Search results for "RESEAU DE NEURONES"

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Performances of neural networks for deriving LAI estimates from existing CYCLOPES and MODIS products

2008

International audience; This paper evaluates the performances of a neural network approach to estimate LAI from CYCLOPES and MODIS nadir normalized reflectance and LAI products. A data base was generated from these products over the BELMANIP sites during the 2001-2003 period. Data were aggregated at 3 km x 3 km, resampled at 1/16 days temporal frequency and filtered to reject outliers. VEGETATION and MODIS reflectances show very consistent values in the red, near infrared and short wave infrared bands. Neural networks were trained over part of this data base for each of the 6 MODIS biome classes to retrieve both MODIS and CYCLOPES LAI products. Results show very good performances of neural …

[SPI.OTHER]Engineering Sciences [physics]/OtherMean squared errorBiome0211 other engineering and technologiesSoil Science02 engineering and technologyNEURAL NETWORKSStandard deviationALBEDONadirComputers in Earth SciencesLeaf area indexLEA021101 geological & geomatics engineeringRemote sensingMathematicsCYCLOPESGeology04 agricultural and veterinary sciencesVegetation15. Life on landCONSISTENCY OF PRODUCTSRESEAU DE NEURONESMODISTemporal resolutionOutlier040103 agronomy & agriculture0401 agriculture forestry and fisheriesVEGETATIONLEAF AREA INDEX
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