to be updated!

3D-Canopy Analyzer: A laser-scanner system for high-resolution 3D-measurement and physiological simulation of tree canopy structures

In cooperation with: Stefan Fleck (University of Göttingen) and Thomas Abmayr (Zoller + Fröhlich GmbH)

The project aims to develop a new integrated system for automated canopy structure assessment and physiological modeling that is based on terrestrial laser-scanning. The system is developed and tested with integrated measurements of tree structure, light climate, photosynthesis, and transpiration in row plantations of apple and cherry trees. The approach is conducted by 3 partners and comprises 3 steps:
1. The 3D-laser scanner Imager 5003 (Zoller + Fröhlich GmbH, Wangen) is used to acquire 3D-point clouds from multiple view positions in order to represent canopy structure of single trees. The combination with a camera shall enable colour discrimination between points originating from branches, leaves and fruits. 2. colored point clouds are automatically segmented and canopy elements are approximated by surface functions (TU Delft). Allometric relationships to branch cross-sectional area will be employed to check plausibility of the resulting structure representation. 3. The structure representation is integrated with a 3D-light-model. Light acclimation of all single leaves is modelled based on measured relationships and a model of photosynthesis and transpiration will be employed on the leaf scale. Validation measurements of leaf photosynthesis, light acclimation, and branch transpiration are used to test the combined model of structure, light, and physiology on different levels of spatial integration.

Approximation of stem diameters of single standing trees from high density airborne data

In cooperation with the ICT Dienst of the Rijkswaterstaat.

Together with the Data ICT Dienst of Rijkswaterstaat we investigate the potential of FLI-MAP 400 data to automatically measure forest inventory parameters of single standing trees. This focuses on the automatic stem diameter extraction as an important parameter for forest inventory. The goal of this project was to develop methods, which are able to delineate trees and filter them. In a second step it should be investigated if the stem diameter of these trees is extractable directly from the data, instead of using species depended allometric solutions. Further it should be demonstrated on a prototype, that a fully automatic system can be implemented from the found solutions.

Shape change description of breasts caused by implants

In cooperation with Danielle Esme and Werner Beekman (Department of Plastic and Reconstructive Surgery,Tergooiziekenhuizen Hilversum)

Deformation analysis of the Rotterdam CS Tunnel with Terrestrial Laser Scanning

A research project of Roderik Lindenbergh were I was partly involved

The goal of this project is to develop methods that are able to detect and measure deformations on simple solid constructions, like tunnels. The difficult part of this project is, that deformations are in the order of the noise level of the terrestrial laser scanner. Up to now 3 epochs were scanned in the Rotterdam CS tunnel. And The analysis of the data is carried out mainly by Master students of Geomatics.