LONGUETAUD Fleur UMR SILVA  Wood-Stock Team Centre INRAE Grand Est -Nancy  F-54280 CHAMPENOUX (France) fleur.longuetaud@inrae.fr +33 (0)3 83 39 41 39

• Scientific interest:

►Research topics

My main area of ​​research concerns the allocation of woody biomass in forest trees based on ontogenetic stages and environmental conditions, including the competition. The term allowance, widely used, covers a multitude of potential study subjects. I'm particularly interested in the aspect that the distribution of woody aboveground biomass in the stem and in the crown of forest trees. In particular, this requires attention to a key physical variable, the density of the wood. One goal of my project is to make an inventory allocation laws most commonly used in forestry, volume mostly - are the particular law of Pressler and pipe model - to study their limitations and possibly to provide more generic in order to be able to model the fine distribution of the biomass of forest trees and its evolution in changing conditions. 
Part of my work is devoted to more applied research on the measurement of wood properties (density, nodule) by X-ray tomography

►Previous activities

1. Stand dynamics and plasticity of crown
2. Markers of primary growth
3. Development of methodologies around the X-ray CT

• Projects:

► Current:

• Modelfor 2012-2015

• PassWood FP7-2013 (in the process of submission)

 ► Past:

• ANR EMERGE "Compatible volume/biomass and nutrient contents equations for fuel wood and forest resource : tools for sustainable and clear management" 2008-2012

Publications since 2000

• Recent publications:

► Scientific articles

-Roussel, JR., Mothe, F., Krähenbühl, A., Kerautret,B., Debled-Rennesson, I., Longuetaud, F., 2014. Automatic knot segmentation in CT images of wet softwood logs using a tangential approach. Computers and Electronics in Agriculture, 104, 46-56.

-Krähenbühl, A., Kerautret, B., Debled-Rennesson, I., Mothe, F., Longuetaud, F., 2014. Knot segmentation in 3D CT images of wet wood. Pattern Recognition ,47, 3852-3869. PeeJPrePrints.

-Duchateau, E., Auty, D., Mothe,  F., Longuetaud, F., 2014. Models of knot and stem development in black spruce trees indicates a shift in allocation priority to branches when growth is limited.

-Longuetaud, F., Mothe, F., Desplanches, P., Colin, A., Deleuze, C., 2013. Les coefficients d’expansion pour déduire différents volumes de branches à partir de volumes de tige. Rendez-Vous Techniques,39-40, 48-59.

-HENRY, M., BOMBELLI, A., TROTTA, C., ALESSANDRINI, A., BIRIGAZZI, L., SOLA, G., VIELLEDENT, G., SANTENOISE, P., LONGUETAUD, F., VALENTINI, R., PICARD, N., CHAVE, J., SAINT-ANDRE, L. 2013. GlobAllomeTree: international platform for tree allometric equations to support volume, biomass and carbon assessment. iForest - Biogeosciences and Forestry, 6, 326.

-LONGUETAUD, F., PIBOULE, A., WERNSDORFER, H., COLLET, C. 2013. Crown plasticity reduces inter-tree competition in a mixed broadleaved forest. European Journal of Forest Research, 41640.

-LONGUETAUD, F., SANTENOISE, P., MOTHE, F., SENGA-KIESSE, T., RIVOIRE, M., SAINT-ANDRE, L., OGNOUABI, N., DELEUZE, C. 2013. Modeling volume expansion factors for temperate tree species in France. Forest Ecology and Management, 292, 111-121.

-DUCHATEAU, E., LONGUETAUD, F., MOTHE, F., UNG, C., AUTY, D., ACHIM, A. 2013. Modelling knot morphology as a function of external tree and branch attributes. Canadian Journal of Forest Research,43, 266-277.

-FRANCESCHINI, T., LONGUETAUD, F., BONTEMPS, J.D., BOURIAUD, O., CARITEY, B.D., LEBAN J.M. 2013. Effect of ring width, cambial age, and climatic variables on the within-ring wood density profile of Norway spruce Picea abies (L.) Karst. Trees Structure and Functions, 27, 913-925.

-Longuetaud, F., Mothe, F., Bakhshieva, M., Chubinsky, A;, Tambi, A., Charpentier, P., Bombardier, V., 2013. Study on wood species identification by using computed tomography (in russian). Journal of the Forestry Academy of Saint-Petersburg, 202, 158-167.

