Search results for "METHODOLOGIE"
showing 10 items of 2141 documents
A Study on the Impact of Spectral Characteristics of Filters on Multispectral Image Acquisition
2013
International audience; In every aspect, filter design plays an important role in an image acquisition system based on a single image sensor and a colour filter array (CFA) mounted onto the sensor. Complementary CFAs are used by some colour cameras in the interest of higher sensitivity, which motivated us to employ filters of wide pass bands in the effort to adapt CFA for multispectral image acquisition. In this context, filter design has an effect on the accuracy of spectrum reconstruction in addition to other aspects. The results show that wider bandwidths in general result in more faithful spectrum reconstruction and higher signal-to-noise performance.
Assessing the impact of ancient mining activity at regional scale: the example of the Northern French Alps.
2018
Poster; International audience
Relevance of different soil fauna and microflora groups in the monitoring of soil biodiversity: RMQS-Biodiv, a French pilot area experience.
2008
PosterFR2116Poster
3D ACQUISITION SYSTEM APPLIED TO AGRONOMIC SCENES
2012
International audience; To improve results in automatic wheat ear counting by proxy-detection for early yield prediction, we need depth information of the scene. In this paper, we describe our 3D acquisition system dedicated to reconstruction of agronomic scenes. This system is composed of a camera mounted on a linear displacement driven by a microcontroller. The linear displacement allows acquiring a set of images in different distances to the scene. This image stack is used to apply shape from focus technique which is a passive and monocular 3D reconstruction method. This technique consists in the application of a focus measure for every pixel in the stack. An approximation method is used…
Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
2008
Data collected by the Pierre Auger Observatory provide evidence for anisotropy in the arrival directions of the cosmic rays with the ighest-energies, which are correlated with the positions of relatively nearby active galactic nuclei (AGN) [Pierre Auger Collaboration, Science 318 (2007) 938]. The correlation has maximum significance for cosmic rays with energy greater than ~6 x 1019 eV and AGN at a distance less than ~75 Mpc. We have confirmed the anisotropy at a confidence level of more than 99% through a test with parameters specified a priori, using an independent data set. The observed correlation is compatible with the hypothesis that cosmic rays with the highest-energies originate fro…
Corrélation entre pluies/NDVI au Cameroun entre 1951-2002.
2008
Poster
Impacts de la récession pluviométrique sur la disponibilité en eau dans le bassin versant du Couffo au Bénin (Afrique de l'Ouest)
2008
Poster; International audience
Erosion pluviale et dégradation du réseau viaire dans le quartier Boy-Rabe à Bangui (Centrafrique).
2007
POSTER; International audience
Le méthoxy-4 méthyl-2 butanethiol-2. un constituant majeur de l'arôme du bourgeon de Cassis (Ribes nigrum L.)
1986
National audience
Identification du (-) spathulénol dans l'huile essentielle de bourgeons de cassis (Ribes nigrum L.)
1986
National audience