The systematic investigation of complex and dynamically modified surfaces is carried out at the Institute of Fluid Mechanics and Aerodynamics with the aid of an imaging measurement method. One possible area of application is the adaptation of the form and profiling of the wings of free-flying falcons during the flapping and maneuvring flight. The scientific question is to develop and further improve a measurement method that allows the non-contact determination of the surface of objects to be measured with adequate local and temporal resolution. The following objectives are pursued for this purpose:
  • The spatial resolution of the determined point clouds is to be increased by using optical flow instead of correlation-based evaluation methods.
  • The evaluation of the data is to be carried out fully automatically after an initial calibration and includes the determination of correspondence points, the calculation of closed displacement fields and the triangulation of a 3D point cloud of the falcon surface.
  • In order to minimise the influence of the falcon during the measurements, the natural texture of the plumage should be used instead of artificially applied or projected patterns.
  • By adding more cameras, the number of outliers is to be reduced and local accuracy improved.
  • To reduce the computing effort, the required processes are to be partially outsourced to a high-performance GPU.
The above-mentioned goals are continuously being developed and improved. The deformation measurement thus allows a reconstruction of a three-dimensional point cloud, which is suitable for further evaluations and works with sufficient accuracy.
Person in charge: M.Sc. Martin Heinold