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Hyperspectral vegetation indices and novel algorithms for predicting green LAI of crop canopies: modelling and validation in the context of precision agriculture / D. Haboudane in Remote sensing of environment, vol 90 n° 3 (15/04/2004)  

Public [article]  inRemote sensing of environment > vol 90 n° 3 (15/04/2004) . - pp 337 - 352 Titre : Hyperspectral vegetation indices and novel algorithms for predicting green LAI of crop canopies: modelling and validation in the context of precision agriculture Type de document : Article/Communication Auteurs : D. Haboudane, Auteur ; J.R. Miller, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 337 - 352 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] agriculture de précision [Termes IGN] analyse comparative [Termes IGN] blé (céréale) [Termes IGN] chlorophylle [Termes IGN] cultures [Termes IGN] données de terrain [Termes IGN] Glycine max [Termes IGN] Green Leaf Area Index [Termes IGN] image CASI [Termes IGN] image hyperspectrale [Termes IGN] indice de végétation [Termes IGN] maïs (céréale) [Termes IGN] modèle de transfert radiatif [Termes IGN] prévision [Termes IGN] réflectance végétale Résumé : (Auteur) A growing number of studies have focused on evaluating spectral indices in terms of their sensitivity to vegetation biophysical parameters, as well as to external factors affecting canopy reflectance. In this context, leaf and canopy radiative transfer models are valuable for modeling and understanding the behavior of such indices. In the present work, PROSPECT and SAILH models have been used to simulate a wide range of crop canopy reflectances in an attempt to study the sensitivity of a set of vegetation indices to green leaf area index (LAI), and to modify some of them in order to enhance their responsivity to LAI variations. The aim of the paper was to present a method for minimizing the effect of leaf chlorophyll content on the prediction of green LAI, and to develop new algorithms that adequately predict the LAI of crop canopies. Analyses based on both simulated and real hyperspectral data were carried out to compare performances of existing vegetation indices (Normalized Difference Vegetation Index [NDVI], Renormalized Difference Vegetation Index [RDVI], Modified Simple Ratio [MSR], Soil-Adjusted Vegetation Index [SAVI], Soil and Atmospherically Resistant Vegetation Index [SARVI], MSAVI, Triangular Vegetation Index [TVI], and Modified Chlorophyll Absorption Ratio Index [MCARI]) and to design new ones (MTVII, MCARII, MTV12, and MCAR12) that are both less sensitive to chlorophyll content variations and linearly related to green LAI. Thorough analyses showed that the above existing vegetation indices were either sensitive to chlorophyll concentration changes or affected by saturation at high LAI levels. Conversely, two of the spectral indices developed as a part of this study, a modified triangular vegetation index (MTV12) and a modified chlorophyll absorption ratio index (MCAR12), proved to be the best predictors of green LAI. Related predictive algorithms were tested on CASI (Compact Airborne Spectrographic Imager) hyperspectral images and, then, validated using ground truth measurements. The latter were collected simultaneously with image acquisition for different crop types (soybean, corn, and wheat), at different growth stages, and under various fertilization treatments. Prediction power analysis of proposed algorithms based on MCAR12 and MTV12 resulted in agreements between modeled and ground measurement of non-destructive LAI, with coefficients of determination (r) being 0.98 for soybean, 0.89 for com, and 0.74 for wheat. The corresponding RMSE for LAI were estimated at 0.28, 0.46, and 0.85, respectively. Numéro de notice : A2004-201 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2003.12.013 En ligne : https://doi.org/10.1016/j.rse.2003.12.013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26728 [article]

Optical indices as bioindicators of forest condition from hyperspectral CASI data / Pablo J. Zarco-Tejada (31/05/1999)

