ACCURACY OF 3D RECONSTRUCTION IN AN ILLUMINATION DOME
- 1Dept. of Civil, Environmental and Geomatic Engineering (CEGE), UCL, London, UK
- 23D Optical Metrology (3DOM) unit, Bruno Kessler Foundation (FBK), Trento, Italy
Keywords: Photogrammetry, structure from motion, 3D test object, photometric stereo, digital elevation model
Abstract. The accuracy of 3D surface reconstruction was compared from image sets of a Metric Test Object taken in an illumination dome by two methods: photometric stereo and improved structure-from-motion (SfM), using point cloud data from a 3D colour laser scanner as the reference. Metrics included pointwise height differences over the digital elevation model (DEM), and 3D Euclidean differences between corresponding points. The enhancement of spatial detail was investigated by blending high frequency detail from photometric normals, after a Poisson surface reconstruction, with low frequency detail from a DEM derived from SfM.