Smartphone‐based close‐range photogrammetric assessment of spherical objects

This study was partially supported by grant number ACIF/2017/056 from the Conselleria d'Educacio of the Generalitat Valenciana and the European Social Fund. The authors also acknowledge the support from the 2017 Subprogram B No. B03 (HEAD3D++) to the development of coordinated actions between the Universitat Politecnica de Valencia and the Hospital Universitari i Politecnic/Instituto de Investigacion Sanitaria La Fe.