Camera Positioning
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Analysis of mesiodistal angulations of preadjusted brackets
Manufacturers offer various prescriptions of preadjusted brackets for use in the “straight-wire” orthodontic technique. However, the need to incorporate bends in the rectangular wires during orthodontic finishing has led to concerns regarding the type of prescription chosen and the credibility of information provided by the manufacturer. The aim of this
Braz. oral res.. Publicado em: 21/08/2014
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2. A clinical gamma camera-based pinhole collimated system for high resolution small animal SPECT imaging
The main objective of the present study was to upgrade a clinical gamma camera to obtain high resolution tomographic images of small animal organs. The system is based on a clinical gamma camera to which we have adapted a special-purpose pinhole collimator and a device for positioning and rotating the target based on a computer-controlled step motor. We deve
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-12
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3. Thermographic inspection of impact damage in solid fiber-reinforced polymer matrix composite laminates. / Inspeção termográfica de danos por impacto em laminados compósitos sólidos de matriz polimérica reforçada com fibras de carbono.
Continuous carbon fiber-reinforced thermosetting and thermoplastic composite laminates were exposed to single transversal impact with different energy levels. The damages marked to the structural materials were evaluated by active infrared thermography in transmission mode. In general, the thermoplastic laminate thermograms showed more clear and delineated d
Publicado em: 2010
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4. COMPARAÇÃO ENTRE CONTROLES LOOK-AND-MOVE E SERVO-VISUAL UTILIZANDO TRANSFORMADAS SIFT EM MANIPULADORES DO TIPO EYE-IN-HAND / COMPARISON BETWEEN LOOK-AND-MOVE AND VISUAL SERVO CONTROL USING SIFT TRANSFORMS IN EYE-IN-HAND MANIPULATOR SYSTEMS
Computer vision can be used to calibrate and self-localize robots. There are many applications in self-localization and control applied to industrial manipulators and mobile robots. In particular, visual control can be useful in submarine interventions, where a robotic manipulator is mounted on a Remote Operated Vehicle (ROV) to execute tasks at high depths,
Publicado em: 2009
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5. CAMERA CALIBRATION AND POSITIONING USING PHOTOGRAPHS AND MODELS OF BUILDINGS / CALIBRAÇÃO E POSICIONAMENTO DE CÂMERA UTILIZANDO FOTOS E MODELOS DE EDIFICAÇÕES
A reconstrução de câmera é um dos problemas fundamentais da visão computacional. Sistemas de software desta área utilizam modelos matemáticos de câmera, ou câmeras virtuais, para, por exemplo, interpretar e reconstruir a estrutura tridimensional de uma cena real a partir de fotos e vídeos digitais ou para produzir imagens sintéticas com aparência
Publicado em: 2008
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6. Método de extração da posição de máquinas agrícolas por visão computacional baseado em redes pulsadas e ponto de fuga / Method for position extraction of agricultural machine based on pulsed neural networks and vanishing point
Cost reduction and productive process improvement are essential to increase yield in agricultural areas. Investments in technology become, therefore, important in a competitive world. This work presents a novel approach for extracting agricultural machine position, with respect to crop rows, processing images captured by a color video camera. The correct mac
Publicado em: 2008
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7. Ecologia e história natural do Tatu-peba, Euphractus sexcinctus (Linnaeus, 1758), no Pantanal da Nhecolândia, Mato Grosso do Sul
The general objective of this work was to increase original knowledge about ecology and natural history of the yellow armadillo, Euphractus sexcinctus (Linnaeus, 1758), in the scientific literature. This study was conducted in Nhumirim ranch, an experimental station of the Embrapa Pantanal, located in the Pantanal da Nhecolândia MS, at different intervals f
Publicado em: 2008
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8. Visual servoing system of a pan-tilt camera using region template tracking. / Sistema de controle servo visual de uma câmera pan-tilt com rastreamento de uma região de referência.
A pan-tilt camera can move around two rotational axes (pan and tilt), allowing its lens to be pointed to any point in space. A possible application of the camera is to keep it pointed to a certain moving target, through appropriate angular pan-tilt positioning. This work presents a visual servoing technique, which uses first the images captured by the camera
Publicado em: 2007
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9. CALIBRAGEM VISUAL IN SITU DE MANIPULADORES ROBÓTICOS COM APLICAÇÃO EM INTERVENÇÕES SUBMARINAS / VISION BASED IN-SITU CALIBRATION OF ROBOTS WITH APPLICATION IN SUBSEA INTERVENTIONS
The majority of today`s industrial robots are programmed to follow a predefined trajectory. This is sufficient when the robot is working in a fixed environment where all objects of interest are situated in a predetermined position relative to the robot base. However, if the robot`s position is altered all the trajectories have to be reprogrammed for the robo
Publicado em: 2007
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10. Análise das estratégias de movimento adotadas durante a realização de manuseio de carga.
Despite recent technological advances, occupational activities of manual nature are still essential in many sectors and industries. Such activities impose risky conditions, which are inherent to its nature and can be responsible for musculoskeletal injuries. In addiction, the complexity and the interaction of risk factors, many still not comprehended, that a
Publicado em: 2007
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11. Images acquisition system development and validation for sailing / Desenvolvimento e validação de sistema de aquisição de imagens na vela
This study aimed to develop instrumentation for images acquisition that makes possible movements quantification and kinematics analysis of the sailors hiking positions in Laser boats. Two waterproof boxes were developed for cameras protection, confectioned with fiberglass and acrylic lens viewfinder. The camera and lens viewfinder components had been tested
Publicado em: 2006
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12. Sistema de visão robótica para identificação e localização de objetos sob manipulação por robôs industriais em células de manufatura.
There are several techniques for applying robotic vision for identification and localization of industrial objects. These objects are typically found in manufacturing cells. The purpose is to catch and transport the pieces for automatically grouping. Robotic vision for industrial objects is an important and still difficult task, especially feature extraction
Publicado em: 2006