Abstract: Since the existing methods of human foot outline three-dimensional reconstruction have the problems of low accuracy, poor robustness, high cost, and do not meet the actual requirements of the foot biomechanics research etc, a foot parameter measurement system which uses optical measurement technology and realizes non-contact measurement has been designed. On one hand, the system uses plantar scanning technology to construct the point cloud of plantar, segments plantar pressure area, and calculates the relevant parameters of plantar; on the other hand, the system uses line structured light to scan the foot surface to construct point cloud of foot surface, fuses into a whole foot contour point cloud, and finally, the system measures the series of foot parameters according to the definition of foot biomechanics. By the construction of the corresponding hardware platform, the measurements of multiple groups of foot are made, and the experimental results show that the system can finish foot 3D reconstruction quickly and accurately while has good robustness.

Key words: measurement of foot parameters, three-dimensional reconstruction of foot surface, line structured light scanning, plantar scanning

摘要： 针对现有足部轮廓三维重构方法精度低，鲁棒性差，成本昂贵且不符合实际足部生物力学研究要求等问题，设计了一种利用光学测量技术实现无接触式足部参数测量的系统。该系统一方面通过对足底扫描图像处理，构建足底轮廓点云，分割足底压力区域，计算足底相关参数；另一方面利用线结构光技术，重构足面轮廓，将足底轮廓点云与足面轮廓点云在系统规定世界坐标系内融合，形成完整足部轮廓点云，根据定义计算足部围度等足部系列参数。通过搭建相应硬件平台对多组人体足部进行测量，实验结果表明系统能够快速、精确地完成足部三维重构，具有很好的鲁棒性。

关键词: 足部参数测量, 足面三维重构, 线结构光扫描, 足底扫描