Detection Of Edges
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Extração de linhas de imagens de sensoriamento remoto. / Extraction of lines of images of remote sensing.
Essa dissertação tem o objetivo de verificar a contribuição de diferentes abordagens para extração de linhas, à classificação de imagens multiespectrais, com o possível uso na discriminação e mapeamento de classes de cobertura da terra. Nesse contexto, é efetuada a comparação entre diferentes técnicas de extração de características para ex
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/10/2012
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2. Adaptive image denoising using scale and space consistency
This paper proposes a new method for image denoising with edge preservation, based on image multiresolution decomposition by a redundant wavelet transform. In our approach, edges are implicitly located and preserved in the wavelet domain, whilst image noise is filtered out. At each resolution level, the image edges are estimated by gradient magnitudes (obtai
Publicado em: 2011
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3. Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento
Bulk and supported molybdenum based catalysts, modified by nickel, phosphorous or tungsten were studied by NEXAFS spectroscopy at the Mo L III and L II edges. The techniques of principal component analysis (PCA) together with a linear combination analysis (LCA) allowed the detection and quantification of molybdenum atoms in two different coordination states
Química Nova. Publicado em: 2010
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4. Segmentação de imagens ultrassonográficas para detecção de nódulos / Segmentation of ultrasound images to detect nodules
Breast cancer is one of the main health problems of the female population and should be faced as an important public health care issue. The ultrasound scanning is considered the most effective in complementary method of breast diagnosis. Nevertheless, the acquisition format of this sort degrades the images in various ways, being the speckle noise of noticeab
Publicado em: 2010
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5. Map quality evaluation and edge extraction of off-terrain objects on airbone laser scanner products. / Avaliação de qualidade cartográfica e extração de bordas de objetos não pertencentes ao terreno em produtos gerados pelo sistema de varredura a laser aerotransportado.
The airborne LASER scanner is competitive technology for surveys that generates digital surface models (DSM) and Digital Terrain Models (DTM). This technology suffered some resistance by the aerosurvey enterprise (and some users), but is conquering its market share due the amount of papers recently published in this field. A limitation associated with this t
Publicado em: 2009
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6. Utilização de equações diferenciais parciais para eliminação de ruídos e detecção de bordas
The edge detection of digital images is a research field that has attracted great interest from the scientific community. Their applications go from the automatic inspection and quality control of industrial piece to the diagnosis of malignancy of cancerous tumors. However, many existing edge detectors have problems related to false edge detection. In this c
Publicado em: 2008
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7. Non-parametric edge detection in speckled imagery
This thesis proposes a non-parametric technique for boundary detection in speckled imagery. Synthetic Aperture Radar (SAR), sonar, B-ultrasound and laser imagery is corrupted by a signal-dependent non-additive noise called speckle. Several statistical models have been proposed to describe such a noise, thus of specialized techniques for image improvement and
Publicado em: 2008
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8. SEGMENTING TECHNIQUES OF IMAGES IN THE GENERATION OF PROGRAMS FOR MACHINERY OF COMMAND NUMERICAL / TÉCNICAS DE SEGMENTAÇÃO DE IMAGENS NA GERAÇÃO DE PROGRAMAS PARA MÁQUINAS DE COMANDO NUMÉRICO
This work describes a tool for extraction of features in 2D images applied to industrial automation. The method uses techniques implemented targeting of images into pieces model as detection of edges in the extraction of spatial coordinates of the image and import applications in CAD (Computer-Aided Design) for the generation of programmers for Computer Nume
Publicado em: 2008
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9. Caracterização morfológica e bioquímica de isolados de Clavibacter michiganensis subsp. michiganensis e avaliação de meios semi-seletivos para sua detecção / Morphological and biochemical characterization of Clavibacter michiganensis subsp. michiganensis and evaluation of semi- selective media for its detection
Six semi-selective media used for detection of Clavibacter michiganensis subsp. michiganensis (Cmm), developed elsewhere and reported in international literature, were evaluated for their efficacy to recover 20 Cmm isolates collected in different regions of Brazil. From these, only MB1M, D2ANX, and KBT allowed the growth of Cmm isolates, thus indicating diff
Publicado em: 2008
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10. Desenvolvimento embriológico e fetal em pacas (Agouti paca, Linnaeus 1766): estabelecimento de modelo experimental análogo murino para detecção de linhagens "Germ Cells" / Development of embryonic and fetal of pacas (Agouti paca, Linnaeus 1766): establishment of experimental model analogous to murine "Germ cells" linage detection
The study aimed elucidates the development of embryonic and fetal of pacas (Agouti paca) and demarcation of the germ sites in embryos at different stages. Seven specimens were used; two embryos and three fetuses from UNESP- Jaboticabal and other two fetuses were from FMVZ-USP collection. The fetuses 1 and 2 showed immaturity facial sharp, eyes covered by a l
Publicado em: 2007
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11. Avaliação de impactos ambientais por estudo geoquímico na Bacia do Córrego Rico, Paracatu - MG
The present work has as objective to carry through water and sediments quality analyses of the Rico Stream and with this, recognize and quantify the main anthropical interventions in the area, mainly the deposition of domestic sewer without treatment and the clandestine gold washer activity. The study region is located near the Paracatu city, in the northwes
Publicado em: 2007
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12. Gesture recognizing using segmentation of dynamic hand image based on the mixture of Gaussians model and skin color / Reconhecimento de gestos usando segmentação de imagens dinâmicas de mãos baseada no modelo de mistura de gaussianas e cor de pele
The purpose of this paper is to develop a methodology able to recognize hand gestures from dynamic images to interact with systems. After the image capture segmentation takes place where pixels belonging to the hands are separated from the background based on skin-color segmentation and background extraction. The image preprocessing can be applied before the
Publicado em: 2006