Motion/growth tracking
When several successive 3D acquisitions of a plant or tree are available, it is possible to track its motion over time. Depending on the time scale, this can be e.g., a balancing motion due to windy conditions, or the growth motion. The latter case is more difficult since assumptions such as a piecewise rigid motion do not hold, and organs can appear or even disappear. Motion can then be interpolated to create nice 3D videos!
Multi-scale space-time registration of growing plants
We introduce a new method for the space-time registration of a growing plant that is based on matching the plant at different geometric scales. The proposed method starts with the creation of a topological skeleton of the plant at each time step. This skeleton is then used to segment the plant into parts that we call branches, which are further divided into smaller segments. These segments are matched between two time steps and a point-wise registration is devised for each pair of segments matched.
Context: Haolin Pan's Master thesis, ROMI project
Collaborators: Haolin Pan (Master student), David Colliaux (researcher, Sony CSL)
Main paper: [3DV'21]
Software: 4D plant analysis
Data set: Arabidopsis 3D+t point clouds (acquisitions by Julie Charlaix)
