Digital Transforms
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Desenvolvimento de um Sistema de Auxílio ao Diagnóstico de Pneumonia na Infância Utilizando Visão Computacional / Development of a System of Aid to the Diagnosis of Pneumonia in Children Using Computer Vision
This work aims to develop a system to aid in the diagnosis of pneumonia by computer, termed pneumocad, which aims to identify chest radiographies compatible with the disease. Techniques were used for the recognition of patterns in textures through the decomposition of the wavelet transforms of the features extracted from the decomposition and classification
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/03/2012
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2. Detecção e classificação de arritmias em eletrocardiogramas usando transformadas wavelets, máquinas de vetores de suporte e rede Bayesiana
The cardiopathies are currently, according the Ministério da Saúde, the second biggest cause of mortality among the Brazilians, behind only the brain vascular diseases. The motivation for the work here presented is the identification and classification of cardiopathies registered in Electrocardiogram exams, ECG, such as premature contractions, branches blo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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3. TV on web: courses of reelaboration of audiovisual genres in the era of transmedia / A TV na web: percursos da reelaboraÃÃo de gÃneros audiovisuais na era da transmÃdia
This research aims to discuss the possibilities of reworking television genres, due to transmedia phenomenon, which takes those genres to digital communication platforms. Accordingly to that, the research tries to capture evidences of change in two television genres â the soap opera and the newscast â in the edge of its migration to YouTube video repositor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/12/2010
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4. TECHNIQUES FOR THE INCREASE OF PERFORMANCE OF FORWARD TRANSFORMS AND MOTION ESTIMATION DEDICATED ARCHITECTURES OF THE H.264/AVC VIDEO CODING STANDARD / TÉCNICAS PARA O AUMENTO DE DESEMPENHO DE ARQUITETURAS DEDICADAS DAS TRANSFORMADAS DIRETAS E DE ESTIMAÇÃO DE MOVIMENTO DO PADRÃO H.264/AVC DE CODIFICAÇÃO DE VÍDEO PELOTAS 2009
The increasing use of digital video on the Internet, devices and also in mobile digital TV has lead to an increasing interest for research in this area, from both industry and academia. This work follows this trend by proposing the investigation of the main aspects of digital video, video compression and also of the H.264/AVC video compression for the implem
Publicado em: 2009
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5. Construction of linear block codes via digital transforms / ConstruÃÃo de cÃdigos de bloco lineares via transformadas digitais
Novas famÃlias de cÃdigos corretores de erros, criados a partir da transformada numÃrica de Fourier (CÃdigos de Fourier) e de transformadas trigonomÃtricas sobre corpos finitos (CÃdigos FFCT tipo 4 par, do inglÃs finite field cosine transform, e CÃdigos FFST tipo 4 par, do inglÃs finite field sine transform), sÃo apresentadas nesta dissertaÃÃo. A
Publicado em: 2009
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6. ConstruÃÃo de cÃdigos de bloco lineares via transformadas digitais
New families of error-correcting codes, created from the Fourier number theoretic transform (Fourier Codes) and from trigonometric transforms over finite fields (FFCT-4e and FFST-4e Codes), are introduced in this dissertation. The code parity-check matrix, its dimension and minimum distance are obtained from the eigenstructure of the unitary Fourier number t
Publicado em: 2009
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7. Use of Wavelet Transforms to Detect Abnormal Frequency Variation in Distributed Generation Systems / Utilização da transformada de Wavelet para detectar variações anormais de freqüência em sistemas de geração distribuída
This dissertation focuses the importance of registering eventual frequency variations in Electric Power System which may cross the established limits for normal operation. These can cause serious problems in the operation of sensitive equipments connected to the electric grid, such as the turbo-generators employed in thermoelectric plants. For power system f
Publicado em: 2009
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8. CollaboraTVware: uma infra-estrutura ciente de contexto para suporte a participação colaborativa no cenário da TV Digital Interativa. / CollaboraTVware: a context-aware infrastructure with support for collaborative participation in an Interactive Digital TV environment.
The advent of the Interactive Digital TV around the world transforms, ultimately, the user experience in watching TV, making it richer mainly by enabling user interactivity. The users become pro-active and begin to interact with very different ways: building virtual communities, discussion about contents, sending messages and recommendations etc. In this sce
Publicado em: 2008
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9. Trigonometria sobre corpos finitos: novas definiÃÃes e cenÃrios de aplicaÃÃo / Finite field trigonometry: new definitions and application scenarios
Nesta tese, sÃo introduzidas novas ferramentas matemÃticas relacionadas à trigonometria sobre corpos finitos e propostos alguns cenÃrios de aplicaÃÃo para as mesmas. O ponto de partida para o trabalho desenvolvido à a inÃdita definiÃÃo das transformadas trigonomÃtricas sobre corpos finitos (FFTT), o que inclui oito transformadas do co-seno (FFCT)
Publicado em: 2008
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10. Caracterização fisica de ambientes carsticos atraves de sensoriamento remoto e SIG : o caso do Parque Nacional Cavernas do Peruaçu - Januaria/ Itacarambi, MG / Characterization of karstic environments by means of remote sensing and GIS : the case of Cavernas do Peruaçu National Park, Januaria/ Itacarambi, Minas Gerais State, Brazil
This dissertation deals with the characterization of karstic environments through the use of remote sensing and GIS techniques, using as a case study the Cavernas do Peruaçu National Park, located in Januária and Itacarambi counties, Minas Gerais State, Brazil. The selection of this area was due to its relevance in terms of the speleological, archeological
Publicado em: 2007
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11. No visgo do improviso ou a peleja virtual entre a cibercultura e tradição: comunicação e mídia digital nas poéticas de oralidade
Cordel literature is poetry born from the oral traditional of Northeast Brazil, known especially for the written production and respective typographic register of the booklets. Both the improvised texts and the booklets pertain to a grand oral text in which poetic diction, cultural universe and, especially, traces of orality converge. Communicational process
Publicado em: 2007
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12. Rich Media e a Publicidade na Era da Interatividade
With the increasing advance of computing technologies, speed, trust and the acuteness of the transmission and reception of messages have become usual in peoples lives, due mainly to powerful communication nets. This scenery suggests changes specially in what concerns Publicity, for the action of communicating advertising appeals seems to indicate the need of
Publicado em: 2006