Clarke, A.P., Haas, R., Hawemann, F., Toy, V.G.
Virtual Outcrops and Samples
Virtual outcrop models are a fundamental part of my research and have become a common tool for many field-based structural geologists. Photogrammetry is a simple and mostly automated method to construct virtual outcrop models; however, the quality of these models can vary dramatically depending on how the photos were taken and the settings and procedures used in the photogrammetric software. My research empirically evaluates how image acquisition and model construction parameters influences model quality. The quality of a photogrammetric has a major impact on the accuracy of the analysis done on it; as such, my research also quantitatively investigates the accuracy and repeatability of photogrammetric surveys and I have developed methods to quantify the accuracy of models across scales.
Relevant publications
Selected Figures
Graphical Abstract
Graphical abstract showing influence of camera position and settings on photogrammetric model quality.
Comparisons between successful reconstructions
Selected photogrammetric models demonstrating successful reconstructions.
Network graphs of matched image pairs
Network graphs showing matched image pairs between different camera positions in each of the camera network configurations.
Perspective distortion at different camera positions
Demonstration of the perspective distortion seen between images at different camera positions illustrating the distortion that would affect all feature points on the sample.