3D MODELING FROM GNOMONIC PROJECTIONS
- 1Politecnico di Milano, Department of Building Environment Science and Technology, Via M. d'Oggiono, 18/a, 23900 Lecco, Italy
- 2Tongji University, Department of Surveying and Geo-Informatics, 1239 Siping Road, 200092 Shanghai, P.R. China
Keywords: Gnomonic Projection, Matching, Orientation, Robust Estimation
Abstract. The paper presents a strategy able to derive and process high resolution images created by means of gnomonic projections. The implemented pipeline can be split into two phases: first, the sensor resolution of the camera is physically increased by acquiring and merging a set of images with a rotating camera equipped with a long focal lens; then the new set of gnomonic projections is processed with a 3D reconstruction methodology able to deal with very large images. Several issues are addressed in the paper, starting from image acquisition up to 3D modelling. Gnomonic projections have been demonstrated to be powerful tools when traditional pinhole images do not allow the reconstruction of small and fine details. Examples and comparisons aimed at determining the correctness of the mathematical approach for image orientation are illustrated as well.