![]() Seven main concerns were distinguished in the survey and further discussed by means of the case studies: (i) The printing process and materials, (ii) the necessary knowledge, (iii) the applicability, (iv) ethical considerations, (v) required work and costs, (vi) managing and storing data and (vii) the achieved results.Īlthough the main concerns are justified as there are many challenges to overcome, reassurance or first answers to these concerns have been found in the varied applications of 3D technologies presented in the case studies. The results of the questionnaire showed a positive trend towards 3D technologies in restoration projects. The conservation community was therefore asked to complete an online questionnaire (n = 153) and a literature study provided 65 case studies to demonstrate the practical use of 3D technologies for loss compensation. Although an increased use of 3D technologies is noticed in research, preservation, dissemination and conservation-restoration, the opinion, experience and concerns of the restorer on the application of 3D technologies in their work is unclear. A general state of the art is given concerning the adoption of 3D models in CH and for virtual reconstruction of missing parts in conservation-restoration work. Other methods cannot guarantee this.ģD technologies, including data acquisition, digital modelling and manufacturing, have been used in the context of cultural heritage (CH) since the 1990′s. The proposed method simultaneously protects the digitized image of the artwork while preserving its visual experience. The obtained 3D models were compared and the geometry deviation was measured to determine that the embedded error was invisible to an average observer and that the watermark can be extracted. The original sculpture was also digitized and its 3D model created. The clay details embedded in the sculpture are asymmetrical and discreet to be unnoticeable to an average observer. It is based on the digitization of the sculpture altered by adding local clay details proposed by the sculptor and on sharing on the Internet a 3D model obtained by digitizing the sculpture with a built-in error. The proposed method was applied to a sculpture, an object of cultural heritage. This research aims to suggest a method for protecting these 3D models from abuse while making them available on the Internet. Moreover, cultural institutions use modern digitization methods to create three-dimensional (3D) models of objects of historical significance to form digital libraries and archives. In recent years, digitization of cultural heritage objects, for the purpose of creating virtual museums, is becoming increasingly popular.
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