Geometric model fitting
Once the 3D points of each plant organ have been isolated from the others, fitting a continuous geometric model such as a cylinder or a spline surface to them is often needed. It makes subsequent measurements easier and more robust to missing data or non-uniform sampling. A seminal work on this topic was the proposal of a quantitative structure model (QSM) for branching structures by Pasi Raumonen and colleagues in 2013.
Comparison of geometric models for plant leaf area estimation
Inspired by the work of Åkerblom et al. that showed that, under general assumptions, the circular cylinder is the most robust geometric primitive to fit tree branches, we compare if eight simple geometric models can robustly fit leaf blades and give accurate leaf area estimates. Nine criteria have been identified that can affect the robustness of the studied methods. We highlight the benefits and drawbacks of each model and show that fitting a Bézier surface is the most robust and accurate approach in most cases.
Context: Mélinda Boukhana's PhD thesis
Collaborators: Mélinda Boukhana (PhD student), Benoît de Solan (researcher, Arvalis - Institut du Végétal), Joris Ravaglia (research engineer, Univ. Strasbourg), Frédéric Larue (then research engineer, Univ. Strasbourg)
Main paper: [GVC'22]
Software: Plant leaf area estimation
