Modelling the appearance of heritage metallic surfaces

Modelling the appearance of heritage metallic surfaces

Blog Article

Polished metallic surfaces exhibit a high degree of specularity, which makes them difficult to reproduce accurately.We have applied two different techniques for modelling a heritage object known as the Islamic handbag.Photogrammetric multi-view stereo enabled a dense point cloud to be extracted from a set of photographs with calibration targets, and a Hayward HCP 3000 Series Parts geometrically accurate 3D model produced.A new method based on photometric stereo from a set of images taken in an illumination dome enabled surface normals to be generated for each face wooden board of the object and its appearance to be rendered, to a high degree of visual realism, when illuminated by one or more light sources from any angles.The specularity of the reflection from the metal surface was modelled by a modified Lorentzian function.