-LONGUETAUD, F., MOTHE, F., KERAUTRET, B., KRÄHENBÜHL, A., HORY, L., LEBAN, J.M., DEBLED-RENNESSON, I., 2012. Automatic knot detection and measurements from X-ray CT images of wood: A review and validation of an improved algorithm on softwood samples. Computers and Electronics in Agriculture, 85, 77-89.

-BOUKADIDA, H., LONGUETAUD, F., COLIN, F., FREYBURGER, C., CONSTANT, T., MOTHE, F., 2012. PithExtract: a robust algorithm for pith detection in computer tomography images of wood - Application to 125 logs from 17 tree species. Computers and Electronics in Agriculture, 85, 90-98.

► Popular articles

-Deleuze, C., Morneau, F., Renaud, JP., Vivien, Y., Rivoire, M., Santenoise, P., Longuetaud, F., Mothe, F., Herve, JC., 2014. Estimation harmonisée du volume de tige à différentes découpes. Rendez-Vous Techniques, 44, 32-42.

-Deleuze, C., Morneau, F., Renaud, JP., Vivien, Y., Rivoire, M., Santenoise, P., Longuetaud, F., Mothe, F., Herve, JC., Vallet, P., 2014. Estimer le volume total d'un arbre, quelles que soient l'essence, la taille, la sylviculture, la station. Rendez-Vous Techniques, 44, 22-32.

-Longuetaud, F., Mothe, F., Santenoise, P., Colin, F., Borianne, P., Deleuze, C., 2014. Un scanner tomographique à rayons X pour l’analyse de la structure interne des arbres.Rendez-Vous Techniques, 44, 57-64.

-Longuetaud, F., Mothe, F., Santenoise, P., Rivoire, M., Fournier, M., Dupouey, JL., Saint-Andre, L., Deleuze, C., 2014. Etude exploratoire de la masse volumique. Influence du « taux de remplissage » en eau du bois frais. Rendez-Vous Techniques, 44, 65-72.

-Longuetaud, F., Rivoire, M., Santenoise, P., Mothe, F., Caraglio, Y., Deleuze, C., 2014. Mesures de volume, biomasse, minéralomasse : peut-on généraliser par groupes d'essences de même architecture et structure interne ? Rendez-Vous Techniques,44, 18-21.

-BONTEMPS, J.D., LONGUETAUD, F., CHARRU, M., FRANCESCHINI, T., CONSTANT, T. 2012. L'estimation de la biomasse et de la productivité forestières à l'épreuve des changements environnementaux. Revue forestière française 64(1), 41-54

► Communications

-Krähenbühl, A., Roussel, JR., Kerautret, B., Debled-Rennesson, I., Mothe, F., Longuetaud, F., 2014. Segmentation robuste de nœuds à partir de coupes tangentielles issues d'images tomographiques de bois.

-Bakhshieva, M., Longuetaud, F.,  Mothe, F.,Charpentier, P., Bombardier, V., 2013. Identification of wood species by using computes tomography. 9th International scientific conference on production engineering, 725-730.

-KRÄHENBÜHL, A., KERAUTRET, B., DEBLED-RENNESSON, I., LONGUETAUD, F., MOTHE, F. 2012. Knot detection in X-ray CT images of wood. Advances in Visual Computing, 209-218.

-KRÄHENBÜHL, A., KERAUTRET, B., DEBLED-RENNESSON, I., LONGUETAUD, F., MOTHE, F. 2012. Knot detection in X-ray CT images of wood. 8th International Symposium on Visual Computing (ISCV’12). 16-18 juillet, Rethymnon, Crete, Greece.

-KRÄHENBÜHL, A., LONGUETAUD, F., MORISSET, J.B., COLIN, F., DEBLED-RENNESSON, I., KERAUTRET, B., MOTHE, F. 2012. Knot shape assessment on various species through X-ray CT scanning. 2012 IUFRO Conference, Division 5, Forest Products. 8-13 juillet, Estoril Congress Centre, Lisbon, Portugal.

-DUCHATEAU, E., ACHIM, A., MOTHE, F., LONGUETAUD, F., UNG, C.H. 2012. Modeling knots shape in black spruce (picea mariana) and jack pine (pinus banksiana). 2012 IUFRO Conference, Division 5, Forest Products. 8-13 juillet, Estoril Congress Centre, Lisbon, Portugal.

-MORISSET, J.B., COLIN, F., MOTHE, F., LONGUETAUD, F. 2012. Trunk structure, CT scanning and tree architecture. 2012 IUFRO Conference, Division 5, Forest Products. 8-13 juillet, Estoril Congress Centre, Lisbon, Portugal.