Content-based retrieval of multimedia data has been still an active research area. The efficient retrieval of video data is proven a difficult task for content-based video retrieval systems. In this thesis study, a Content-Based Video Retrieval (CBVR) system that adapts two different index structures, namely Slim-Tree and BitMatrix, for efficiently retrieving videos based on low-level features such as color, texture, shape and motion is presented. The system represents low-level features of video data with MPEG-7 Descriptors extracted from video shots by using MPEG-7 reference software and stored in a native XML database. The low-level descriptors used in the study are Color Layout (CL), Dominant Color (DC), Edge Histogram (EH), Region Shape (RS) and Motion Activity (MA). Ordered Weighted Averaging (OWA) operator in Slim-Tree and BitMatrix aggregates these features to find final similarity between any two objects. The system supports three different types of queries: exact match queries, k-NN queries and range queries. The experiments included in this study are in terms of index construction, index update, query response time and retrieval efficiency using ANMRR performance metric and precision/recall scores. The experimental results show that using BitMatrix along with Ordered Weighted Averaging method is superior in content-based video retrieval systems.

Orientadores: Mario Jino, Silvia Regina Vergilio / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-09T21:13:12Z (GMT). No. of bitstreams: 1 Emer_MariaClaudiaFigueiredoPereira_D.pdf: 934024 bytes, checksum: dbb2079115b56358ff3dc9e747df6386 (MD5) Previous issue date: 2007 / Resumo: Dados são manipulados em várias aplicações de software envolvendo operações críticas. Em tais aplicações assegurar a qualidade dos dados manipulados é fundamental. Esquemas de dados definem a estrutura lógica e os relacionamentos entre os dados. O teste de esquemas por meio de abordagens, critérios e ferramentas de teste específicos é uma forma pouco explorada de assegurar a qualidade de dados definidos por esquemas. Este trabalho propõe uma abordagem de teste baseada em classes de defeitos comumente identificados em esquemas de dados. Um metamodelo de dados é definido para especificar os esquemas que podem ser testados e as restrições aos dados nos esquemas. Defeitos possíveis de serem revelados são os relacionados à definição incorreta ou ausente de restrições aos dados no esquema. A abordagem inclui a geração automática de um conjunto de teste que contém instâncias de dados e consultas a essas instâncias; as instâncias de dados e as consultas são geradas de acordo com padrões definidos em cada classe de defeito. Experimentos nos contextos de aplicações Web e de base de dados foram realizados para ilustrar a aplicação da abordagem / Abstract: Data are used in several software applications involving critical operations. In such applications to ensure the quality of the manipulated data is fundamental. Data schemas define the logical structure and the relationships among data. Testing schemas by means of specific testing approaches, criteria and tools has not been explored adequately as a way to ensure the quality of data defined by schemas. This work proposes a testing approach based on fault classes usually identified in data schemas. A data metamodel is defined to specify the schemas that can be tested and the constraints to the data in schemas. This testing approach provides means for revealing faults related to incorrect or absent definition of constraints for the data in the schema. The approach includes the automatic generation of a test set which contains data instances and queries to these instances; the data instances and queries are generated according to patterns defined in each fault class. Experiments in the contexts of Web and database applications were carried out to illustrate the testing approach application / Doutorado / Engenharia de Computação / Doutor em Engenharia Elétrica

The aim of this thesis is to create a client xDB database, which supports visualization and management of XML documents and schemas. The first part deals with the introduction of XML, XML schemas (DTD, XML Schema, RelaxNG, etc.) and contextual technologies. After that the thesis deals with the problem of the XML persistence and it focuses on mapping techniques necessary for an efficient storage in a relational database. The main part is devoted to the design and implementation of client application XML Admin, which is programmed in Java. The application uses the XML:DB interface to communicate with the xDB database. It supports storing XML documents to a collection and the XPath language for querying them. The final section is devoted to application performance testing and comparison with existing native database eXist.

This thesis envisages the possibilities of data transport from portal applications into spreadsheets. The main goal is to find out a solution to export data in suitable form for MS Excel application.   The thesis also shows principles of the OLAP. It describes OLAP internal data model and shows the way, how data could be exported from a website into spreadsheets. It enlarges SYLK and XML file formats, which are suitable for data representation in MS Office Excel spreadsheet.

The aim of this Thesis is implement Aplication Programming Interface (API) with support of XML native documents. First part deal with introduction of XML model and with this markup language related technologies. Alfter that the thesis describe individual XML native databases solutions and focus to issues of persistence XML data stored in relational databases, analyse mapping methods applicable to their relational model. After that the thesis describe design and implementation of the API, which afford a resources for XML documents data holding and manipulating in relational database system. The final section of this thesis is assignment to aplication tests and evaluation of results.

<p>Циљ истраживања реализованих у овом раду, био је да се формално опишу типови ограничења у XML моделу података, по угледу на типове ограничења у релационом моделу података. У складу са постављеним циљем, урађена је класификација типова ограничења у XML моделу података, њихова формална спецификација и имплементација у репрезентативним XML СУБП.</p> / <p>Cilj istraživanja realizovanih u ovom radu, bio je da se formalno opišu tipovi ograničenja u XML modelu podataka, po ugledu na tipove ograničenja u relacionom modelu podataka. U skladu sa postavljenim ciljem, urađena je klasifikacija tipova ograničenja u XML modelu podataka, njihova formalna specifikacija i implementacija u reprezentativnim XML SUBP.</p> / <p>The goal of the research conducted in this thesis was to formally describe the types of the constraints in the XML data model, according to the types of the constraints in the relational data model. In accordance with the set goal, the types of the constraints in the XML data model were classified, formally specified, and implemented in the representative XML DBMS.</p>

XML (eXtensible Markup Language)是今日新興在網路上所使用的延伸性的標記語言。它具有豐富的語意表達及與展現方式獨立的資料獨立性。由於這些特性，使得XML成為新的資料交換標準並且其應用在資料庫中產生了許多新的研究議題在資料儲存和查詢處理上。在本篇研究中，將研究XML資料庫中的績效評估的議題並且發展一個可適用於不同應用領域及各種平台上的使用者導向且開放型工作量模式以評估XML資料庫績效。此XML開放型的工作量模型包含三個子模型─XML資料模型、查詢模型以及控制模型。XML資料模型將模式化XML文件中階層式的結構概念；查詢模型包含了一連串查詢模組以供測試XML資料庫的處理查詢能力以及一個開放型的查詢輸入介面以供使用者依照需求設定所需的測試查詢；控制模型中定義了一連串變數以供設定績效評估系統中的執行環境。我們發展此系統化且具開放型的工作量方法可以幫助各種不同應用領域的使用者預測及展現XML資料庫系統的績效。 / XML (eXtensible Markup Language) is the emerging data format for data processing on the Internet. XML provides a rich data semantics and data independence from the presentation. Thanks to these features, XML becomes a new data exchange standard and leads new storage and query processing issues on database research communities. In this paper, the performance evaluation issues on XML databases have been studied and a generic and requirement-driven XML workload model that is applicable to any application scenario or movable on various platforms is developed. There are three sub-models in this generic workload model, the XML data model, the query model, and the control model. The XML data model formulates the generic hierarchy structure of XML documents and supports a flexible document structure of the test database. The XML query model contains a flexible classical query module selector and an open query input to define the requirement-driven test query model to challenge the XML query processing ability of the XML database. The control model defines variables that are used to set up the implementation of a benchmark. This open, flexible, and systematic workload method permits users in various application domains to predicate or profile the performance of the XML database systems.