From pixel to vine parcel: A complete methodology for vineyard delineation and characterization using remote-sensing data

International audienceThe increasing availability of Very High Spatial Resolution images enables accurate digital maps production as an aid for management in the agricultural domain. In this study we develop a comprehensive and automatic tool for vineyard detection, delineation and characterizationusing aerial images and without any parcel plan availability. In France, vineyard training methods in rows or grids generate periodic patterns which make frequency analysis a suitable approach. The proposed method computes a Fast Fourier Transform on an aerial image, providing the delineation of vineyards and the accurate evaluation of row orientation and interrow width. These characteristics are then used to extract individual vine rows, with the aim of detecting missing vine plants and characterizing cultural practices. Using the red channel of an aerial image, 90\% of the parcels have been detected; 92\% have been correctly classified according to their rate of missing vine plants and 81\% according to their cultural practice (weed control method). The automatic process developed can be easily integrated into the final user's Geographical Information System and produces useful information for vineyard managemen

Modélisation statistique de lignes et de points par courbes de Bézier composites

- Dans cet article nous proposons un modèle statistique non linéaire et invariant par transformations affines permettant d'apprendre un objet moyen (représenté par des points), sa variabilité et les relations spatiales existantes entre les différentes caractéristiques de l'objet étudié. La question qui se pose alors est : qu'est-ce qu'un objet ? La réponse que nous adoptons est de considérer qu'un objet est un ensemble de points et de formes. Nous mettons ici en place un formalisme permettant d'unifier les notions de point et de forme, en approximant les formes par des courbes de Bézier composites. L'ensemble de cette méthodologie a été évalué en céphalométrie dans le cadre de la modélisation de points et de structures anatomiques

Fluorescent probes based on side-chain chlorinated benzo[a]phenoxazinium chlorides: studies of interaction with DNA

The interaction of DNA with six water soluble benzo[a]phenoxazinium chlorides mono- or di-substituted with 3-chloropropyl groups at the O and N of 2- and 9-positions, along with methyl, hydroxyl and amine terminal groups at 5-positions, was investigated by photophysical techniques. The results indicated that almost all compounds intercalated in DNA base pairs at phosphate to dye ratio higher than 5. At lower values of this ratio, electrostatic binding mode with DNA was observed. Groove binding was detected mainly for the benzo[a]phenoxazinium dye with NH2.HBr terminal. The set of six benzo[a]phenoxazinium chlorides proved successful to label the migrating DNA in agarose gel electrophoresis assays. These finding proves the ability of these benzo[a]phenoxazinium dyes to strongly interact with DNA.Thanks are due to Fundação para a Ciência e a Tecnologia (FCT, Portugal) and FEDER (European Fund for Regional Development)/COMPETE-QREN-EU for financial support to Research Centres CQ/UM [PEst-C/QUI/UI0686/2013 (FCOMP-01-0124-FEDER-037302)] and CFUM [PEst-C/FIS/UI0607/2013 (F-COMP-01-0124-FEDER-022711)]. The Postdoctoral grant to B. R. Raju (SFRH/BPD/62881/2009) is also acknowledged to FCT, POPHQREN, FSE

Analyse comparative de méthodes d’élaboration de trames vertes et bleues nationales et régionales

Dans le cadre de son appui au ministère de l'Écologie, de l'Énergie, du Développement durable et de la Mer pour le Comité opérationnel Trame verte et bleue, le Cemagref a réalisé une analyse comparative des méthodes d’élaboration de la Trame verte et bleue afin de contribuer à la réflexion sur la mise en place d’un cadre national de références. En voici les grandes lignes

Comparative analysis of formulation techniques for national and regional ecological networks

As part of its mission to assist the Ecology ministry in setting up the National ecological network, Cemagref carried out a comparative analysis on network formulation methods to assist in the establishment of national guidelines. This article presents the salient points

Mapping Natural Habitats Using Remote Sensing and Sparse Partial Least Square Discriminant Analysis. GI_Forum 2013 – Creating the GISociety|

In this paper, we tested a relatively new version of the Partial Least Square (PLS) method called the Sparse Partial Least Square Discriminant Analysis (SPLSDA). This improved method performs variable selection and classification in a one-step procedure and has been successfully applied in the field of bioinformatics (LÊ CAO et al. 2011). We are applying the method on remote sensing data for the classification of natural and semi-natural habitats in a Natura 2000 site located in Southern France. The work has been performed in the framework of the MS.MONINA FP7 project which is using the potential of GMES for the development of a multi-scale mapping service aimed at monitoring European protected habitats and species at the local, regional and continental scales