Journal ArticleDOI
Integrated narrow-band vegetation indices for prediction of crop chlorophyll content for application to precision agriculture
D. Haboudane,John R. Miller,John R. Miller,Nicolas Tremblay,Pablo J. Zarco-Tejada,Louise Dextraze +5 more
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TLDR
In this paper, a combined modeling and indices-based approach is presented to predict the crop chlorophyll content from remote sensing data while minimizing LAI (vegetation parameter) influence and underlying soil background effects.About:
This article is published in Remote Sensing of Environment.The article was published on 2002-08-01. It has received 1516 citations till now. The article focuses on the topics: Enhanced vegetation index & Red edge.read more
Citations
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Spectral analysis of coniferous foliage and possible links to soil chemistry: Are spectral chlorophyll indices related to forest floor dissolved organic C and N?
Jana Albrechtová,Zdeněk Seidl,Jacqueline A. Aitkenhead-Peterson,Zuzana Lhotáková,Barrett N. Rock,Jess E. Alexander,Zbyněk Malenovský,Zbyněk Malenovský,William H. McDowell +8 more
TL;DR: It is hypothesized that in a coniferous forest, chemistry of old foliage would better predict the chemical composition of the forest floor litter layer than younger foliage, which is the more physiologically active and the most likely to be captured by remote sensing of the canopy.
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Off-Nadir Hyperspectral Sensing for Estimation of Vertical Profile of Leaf Chlorophyll Content within Wheat Canopies.
TL;DR: It is suggested that it is necessary to take into account the penetration characteristic of the light inside the canopy for different Chl absorption regions of the spectrum and the formula used to derive spectral index when estimating the vertical profile of leaf Chl content using off-nadir hyperspectral data.
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Spectral assessment of two-spotted spider mite damage levels in the leaves of greenhouse-grown pepper and bean
TL;DR: This study shows that by using sub leaf spatial resolution early damage by TSSM can be spectrally detected and can be potentially applied for greenhouses as well as fields as an early detection method for T SSM management.
Journal ArticleDOI
Estimation of Total Nitrogen Content in Forage Maize (Zea mays L.) Using Spectral Indices: Analysis by Random Forest
Magali J. López-Calderón,Juan Estrada-Ávalos,Víctor M. Rodríguez-Moreno,Jorge E. Mauricio-Ruvalcaba,Aldo R. Martínez-Sifuentes,Gerardo Delgado-Ramírez,Enrique Miguel-Valle +6 more
TL;DR: In this article, a Parrot Sequoia camera mounted on an unmanned aerial vehicle (UAV) was used to collect high resolution images of forage maize study plots and 13 multispectral indices were generated and, from these, a Random Forest (RF) algorithm is used to estimate Nt.
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ANALYSIS OF AIRBORNE HYPERSPECTRAL IMAGE USING VEGETATION INDICES, RED EDGE POSITION AND CONTINUUM REMOVAL FOR DETECTION OF Ganoderma DISEASE IN OIL PALM
TL;DR: In this paper, five common vegetation indices (VI), four red edge position (REP) and four continuum removal (CR) were applied to categorise oil palm into T1 (healthy), T2 (mild) and T3 (severe) infection of Ganoderma disease in oil palm.
References
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Journal ArticleDOI
A soil-adjusted vegetation index (SAVI)
TL;DR: In this article, a transformation technique was presented to minimize soil brightness influences from spectral vegetation indices involving red and near-infrared (NIR) wavelengths, which nearly eliminated soil-induced variations in vegetation indices.
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Determination of accurate extinction coefficients and simultaneous equations for assaying chlorophylls a and b extracted with four different solvents: verification of the concentration of chlorophyll standards by atomic absorption spectroscopy
TL;DR: In this paper, the extinction coefficients for chlorophylls a and b in diethylether (Smith, J.H. and Benitez, A.V., eds.), used in this paper as primary standards, were verified by magnesium determination using atomic absorbance spectrophotometry.
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PROSPECT: A model of leaf optical properties spectra
TL;DR: In this paper, a radiative transfer model based on Allen's generalized plate model is proposed to represent the optical properties of plant leaves from 400 nm to 2500 nm, where spectral refractive index (n) and a parameter characterizing the leaf mesophyll structure (N) are used.
Book
Theory of Reflectance and Emittance Spectroscopy
TL;DR: In this article, the authors present a review of vector calculus and functions of a complex variable and Fraunhoffer diffraction by a circular hole, and a miscellany of bidirectional reflectances and related quantities.
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Estimating Corn Leaf Chlorophyll Concentration from Leaf and Canopy Reflectance
TL;DR: In this paper, a wide range of leaf chlorophyll levels were established in field-grown corn (Zea mays L.) with the application of 8 N levels: 0, 12.5%, 25, 50, 75, 100, 125, and 150% of the recommended rate.