Know more

About cookies

What is a "cookie"?

A "cookie" is a piece of information, usually small and identified by a name, which may be sent to your browser by a website you are visiting. Your web browser will store it for a period of time, and send it back to the web server each time you log on again.

Different types of cookies are placed on the sites:

  • Cookies strictly necessary for the proper functioning of the site
  • Cookies deposited by third party sites to improve the interactivity of the site, to collect statistics

Learn more about cookies and how they work

The different types of cookies used on this site

Cookies strictly necessary for the site to function

These cookies allow the main services of the site to function optimally. You can technically block them using your browser settings but your experience on the site may be degraded.

Furthermore, you have the possibility of opposing the use of audience measurement tracers strictly necessary for the functioning and current administration of the website in the cookie management window accessible via the link located in the footer of the site.

Technical cookies

Name of the cookie


Shelf life

CAS and PHP session cookies

Login credentials, session security



Saving your cookie consent choices

12 months

Audience measurement cookies (AT Internet)

Name of the cookie


Shelf life


Trace the visitor's route in order to establish visit statistics.

13 months


Store the anonymous ID of the visitor who starts the first time he visits the site

13 months


Identify the numbers (unique identifiers of a site) seen by the visitor and store the visitor's identifiers.

13 months

About the AT Internet audience measurement tool :

AT Internet's audience measurement tool Analytics is deployed on this site in order to obtain information on visitors' navigation and to improve its use.

The French data protection authority (CNIL) has granted an exemption to AT Internet's Web Analytics cookie. This tool is thus exempt from the collection of the Internet user's consent with regard to the deposit of analytics cookies. However, you can refuse the deposit of these cookies via the cookie management panel.

Good to know:

  • The data collected are not cross-checked with other processing operations
  • The deposited cookie is only used to produce anonymous statistics
  • The cookie does not allow the user's navigation on other sites to be tracked.

Third party cookies to improve the interactivity of the site

This site relies on certain services provided by third parties which allow :

  • to offer interactive content;
  • improve usability and facilitate the sharing of content on social networks;
  • view videos and animated presentations directly on our website;
  • protect form entries from robots;
  • monitor the performance of the site.

These third parties will collect and use your browsing data for their own purposes.

How to accept or reject cookies

When you start browsing an eZpublish site, the appearance of the "cookies" banner allows you to accept or refuse all the cookies we use. This banner will be displayed as long as you have not made a choice, even if you are browsing on another page of the site.

You can change your choices at any time by clicking on the "Cookie Management" link.

You can manage these cookies in your browser. Here are the procedures to follow: Firefox; Chrome; Explorer; Safari; Opera

For more information about the cookies we use, you can contact INRAE's Data Protection Officer by email at or by post at :


24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo Principal AgroParisTech Université de Lorraine UMR SILVA

Home page


Heading being modified

Research Scientist-INRAE
Fleur longuetaud


Wood-Stock Team
Centre INRAE Grand Est -Nancy
 F-54280 CHAMPENOUX (France)

+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.


Publications since 2000
Read more