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Crops diagnosis using digital image processing and precision agriculture technologies

Jiménez López, Andrés Fernando; Salamanca, Juan Mauricio; Quiroz Medina, Melanie Jisell; Acevedo Pérez, Oscar Eduardo (Corporación Universidad de la Costa, 2015-01-05)

This paper presents the results of the design and implementation of a system for capturing and processing images of agricultural crops. The design includes the development of software and hardware for image acquisition ...
Diagnóstico de Cultivos Utilizando Procesamiento Digital de Imágenes y Tecnologías de Agricultura de Precisión

Jiménez López, Andrés Fernando; Quiroz Medina, Melanie Jisell; Acevedo Pérez, Oscar Eduardo; Salamanca, Juan Mauricio (Universidad de la Costa, 2015-01-05)

Este artículo presenta los resultados del diseño e implementación de un sistema de captura y procesamiento de imágenes de cultivos agrícolas. El diseño incluye el desarrollo de software y hardware para la adquisición de ...
Selection of jonswap spectra parameters during water-depth and sea-state transitions

Rueda-Bayona, Juan Gabriel; Guzmán, Andrés; Cabello Eras, Juan José (Corporación Universidad de la Costa, 2020)

The design of marine structures requires the simulation of wave parameters that consider sea-state and water-depth transitions. Proper selection of the model coefficients (e.g., alpha and gamma of the JONSWAP spectra) is ...

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Crops diagnosis using digital image processing and precision agriculture technologies
...
Jiménez López, Andrés Fernando | 2015-01-05

This paper presents the results of the design and implementation of a system for capturing and processing images of agricultural crops. The design includes the development of software and hardware for image acquisition using a model helicopter equipped with video cameras with a resolution of 640x480 pixels. A software application was developed for performing differential correction of errors generated by the Global Positioning System (GPS) and for allowing the monitoring of the position of the helicopter in real time. A telemetry system consisting of an inertial measurement unit, a magnetometer, a pressure and altitude sensor, one GPS and two photo cameras were developed. Finally, image processing software was developed to determine some vegetation indexes and generation of three-dimensional maps of crops.

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Diagnóstico de Cultivos Utilizando Procesamiento Digital de Imágenes y Tecnologías de Agricultura de Precisión
...
Jiménez López, Andrés Fernando | 2015-01-05

Este artículo presenta los resultados del diseño e implementación de un sistema de captura y procesamiento de imágenes de cultivos agrícolas. El diseño incluye el desarrollo de software y hardware para la adquisición de imágenes mediante un helicóptero de aeromodelismo equipado con cá- maras de resolución de 640x480 pixeles. Se desarrolló una aplicación en software para realizar la corrección diferencial de errores generados por el Sistema de Posicionamiento Global (GPS por sus siglas en inglés), permitiendo también el monitoreo de la posición del helicóptero en tiempo real. Se desarrolló un sistema de telemetría compuesto de una unidad de medida inercial, un magnetómetro, un sensor de presión y altitud, un GPS y dos cámaras fotográficas. Finalmente se elaboró un software de procesamiento de imágenes para determinar algunos índices de vegetación y generación de mapas tridimensionales de los cultivos.

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Selection of jonswap spectra parameters during water-depth and sea-state transitions
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Rueda-Bayona, Juan Gabriel | 2020

The design of marine structures requires the simulation of wave parameters that consider sea-state and water-depth transitions. Proper selection of the model coefficients (e.g., alpha and gamma of the JONSWAP spectra) is then required, because of the wave-hydrodynamic nonlinearities during these ocean processes. Therefore, the model coefficient selection should be tested using a nonlinear analysis to assess the effect of the selected spectra coefficients over the modeled wave parameters. The present study performed a design of experiment (DOE)-analysis of variance (ANOVA) and probability analysis to assess the effect of alpha and gamma parameters over the significant wave height (Hs) and peak period (Tp) during sea-state and water-depth transitions. The DOE-ANOVA demonstrated for the mean and extreme wave states of the study area that alpha and gamma parameters positively affect the Hs behavior in deep and intermediate waters. Furthermore, the standardized effects of alpha and gamma over the Tp during extreme wave states suggest quadruplets of wave-wave interactions. The joint and normal probability distributions of alpha and gamma for extreme and normal waves showed a Gaussian distribution, allowing identification of specific alpha and gamma values for the JONSWAP spectra model. The selected alpha and gamma parameters were then validated through the comparison of the modeled Hs (JONSWAP) against other local studies. Considering its relevance in design strategies for offshore structures, this research contributed to the understanding of the nonlinear effects of alpha and gamma parameters over the Hs and Tp during variations of water depth and wave states, easing the selection of the model coefficients.

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Listar por tema "Waves"

Crops diagnosis using digital image processing and precision agriculture technologies ﻿

Diagnóstico de Cultivos Utilizando Procesamiento Digital de Imágenes y Tecnologías de Agricultura de Precisión ﻿

Selection of jonswap spectra parameters during water-depth and sea-state transitions ﻿

Envíos recientes

Crops diagnosis using digital image processing and precision agriculture technologies

Diagnóstico de Cultivos Utilizando Procesamiento Digital de Imágenes y Tecnologías de Agricultura de Precisión

Selection of jonswap spectra parameters during water-depth and sea-state transitions

Crops diagnosis using digital image processing and precision agriculture technologies

Diagnóstico de Cultivos Utilizando Procesamiento Digital de Imágenes y Tecnologías de Agricultura de Precisión

Selection of jonswap spectra parameters during water-depth and sea-state transitions