In this paper, we present an uncalibrated positionbased fixed-camera Visual Servoing for robot manipulators, where the goal is to track the 3D position and orientation of the target. The stereo system with 2 USB cameras is uncalibrated with respect to the robot base frame and the transformation between them is estimated on-line while performing the task. Dynamic impedance control is designed to generate a dynamic trajectory for the robot manipulator considering the dynamic environment constraints, such as: robot singularities avoidance and (self-/obstacle-) collision avoidance. Experiments have been carried out to verify performance of the proposed system on a real industrial robot, where the calibration estimation process and handling of all uncertainties in the environment are demonstrated. Moreover the uncalibrated stereo camera system can be manually moved while performing the task in order to obtain a clearer view and the re-calibration is performed automatically and on-line. Distributed System Visual Stereo Tracker Robot Low Level Control 3D Visualization System 2 cameras [Uncalibrated Stereo System] {30ms} t or q d Voltage q,q q,q Virtual Obstacle
El Índice de Vegetación de Diferencia Normalizada NDVI, se viene utilizando en el campo de la agricultura como indicador de la salud de las plantas, permitiendo diferenciar las zonas vegetadas de otras coberturas; y diferenciar la vegetación sana de aquella senescente o que se encuentra bajo algún tipo de estrés (ej. plagas, cambio de uso de suelo, etc.). Se presenta una técnica de visión artificial aplicada a la detección de características en el desarrollo de cultivos de brócoli, mediante la aplicación de un sistema de visión por computador, basado en imágenes espectrales adquiridas por medio de una cámara Survey 2 NDVI Red + NIR, adaptada a una plataforma aérea (drone) y procesadas en el lenguaje de programación Matlab para posteriormente a ello tener como resultado el NDVI de mencionados cultivos.
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