COMBINING PATTERN PROJECTION AND CROSS POLARIZATION TO ENHANCE 3D RECONSTRUCTION OF FEATURELESS REFLECTIVE SURFACES

3D digitisation is essential to enhance knowledge and conservation processes for Cultural Heritage (CH). However, movable heritagecollected in museums, e.g., archeological finds, statues, coins, and musical instruments, often consists of highly reflective surfacesand/or featureless textures. The aim of this work is to stress the Structure from Motion Dense MultiView Reconstruction (SfM-DMVR)of objects, whose optical properties are challenging to this image-based technique. To improve the results obtained by SfM-DMVRstandard acquisition workflow, this study exploited the potential of combining Noise Function Pattern (NFP) projection and light CrossPolarization (CP). Moreover, High Dynamic Range (HDR) image reconstruction was tested on images acquired according to differentCP angles. The SfM-DMVR of a texture-less shiny ceramic object was then compared to the one obtained by a structured lighttriangulation scanner, the most reliable tool for such surfaces, but unfortunately quite expensive. The advantages and limitations of thepresented method are discussed.