Definition of the Coordinate System of 3D Foot Model Using Regression Analysis and Improvement of the accuracy by the Free Form Deformation

Abstract

In order to design industrial products fitting well to the human body, it is necessary to make full use of information of human anatomical landmarks. However, the surface data, measured by 3D scanner, is not set the coordinate system. So, the specialists pasted the scannable markers to the parts of the body beforehand so as to set the coordinate system. Here, pasting the markers had the problems such as time consuming for the specialists and psychological load to the customers. We propose an automatic detection method of the basic landmarks used for defining the coordinate system, MT(metatarsale tibiale) and MF(metatarsale fiburale), from the point cloud of a human foot using regression analysis. Then the coordinate system of the foot model is defined by using these obtained MT and MF. Then, we attempt to improve the accuracy by the Free Form Deformation method.