High Dimensional Image Data
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. The delusional dimension of anorexia nervosa: phenomenological, neurobiological and clinical perspectives
Abstract Background Delusional characteristics have been largely ignored in patients suffering from anorexia nervosa (AN). Objectives To review the literature on delusional features in AN from phenomenological, neurobiological, and clinical viewpoints. Methods Data were obtained through searches of Medline, PubMed, SciELO and Cochrane Library. Results Di
Arch. Clin. Psychiatry (São Paulo). Publicado em: 2018-02
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2. Interferência dos artefatos de imagem causados por acessórios ortodônticos metálicos em sobreposições de imagens de TCFC / Influence of streaking artifacts due to metallic orthodontic accessories in CBCT 3D model superimposition
The aim of this study was to determine whether the artifacts caused by orthodontic metallic accessories interfere with the accuracy of three-dimensional (3D) Cone Beam Computed Tomography (CBCT) model superimposition. Ten dry human skulls were subjected to 3 CBCT scans: without orthodontic brackets (T1), with stainless steel brackets bonded (T2) and with ort
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/07/2012
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3. ProspecÃÃo de proteÃnas envolvidas no amadurecimento pÃs-colheita da graviola (Annona muricata L.) / Prospecting for proteins involved in post-harvest ripening of soursop (Annona muricata L.)
The soursop (Annona muricata L.) fruit is widely used in food, because it provides vitamins, carbohydrates, proteins, lipids and other molecules for human nutrition. In recent years, soursop (exotic tropical fruit) has had a prominent position in the Brazilian economy, especially for northeastern states such as, Ceara, Alagoas, Bahia and Pernambuco. The high
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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4. On the classification of classes with nearly equal spectral response in remote sensing hyperspectral image data
It is well known that high-dimensional image data allows for the separation of classes that are spectrally very similar, i.e., possess nearly equal first-order statistics, provided that their second-order statistics differ significantly. The aim of this study is to contribute to a better understanding, from a more geometrically oriented point of view, of the
Publicado em: 2011
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5. Análise de dados de altas dimensões
O avanço tecnológico vem permitindo que novas áreas da ciência se desenvolvam e, com isso, novas técnicas começam a surgir. Problemas antes considerados sem solução passam a ser resolvidos computacionalmente. E isto não é diferente na estatística. Bancos de dados cada vez maiores vem surgindo e, com isso, surgem dados com altas dimensões. Áreas
Publicado em: 2010
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6. Support vector machines na classificação de imagens hiperespectrais / Hyperspectral image classification with support vector machines
É de conhecimento geral que, em alguns casos, as classes são espectralmente muito similares e que não é possível separá-las usando dados convencionais em baixa dimensionalidade. Entretanto, estas classes podem ser separáveis com um alto grau de acurácia em espaço de alta dimensão. Por outro lado, classificação de dados em alta dimensionalidade po
Publicado em: 2009
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7. Evaluation of optimal and suboptimal feature selection methods applied to image textures / Avaliação de métodos ótimos e subótimos de seleção de características de texturas em imagens
Texture features are eficient image descriptors and can be employed in a wide range of applications, such as classification and segmentation. However, when the number of features is considerably high, pattern recognition tasks may be compromised. Feature selection helps prevent this problem, as it can be used to reduce data dimensionality and reveal features
Publicado em: 2008
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8. Investigation of gravity wave momentum fluxes in the upper atmosphere derived from airlow / Investigação do fluxo de momento das ondas de gravidade na alta atmosfera através da aeroluminescência
In this study, momentum fluxes due to gravity wave propagation into the MLT region was calculated by using airglow image data and theoretical modeling. Airglow O(1S) 557,7, O2(0-1,b) and OH NIR images were obtained from Cachoeira Paulista (22,7°S; 45,0°W) and São João do Cariri (7,4°S; 36,6°W) and processed for estimation of gravity wave intrinsic para
Publicado em: 2007
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9. Análise de conteúdo de vídeo por meio de aprendizado ativo
Advances in compression techniques, decreasing cost of storage, and high-speed transmission have facilitated the way videos are created, stored and distributed. As a consequence, videos are now being used in many applications areas. The increase in the amount of video data deployed and used in today s applications reveals not only the importance as multimedi
Publicado em: 2007
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10. Aplicação de métodos tomográficos na reconstrução bi-dimensional de propriedades de chamas / Application of the tomographyc methods on bidimensional reconstruction of the flame properties
Fundamentally, flame diagnosis by tomographic imaging deals with reconstructing an image from its projections. In the strict sense of the word, a projection at a given angle is the integral of the image in the direction specified by that angle. However, in a loose sense, projection means the information derived from the emitted energies, at some angle, when
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2006
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11. Study of amazon floodplain water composition using hyperion/EO-1 and field reflectance data for the comprehension of temporal variability of optically active constituents / Estudo da composição das águas da planície amazônica por meio de dados de reflectância do sensor hyperion/EO-1 e de espectrômetro de campo visando a compreensão da variação temporal dos seus constituintes opticamente ativos
Two methodological approaches were evaluated to study the reflectance of optically active constituents using hyperspectral imagery of EO-1 Hyperion orbital sensor: a) Linear Spectral Mixture Model; and b) derivative analysis. Two Hyperion images acquired over an area located upstream of the confluence between the Amazon and the Tapajós rivers were analysed,
Publicado em: 2006
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12. Análise de imagens digitais na avaliação de plântulas de milho. / Digital images analysis in corn seedling evaluation.
The image analysis has high potential use in seed vigor determination. Associated to the seedlings growing test, this technique is fast, precise and makes possible the dimensional image analysis. The result is the total extension of each seedling quantifying the length of their constituent parts. With the purpose of studying the corn seed lots vigor through
Publicado em: 2005