A method and a system for positioning and deforming a foot model

Abstract

The invention relates to a method and a system for positioning and deforming a foot model. The method comprises the following steps: extracting a sole contour line of a foot triangular mesh model andidentifying an inner and outer waist position of the sole; extracting the side contour of the foot from the triangular mesh model, identifying the heel centerline position curve and the instep centerline position curve; moving Tthe whole triangular mesh model to adjust the azimuth to make the coordinate system of the model match the space rectangular coordinate system to obtain the coordinate value of the corresponding feature points; obtaining, from the spatial rectangular coordinates, the palm width, heel width, foot length, instep height, first toe height and ankle height data. Thus, in thestandard shoe last database, the system automatically matches the most suitable standard shoe last by manually selecting the heel height, shoe type, gender and region options, automatically identifying the characteristic line data of the characteristic points on the reconstructed foot triangular mesh model, and selecting the shoe last group with the highest matching degree with the reconstructeduser foot model according to the standard foot last difference value, and the system automatically matches the most suitable standard shoe last.

Description

technical field [0001] The invention relates to shoe last model construction technology, in particular to a foot model positioning and deformation method and system. Background technique [0002] The human foot is prone to deformation and difficult to be in a static state. If the point cloud data of the foot is obtained using a contact measuring device, the probe of the measuring device will squeeze the instep during the measurement process, deforming the shape of the human foot. When the human foot is damaged, it also causes some errors in the measured human foot point cloud. Moreover, the use of contact measurement equipment requires the human foot to be in a specific position all the time, and the device needs to be used to fix it on the workbench. When measuring, the human foot also needs to move with the workbench. It is difficult for the human foot to achieve these requirements. As a result, many foot feature parameters and some complex surfaces and curves cannot be m...

AI Technical Summary

Problems solved by technology

[0003] However, most of the existing shoe last model reverse reconstruction file formats are point cloud models and NURBS surface models generated by the boundary blending method or facet feature method. Multiple redundant points, large storage space, difficult data management and analysis, which is not conducive to real-time processing of models

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