Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"Red Edge"”.
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Remote sensing of grassland with contaminated soil using the spectral red-edge
… vegetation and therefore can<br/>not be measured directly by remote sensing. However, soil contaminants were detected<br/>using the spectral red-edge to indicate vegetation stress caused by the presence of<br/>the contaminants. An improved red-edge position (REP) was developed and gave …
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Optimizing yield and crop nitrogen response characterization by integrating spectral reflectance and agronomic properties in sugarcane and rice
… of water background turbidity and depth on red and red-edge reflectance based prediction models for biomass and grain yield in rice, 2) evaluate agronomic parameters of different sugar cane varieties in response to variable levels of nitrogen supply, and 3) determine the effect of sugarcane …
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Multispectral Imaging Techniques for Monitoring Vegetative Growth and Health
… in reflectance is known as the vegetation red edge. The NDVI (Normalized Difference Vegetation index) is an imaging technique for quantifying red edge contrast for the identification of vegetation. This imaging technique relies on reflectance values for radiation with wavelength equal to …
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Predicting Corn Response to Variable Synthetic Fertilizer Treatments Using UAV-Derived Imagery
… to estimate chlorophyll (Chl) status and predict corn grain yield potential in-season under variable nitrogen (N), phosphorus (P), and potassium (K) fertilizer treatments across different growth stages. Two field trials (NP and K) were conducted at two locations in Virginia, Kentland Farm …
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Assessing ice storm damage to hardwood forest canopies using the Advanced Solid-State Array Spectroradiometer (ASAS) and Landsat TM imagery
… Solid-State Array Spectroradiometer (ASAS), acquired imagery for nine ice damaged target areas in the White Mountain National Forest (WMNF). Ice damage was also measured in situ at 288 sample plots. Radiance values for nadir ASAS images were normalized and the blue shift of the red edge was …
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Evaluating the Performance of the Resampled nSight-2 Sensor's Spectral Configuration in Discriminating Wetland Plant Species Using Advanced Classifiers and Spectroscopy.
… of nSight-2 spectral settings were compared with those of the upcoming EnMap hyperspectral satellite and an already established Worldview-2 multi-spectral sensor that carries strategic wavebands for vegetation studies, i.e. red-edge and near-infrared. The study also evaluated the …
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Evaluation of the UAV-Based Multispectral Imagery and Its Application for Crop Intra-Field Nitrogen Monitoring and Yield Prediction in Ontario
… with RapidEye. The correlation between red-edge indices and LAI and biomass are higher for UAV-based imagery than that of RapidEye. Secondly, the nitrogen weight and yield in wheat was predicted using the UAV-based imagery. The intra-field nitrogen prediction model performs well at wheat …
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Multispectral canopy reflectance and digital imaging to determine maturity
… measure soybean developmental stages. To better predict developmental stages, seasonal dynamics of soybean canopies were characterized using canopy reflectance and digital imaging tools. Field experiments were conducted in 2014 and 2015 at two Missouri locations to characterize canopy …
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Analysing the influence of TNT on Southern African trees grass and shrubs using in-situ hyperspectral data
… of plant foliage, with the aim of being an area reduction aid. Increasing concentrations of TNT was administered to a study sample of five species of trees, five species of grasses and four species of shrubs, and leaf-clip readings were taken at regular intervals with a field spectrometer. …
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Hyperspectral Imagery for Precision Agriculture
… was proposed and implemented for image feature reduction. The general procedure was to select a subset of the original image bands and transform the image band subset to a new image space. The band subset can be regarded as the significant image bands for a given application. The first …
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Uso de características espectrais para detecção precoce da antracnose e murcha-de-fusário em feijoeiro-comum
… construção de classificadores baseados em redes neurais artificiais para detecção de folhas infectadas, teste de modelos existentes (índices de vegetação) e seleção de comprimentos de onda mais representativos para a detecção das folhas infectadas e nível de conídios por mililitros, …
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Hydrocarbon pollutant impact on spectral and biophysical properties of willow and grass species
… of hydrocarbon in the soil, showing a general reduction in all the studied parameters and in all plant species with respect to the non-polluted plants.26On the other hand, the presence of lower hydrocarbon concentrations (0.5 g/kg and 5 g/kg) revealed an increase in chlorophyll concentration, …
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Unmanned Aerial Remote Sensing for Estimating Cotton Yield
… from UAS multispectral and thermal infrared imagery and to determine optimal in-season timing of UAS flights for the strongest relationship with cotton yield. The experimental design was a 3x8 factorial within a completely randomized design arrangement with four repetitions and the study …
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From Hyperspectral Indices to Global Fluorescence: PACE Vegetation Indices as Predictors of Terrestrial Photosynthesis
… application of satellite-derived SIF is hindered by spatial resolution limitations and data gaps. The NASA Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission presents an opportunity to overcome these challenges through its hyperspectral Ocean Color Instrument and globally distributed …
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Beyond conventional boundaries: new technologies, methodologies, and procedures for the benefit of aerial archaeological data acquisition and analysis
… op het fotograferen van nabij-infrarode, ‘red edge’ en nabij-ultraviolette straling. Daarnaast voorziet een grondig theoretisch kader in de nodige onderbouwing voor het archeologische gebruik van deze specifieke spectrale banden. Alvorens de waarde van deze nieuwe technieken en bijhorende …
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Validation and application of the MERIS Terrestrial Chlorophyll Index.
… Resolution Imaging Spectrometer (MERlS) in red I near infrared spectral bands to produce an operational product called the MERlS Terrestrial Chlorophyll Index (MTCI). The MTCI is related to the position of the red edge in vegetation spectra and can be used to estimate the chlorophyll content …
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Evaluating the suitability of UAV data for mapping dominant plant species in a heterogenous fynbos seep wetland
… for Fynbos wetland inventory has not been explored. This study used multispectral UAV photography from Parrot Sequoia and Micasense RedEdge- M multispectral cameras to discriminate eleven wetland Fynbos plant species in a seep wetland located in the Steenbras Nature Reserve in the Western Cape …
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Visualizing Vulci: Reimagining an Etruscan-Roman City
… Vulci represents a rare site that was not covered by modern structures and thus presents a unique opportunity for a city-scale examination of the transformation of urban space over a millennium of occupation. In order to address this query while most of the site is still unexcavated, an …
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Productivity and ecosystem services from purpose-grown energy crops
… and stand health. Furthermore, quadrat-measured morphological traits can predict end-of-season biomass yield, with August-September canopy height and leaf chlorophyll content as the most effective linear predictors. Normalized difference red edge vegetation index (NDRE) from UAV flights …
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Effect of Nitrogen Rates, Planting Dates, and Irrigation Regimes on Potato Production in the Eastern Shore of Virginia
… larger tubers. Early March planting reduced plant development and emergence, probably due to lower air and soil temperatures. There was no interaction between planting dates and N applications. Using N rates higher than 147 kg ha-1 resulted in no significant differences in total tuber …
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