Public contenu dans Remote sensing in the 21st century : economic and environmental applications / José Luis Casanova (2000) Titre : Optical indices as bioindicators of forest condition from hyperspectral CASI data Type de document : Article/Communication Auteurs : Pablo J. Zarco-Tejada, Auteur ; J.R. Miller, Auteur ; G.H. Mohammed, Auteur ; T.L. Noland, Auteur ; P.H. Sampson, Auteur Editeur : Lisse et Amsterdam : Balkema (August Aimé) Année de publication : 31/05/1999 Conférence : EARSeL 1999, 19th symposium, Remote sensing in the 21st century : economic and environmental applications 31/05/1999 02/06/1999 Valladolid Espagne Importance : pp 517 - 522 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Acer (genre) [Termes IGN] Compact airborne spectrographic imager [Termes IGN] forêt [Termes IGN] image CASI [Termes IGN] image hyperspectrale [Termes IGN] réflectance végétale [Termes IGN] télédétection aérienne Résumé : (Auteur) This paper reports on progress made to link physiologically-based indicators to optical indices scaling-up from leaf level to the canopy through SAIL and Kuusk Canopy Reflectance Models (CR). Hyperspectral CASI data of 2m spatial resolution and 72 channels were collected in 1997 and 1998 deployments over twelve sites of Acer saccharum M. in Ontario (Canada). A field sampling campaign was carried out for biochemical analysis of leaf chlorophyll and carotenoid concentrations, and fluorescence along with leaf reflectance and transmittance. Leaf-level relationships obtained between optical indices and biochemical indicators were scaled-up to canopy level through CR models using input model parameters related to the canopy structure and viewing geometry at the time of data acquisition. The result is an algorithm which predicts leaf-level bioindicators from airborne hyperspectral imagery. A modeling study was carried out to determine the influence of CR on the four types of optical indices used in this study. Numéro de notice : C1999-049 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Communication Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65815

On calibration of passive optical bathymetry through depth soundings : analysis and treatment of errors resulting from the spatial variation of environmental parameters / N. O'neill in International Journal of Remote Sensing IJRS, vol 10 n° 9 (September 1989)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 10 n° 9 (September 1989) . - pp 1481 - 1501 Titre : On calibration of passive optical bathymetry through depth soundings : analysis and treatment of errors resulting from the spatial variation of environmental parameters Type de document : Article/Communication Auteurs : N. O'neill, Auteur ; J.R. Miller, Auteur Année de publication : 1989 Article en page(s) : pp 1481 - 1501 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] capteur optique [Termes IGN] capteur passif [Termes IGN] étalonnage d'instrument [Termes IGN] étalonnage radiométrique [Termes IGN] lever bathymétrique [Termes IGN] simulation [Termes IGN] sonar [Termes IGN] traitement d'image Numéro de notice : A1989-259 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431168908903985 En ligne : https://doi.org/10.1080/01431168908903985 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25219 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-89081	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Comparison of 'in-situ' and airborne spectral measurements of the blue shift associated with forest decline / B.N. Rock in Remote sensing of environment, vol 24 n° 1 (February 1988)  

Public [article]  inRemote sensing of environment > vol 24 n° 1 (February 1988) . - pp 109 - 127 Titre : Comparison of 'in-situ' and airborne spectral measurements of the blue shift associated with forest decline Type de document : Article/Communication Auteurs : B.N. Rock, Auteur ; T. Hoshizaki, Auteur ; J.R. Miller, Auteur Année de publication : 1988 Article en page(s) : pp 109 - 127 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Abies (genre) [Termes IGN] absorption [Termes IGN] analyse comparative [Termes IGN] chlorophylle [Termes IGN] déboisement [Termes IGN] données de terrain [Termes IGN] Etats-Unis [Termes IGN] Europe centrale [Termes IGN] forêt [Termes IGN] pollution atmosphérique [Termes IGN] réflectance végétale [Termes IGN] signature spectrale Numéro de notice : A1988-043 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/0034-4257(88)90008-9 En ligne : https://doi.org/10.1016/0034-4257(88)90008-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24622 [article]