the query performance minimizing the number of disk accesses, keeping a constant height of the structures stored on disks (height-balanced trees). How
Journal of the Brazilian Computer Society. Publicado em: 2006-04
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16. Management System of the Image Server to Environment Hospitalar with Content-Based Image Retrieval Support. / Sistema de gerenciamento de imagens para ambiente hospitalar com suporte à recuperação de imagens baseada em conteúdo
This work introduces an the development of a server of medical images with the implementation and integration of modules to query/retrieve text information and content-based to Radiology Service of Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto (HCFMRP) at Universidade de São Paulo (USP). The system allows the acquisition, management, ar
Publicado em: 2006
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17. Operadores binários para consulta de similaridade em banco de dados multimídia / Binary operators in multimidia data base
The present databases managers are not adequated for complex data manipulation and among them we point out the multimedia data that to speed up the query use the equality operation on the index structure. Equality operations are not much used in operations that involve complex data sence the presence of two elements extremely equal is rare. An operator class
Publicado em: 2006
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18. Indexing complex data in Generic Metric Domains. / Indexação de dados em domínios métricos generalizáveis
The DBMS were developed to manipulate data in numeric domains and short strings, not considering the manipulation of complex data, like multimidia data. The operators em data domain which requests for the total order property have no use to handle complex data. An operator class that fit well to handle this type of data are the similarity operators: range qu
Publicado em: 2005
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19. Efficient algorithms to execute complex similarity queries in RDBMS
Search operations in large sets of complex objects usually rely on similarity-based criteria, due to the lack of other general properties that could be used to compare the objects, such as the total order relationship, or even the equality relationship between pairs of objects, commonly used with data in numeric or short texts domains. Therefore, similarity
Journal of the Brazilian Computer Society. Publicado em: 2004-04
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20. Um modelo para recuperação por conteudo de imagens de sensoriamento remoto
Content-based retrieval of images is a topic of growing interest given us multiple applications. One kind of images that have not yet been dealt with satisfactorily are the so-called Remote Sensing Images. Remote Sensing Images (RSI) are a especial type of image, created by combination of sensoring on different spectral bands . This work deals with the probl
Publicado em: 2002
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21. FoldMiner and LOCK 2: protein structure comparison and motif discovery on the web
The FoldMiner web server (http://foldminer.stanford.edu/) provides remote access to methods for protein structure alignment and unsupervised motif discovery. FoldMiner is unique among such algorithms in that it improves both the motif definition and the sensitivity of a structural similarity search by combining the search and motif discovery methods and usin
Oxford University Press.
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22. FATCAT: a web server for flexible structure comparison and structure similarity searching
Protein structure comparison, an important problem in structural biology, has two main applications: (i) comparing two protein structures in order to identify the similarities and differences between them, and (ii) searching for structures similar to a query structure. Many web-based resources for both applications are available, but all are based on rigid s
Oxford University Press.
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23. Panning for Genes—A Visual Strategy for Identifying Novel Gene Orthologs and Paralogs
We have developed a rapid visual method for identifying novel members of gene families. Starting with an evolutionary tree, 20–50 protein query sequences for a gene family are selected from different branches of the tree. These query sequences are used to search the GenBank and expressed sequence tag (EST) DNA databases and their nightly updates using the
Cold Spring Harbor Laboratory Press.
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24. Rapid similarity searches of nucleic acid and protein data banks.
With the development of large data banks of protein and nucleic acid sequences, the need for efficient methods of searching such banks for sequences similar to a given sequence has become evident. We present an algorithm for the global comparison of sequences based on matching k-tuples of sequence elements for a fixed k. The method results in substantial red