Digital Imaging Processing
Mostrando 1-12 de 28 artigos, teses e dissertações.
-
1. CLASS-BASED AFFINITY PROPAGATION FOR HYPERSPECTRAL IMAGE DIMENSIONALITY REDUCTION AND IMPROVEMENT OF MAXIMUM LIKELIHOOD CLASSIFICATION ACCURACY
Resumo Este artigo investiga um método de classificação alternativo que integra o algoritmo de clusterização propagação de afinidade baseado nas classes (PAC) e o Classificador Máxima Verossimilhança (MAXVER) com a finalidade de superar as limitações do MAXVER na classificação de dados de alta dimensionalidade e, assim, melhorar a sua acurácia.
Bol. Ciênc. Geod.. Publicado em: 18/04/2019
-
2. Reticular pattern detection in dermoscopy: an approach using Curvelet Transform
Abstract Introduction Dermoscopy is a non-invasive in vivo imaging technique, used in dermatology in feature identification, among pigmented melanocytic neoplasms, from suspicious skin lesions. Often, in the skin exam is possible to ascertain markers, whose identification and proper characterization is difficult, even when it is used a magnifying lens and a
Res. Biomed. Eng.. Publicado em: 07/07/2016
-
3. A flexible multichannel FPGA and PC-Based ultrasound system for medical imaging research: initial phantom experiments
IntroductionIn this paper, we present the initial results of a fully programmable 128-channel FPGA and PC-based system that has been developed for medical ultrasound (US) imaging research in our University laboratory (Federal University of Technology - Paraná, Brazil).MethodsIn order to demonstrate the feasibility of the US research system, two applications
Res. Biomed. Eng.. Publicado em: 29/09/2015
-
4. Aplicação da codificação ROI e WT para compressão de imagens DICOM-CT / Aplication of the ROI coding and WT for compression DICOM-CT images
O armazenamento e a transmissão de grande quantidade de imagens médicas constituem um campo ativo de pesquisa. Dispositivos de imagem geram muitos dados por paciente. Além disso, deve-se prover armazenamento de longo prazo bem como uma transmissão eficiente. Esquemas de compressão atuais produzem taxas de compressão elevadas e com perda de qualidade. U
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
-
5. Electronic Simulator of the PLATO Satellite Imaging System
Abstract: This paper described an architecture that is able to emulate the behavior of the imaging transfer system proposed for the PLATO satellite - PLAnetary transits and oscillations of stars. It was conceived to accurately represent flight operation as to validate the satellite digital processing unit on its development phase. Details related to the miss
J. Aerosp. Technol. Manag.. Publicado em: 2012-12
-
6. Segmentação das áreas isquêmicas no acidente vascular cerebral utilizando imagens de tomografia computadorizada de perfusão / Segmentation of ischemic areas in stroke using perfusion computed tomography images
The techniques of digital image processing have been widely applied to medical imaging. One of the benefits brought about by these tools is to provide measurements of parameters that are difficult to estimate and likely to bias the physician. This study aimed to develop semi-automatic software of segmentation of the ischemic areas, core and penumbra in strok
Publicado em: 2011
-
7. Multi-channel azimuth processing in SAR images with emphasis on channel balancing alternatives.
Due to the widespread acceptance of Synthetic Aperture Radar (SAR) imagery by the scientific community in recent years, SAR system design faces ever increasing demands for wide coverage of high resolution images. This represents a challenging task, since conventional monostatic SAR system are inherently subject to a compromise between the achievable resoluti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2010
-
8. Multi-channel azimuth processing in SAR images with emphasis on channel balancing alternatives.
Due to the widespread acceptance of Synthetic Aperture Radar (SAR) imagery by the scientific community in recent years, SAR system design faces ever increasing demands for wide coverage of high resolution images. This represents a challenging task, since conventional monostatic SAR system are inherently subject to a compromise between the achievable resoluti
Publicado em: 2010
-
9. Radiographic image analysis of apicetomized roots irradiated with Nd:YAG laser using imaging processing of direct digital radiographs / Análise da imagem radiográfica de raízes apicetomizadas e irradiadas com laser de Nd:YAG por meio do processamento de imagem de radiografias digitais diretas
In this research, we carried out an evaluation of the digital radiographic image of dental root-ends irradiated with Neodymium Yttrium Aluminum Garnet (Nd:YAG) laser after apical resection. With the intention of founding alterations in the digital radiographic image of the roots caused by laser irradiation, we developed an in vitro experimental model. We mad
Publicado em: 2009
-
10. Mapeamento de areas de cafe no municipio de Guaxupe/MG por meio de processamento digital de imagens Landsat / Coffee crop areas mapping in mountain relief through Principals Components Analysis
The economic importance of Brazilian coffee growing in the world market is notorious and makes up significant portion of the country s foreign trade exports. Minas Gerais stands out as the core of Brazilian coffee growing, with most of the planting areas (Coffea arabica) concentrated in the south, where it is grown in small plots widely spread throughout the
Publicado em: 2009
-
11. Métodos para aproximação poligonal e o desenvolvimento de extratores de características de forma a partir da função tangencial
Whereas manually drawn contours could contain artifacts related to hand tremor, automatically detected contours could contain noise and inaccuracies due to limitations or errors in the procedures for the detection and segmentation of the related regions. To improve the further step of description, modeling procedures are desired to eliminate the artifacts in
Publicado em: 2008
-
12. Sensoriamento remoto aplicado na analise da cobertura vegetal das reservas de desenvolvimento sustentavel Amana e Mamiraua / Remote sensing applied in vegetation analysis of Amana and Mamiraua sustainable-use protected areas
The knowledge of the Amazon biodiversity, especially that related to its vegetation cover, has been the subject of several studies involving the investigation of its ecological-evolutional processes and its dynamics as an integrated and complex set of biological units. The development of Remote Sensing technologies and methodologies is becoming increasingly
Publicado em: 2008