3D Face Analysis vs Applications: Studies and Perspectives Enrico VEZZETTI, Federica MARCOLIN, Sandro MOOS, Mariagrazia VIOLANTE, Luca ULRICH Dipartimento di Ingegneria Gestionale e della Produzione, Politecnico di Torino, Turin, Italy https://doi.org/10.15221/19.230 Abstract In the present scenario biometry is becoming a very important issue. Starting from the marketing domain where business man are trying to capture people emotions when they buy a product in the supermarket, till arriving to border security, or event security, where companies are trying to propose automatic solutions able to identify critical situations, and be sure that the identification of the person is reliable, also in presence of camouflages, the involvement of biometry is growing up very quickly, involving finger prints, iris recognition, voice recognition but especially human face analysis. In this specific domain many improvements have been done, due to the fact that face has many distinctive issues, and interesting results have been obtained, especially working with 3D models, rather than simple 2D images more fragile for the significant influence due to the working conditions, that are able to provide more reliable results and solve problems connected also with people age. Starting from these challenges, from the more easy availability of low cost 3D sensors, also located on commercial mobile devices, and from the experience acquired in the Politecnico di Torino 3D Lab (www.3dlab.polito.it), this papers wants to presents a review of the main outcomes coming from 3D face morphometric applications, providing a systematic synthesis of the different available methods and approaches in order to guide potential users in simply identifying the most suitable solution and technology in relation to the specific application and working conditions, providing some first issues on strengths and weaknesses. Keywords: Face Analysis, 3D Modelling, 3D Scanning, Human Body, Morphometry 1. Introduction In recent years a considerable number of applications have benefited from the usage of the third dimension [1]; there are several research fields in which 3D is currently successfully used: safety, such as for autonomous driving [2]; orthopedics, for both diagnosis and treatment planning [3]; surgery, as 3D models reconstruction gives the possibility of organizing medical equipment [4], attending the surgeon during the intervention and supporting the post-operative evaluation of the results [5]; 3D printing applications [6], including facial prosthesis [7], dental implants [8] and pelvis prosthesis [9]. The ambition of accelerating the evolution process of cities into interconnected communities brings out other application areas as candidates for heavy 3D usage: security, such as the screening monitoring system in public places such as airports [10], land surveying [11], architecture [12] and archaeology [13] for research and tourism purposes. Despite the idea has come out in '90s, the concept of “smart city” has been extensively examined in last decade [14] [15] [16] [17], thanks to the increasing possibility of being connected to the rest of the world; an example is the Singapore case [18]. It is reasonable to expect an increment of the number of smart cities and the strengthening of the existing ones, such as Amsterdam [19], Dubai [20] [21] and Dohlera [22], taking advantage from the Internet coverage diffusion. Robustness has been mentioned above to highlight the possibility of operating in critical lighting conditions, since active 3D technologies work with infrared light or other sources of light outside the visible spectrum, in presence of occlusions [23] [24] and regardless of the orientation of the object or, most likely, of the subject [25]. As it will be better explained in the next section, facial applications are shiny examples of this consideration, since the face acquisition can be performed in different conditions depending on various usage scenarios. Literature about 3D is varied and fragmented due to lack of a shared methodology for analyzing the field and developing new applications. This scientific survey has been conducted to converge on a unique standard and to provide a baseline for the design of 3D facial applications. Proceedings of 3DBODY.TECH 2019 10th Int. Conference and Exhibition on 3D Body Scanning and Processing Technologies, Lugano, Switzerland, 22-23 Oct. 2019 - 230 -