All the data collected here have been kindly provided by Hans Wellens, a Belgian orthodontist and Ph.D. at Radboud University Nijmegen in the Netherlands. Together with other researchers from different universities of Belgium and Netherlands, he developed a custom-built photogrammetry system for 3D facial capture to be used for Orthodontics. Their work aimed at providing a cheaper while still competitive solution with respect to other state-of-the-art systems already available on the market.
The article of the project has been recently published in the American Journal of Orthodontics and Dentofacial Orthopedics (Volume 158, Issue 2, August 2020).