866 resultados para Imagens
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Patente de invenção de métodos para processamento de imagens obtidas a partir de amostras preparadas 'cbnforme protocolo para reajízação de teste do cometa, particularmente corado pela prata. Este teste é amplamente utilizado para avaliação de genotoxicidade de substâncias. Há sistemas automatizados que analisam cometas corados por substâncias fluorescentes. A coloração de prata é uma técnica pouco difundida pela falta de tecnologia de análise digital automatizada e tem desempenho semelhante às técnicas com fluorescência, porém, é de baixo custo, rápida execução, não depende de microscópios de fluorescéncia e não utiliza produtos mutagênicos em seu protocolo.
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The objective of this study was to define a method for estimating soybean crop area in the Northern Rio Grande do Sul state (Brazil). Overall, six different remote sensing methods were proposed based on spectral-temporal profile and minimum and maximum values of NDVI/MODIS related to the stages of sowing, maximum development and harvesting of soybean areas. The resulting estimates were compared to official crop area data provided by the Brazilian government, using statistical analysis and the fuzzy similarity method. The performance of each method depended on information such as crop size, type of crop management, and sowing/harvesting dates. Regression coefficients of determination and fuzzy agreement values were above 0.8 and 0.45, respectively, for all methods. For operational monitoring of soybean crop area, the empirical threshold applied to the image difference with inclusion of harvest image method was the most effective, producing estimates that matched closely the official data. For spatial analysis the application of multitemporal images classification method is recommended that generated a map of better quality. The efficiency of these methods should be evaluated in the areas of soybean expansion in the state.
Avaliação de uma técnica para geração de modelos digitais de superfície utilizando múltiplas imagens
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The efficient generation of digital surface model (DSM) from optical images has been explored for many years and the results are dependent on the project characteristics (image resolution, size of overlap between images, among others), of the image matching techniques and the computer capabilities for the image processing. The points generated from image matching have a direct impact on the quality of the DSM and, consequently, influence the need for the costly step of edition. This work aims at assessing experimentally a technique for DSM generation by matching of multiple images (two or more) simultaneously using the vertical line locus method (VLL). The experiments were performed with six images of the urban area of Presidente Prudente/SP, with a ground sample distance (GSD) of approximately 7cm. DSMs of a small area with homogeneous texture, repetitive pattern, moving objects including shadows and trees were generated to assess the quality of the developed procedure. This obtained DSM was compared to cloud points acquired by LASER (Light Amplification by Simulated Emission of Radiation) scanning as wells as with a DSM generated by Leica Photogrammetric Suite (LPS) software. The accomplished results showed that the MDS generated by the implemented technique has a geometric quality compatible with the reference models.
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Pós-graduação em Ciência da Computação - IBILCE
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Pós-graduação em Ciência da Computação - IBILCE
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Este estudo constitui-se de três momentos principais: a reflexão sobre a historiografia literária de Moçambique (apresentada no capítulo um), as considerações a respeito da fortuna crítica acadêmica monográfica de Mia Couto produzida no Brasil (que abordamos no segundo capítulo) e a análise da autointertextualidade na obra ficcional de Mia Couto (matéria que ocupa os capítulos três e quatro)
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Pós-graduação em Agronomia (Energia na Agricultura) - FCA
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Pós-graduação em Engenharia Mecânica - FEIS
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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A discussion, through a literature review, on the use of photographic documents and Documentary Analysis (DA) for the preservation, description and retrieval of images of pilgrimages in northeastern Brazil, which are archived at the Laboratory of Information Science and Memory (LACIM). The photograph acts as an expression of faith and devotion; it is a witnesses and documents, through images, the records of the day-to-day folk religion in its multiple meanings and situations, linked to the sacred. The DA —as a set of procedures performed after the reading of documents— facilitates the analysed collection location or query through the documentary language. This paper tries to show that the particular form of the information contained in a photographic archive echoes submerged memories of the pilgrims, authenticating a social fact in the country, capturing the sacredness from specific moments of celebration.
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Radio Days de Woody Allen est un film de mémoire: le narrateur ressouvient sa enfance et l´influence du radio dans les années 1940 dans le quotidien dans sa famille. Ce film n´est pas une simple reconstitution historique mais un document pour l´histoire, document visuel en potentiel étudié dans les relations cinema, histoire et mémoire. Dans cette perspective l´analyse filmique discute le méthode suggéré par Marc Ferro pour l´analyse du document d´images en mouvement. Le film est, dans nos cas, un écrivain d´histoire et en même temps un support pour la mémoire: mémoire étendu pour Jacques Le Goff et experience collective pour Walter Benjamin.
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The objective of this article was to argue how to use images (as films, photos and paintings) and lyrics of musics (as rap) to teach History of the African and Afro- Brazilian culture in classroom. Demonstrating how the procedures had been worked in classroom, at Municipal School of Basic Education (EMEF) “Maria Pavanatti Favaro”, located in Campinas City, in the State of São Paulo-Brazil, and the results that had been reached with the use of those resources.
Classificação de tábuas de madeira usando processamento de imagens digitais e aprendizado de máquina
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Pós-graduação em Agronomia (Energia na Agricultura) - FCA