COMPUTER-IMPLEMENTED METHOD FOR INDIVIDUALISING A SPECTACLE FRAME ELEMENT BY DETERMINING A PARAMETRIC SUBSTITUTION MODEL OF A SPECTACLE FRAME ELEMENT, AND DEVICE AND SYSTEMS USING SUCH A METHOD

摘要

The invention relates to a computer-implemented method (10, 10', 10") for individualising a spectacle frame element (24) by adapting a parametric model of a spectacle frame element (24) to the head of a spectacles-wearer. A parametric substitution model, having at least one parameter, for the parametric model of the spectacle frame element (24) is determined by specifying a plurality of instances (30) of the parametric model in the form of realisations of the parametric model using concrete parameter values, at least one basic instance (38) and at least one parametric deformation map for the at least one basic instance (38) are determined from the predefined instances (30), the at least one parametric deformation map mapping the at least one basic instance (38) to instances (30) of the parametric model, and the parametric substitution model being determined at least from the at least one basic instance (38) and the at least one parametric map. Biometric data relating to the head of the spectacles-wearer are determined, and at least one parameter value is determined for the at least one parameter of the parametric substitution model of the spectacle frame element (24) by optimising a function that considers at least one surface point of a determined basic instance (38) of the parametric substitution model of the spectacle frame element (24) and determined data (31) relating to the head of the spectacles-wearer.