Contours Detection
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Disruptive coloration and habitat use by seahorses
RESUMO Evitar a predação é um dos principais fatores que influenciam a sobrevivência. Portanto, qualquer traço que afete o risco de predação, como a camuflagem, deverá estar sob forte pressão de seleção. Confundir-se com a cor do fundo (homocromia) limita o uso do habitat, especialmente se ele é heterogêneo. Outro mecanismo de camuflagem é a co
Neotrop. ichthyol.. Publicado em: 02/12/2019
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2. Robust pulmonary segmentation for chest radiography, combining enhancement, adaptive morphology and innovative active contours
Abstract Introduction Statistical data reveal that approximately 140 million radiological exams are performed annually in Brazil. These exams are designed to detect and to analyze fractures, caused by different types of trauma; as well as, to diagnose pathologies such as pulmonary diseases. For better visualization of those lesions or abnormalities, method
Res. Biomed. Eng.. Publicado em: 13/09/2018
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3. Detecção de ovos de S. mansoni a partir da detecção de seus contornos / Schistosoma mansoni egg detection from contours detection
Schistosoma mansoni é o parasita causador da esquistossomose mansônica que, de acordo com o Ministério da Saúde do Brasil, afeta atualmente vários milhões de pessoas no país. Uma das formas de diagnóstico da esquistossomose é a detecção de ovos do parasita através da análise de lâminas microscópicas com material fecal. Esta tarefa é extremame
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2012
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4. Detecção de mudanças a partir de imagens de fração
Land cover change detection is a major goal in multitemporal remote sensing applications. It is well known that images acquired on different dates tend to be highly influenced by radiometric differences and registration problems. Using fraction images, obtained from the linear model of spectral mixing (LMSM), radiometric problems can be minimized and the int
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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5. Intravascular ultrasound: tridimensional quantification and analysis / Análise e quantificação tridimensional em imagens de ultra-som intravascular
INTRODUCTION: Several efforts for in vivo atherosclerotic plaque estimation has been realized worldwide. Current methods for related application are based on spectral analysis of backscattered ultrasound signals before intravascular image formation (IVUS), once there is not available techniques to perform composition analysis only from IVUS images. On this s
Publicado em: 2009
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6. AnÃlise de imagens tÃrmicas geradas por cÃmera de termovisÃo no estudo isoladores de compÃsitos em linhas de transmissÃo
Estudos de Sensoriamento Remoto na faixa espectral do infravermelho termal (8 a 14 micrometros) permitem anÃlises qualitativa e/ou quantitativa atravÃs de imagens termais da distribuiÃÃo de temperatura superficial de objetos. A termografia por infravermelho pode ser dividida em dois tipos de termografia: a ativa e a passiva. Na passiva os imageamentos te
Publicado em: 2009
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7. 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
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8. A closed curve is much more than an incomplete one: effect of closure in figure-ground segmentation.
Detection of fragmented closed contours against a cluttered background occurs much beyond the local coherence distance (maximal separation between segments) of nonclosed contours. This implies that the extent of interaction between locally connected detectors is boosted according to the global stimulus structure. We further show that detection of a target pr
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9. Flexible Learning of Natural Statistics in the Human Brain
The ability to detect and identify targets in cluttered scenes is a critical skill for survival and interactions. To solve this challenge the brain has optimized mechanisms for capitalizing on frequently occurring regularities in the environment. Although evolution and development have been suggested to shape the brain's architecture in a manner that resembl
American Physiological Society.
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10. Contributions of human long-wave and middle-wave cones to motion detection.
1. It has been suggested that motion may be best detected by the luminance mechanism. If this is the most sensitive mechanism, motion thresholds may be used to isolate the luminance mechanism and study its properties. 2. A moving (1 cycle deg-1), vertical, heterochromatic (red-plus-green), foveal grating was presented on a bright yellow (577 nm wavelength) f