Visual documentation of interpretative processes with vertex colour maps in 3D Modelling for Cultural Heritage

This contribution explores a workflow for the visual documentation of human interpretative processes that influence the real-based 3D reconstruction of cultural heritage artefacts acquired through photogrammetry or scanning techniques, using vertex color maps. In this context, vertex color maps are used to identify and compare the original gaps of the raw model (RAWp) generated through Structure from Motion (SfM) processing with enhancements made to obtain an integrated high-resolution Digital Cultural Heritage Object (DCHO). This technique is currently being tested in the workflow for creating the digital twin for the temporary exhibition "The Other Renaissance: Ulisse Aldrovandi, the Wonders of the World." It aims to be implemented for the core case involving the digitisation of a part of the collection from the Capellini Museum collection in Bologna. Furthermore, integrating color data into the vertices streamlines rendering by reducing the need for separate texture maps. This method is especially beneficial for dense meshes, as it simplifies workflows and improves performance in 3D modeling and real-time applications. The approach not only improves interpretative clarity in 3D modeling but also supports a standardized, reproducible workflow for future projects. To further enhance accessibility and scholarly exchange, the digital artefacts produced through this workflow are published on the open-source ATON framework, ensuring their availability for both dissemination and academic purposes, while maintaining the historical and artistic accuracy of the digital cultural heritage models.