【作者】 邹小平；

【导师】 苏显渝；

【作者基本信息】 四川大学 ， 光学， 2003， 硕士

【摘要】 随着光电技术、数据获取方式和计算机CAD／CAM技术的发展，人类已经进入信息数字化时代。作为反向工程研究的一个领域，脚型测量便是实现对脚体全方位数字化描述的方法。本文围绕着脚型测量的各个过程进行了阐述，主要对多个线结构光传感器三维脚型测量系统中的系统校准、三维重建等过程进行了研究。目的在于为制鞋业提供一种快速获取个体消费者脚形三维数据的手段，作为制鞋计算机辅助设计的基础。本文研究的内容和成果如下：1．针对系统校准过程，本文提出了一种对多线结构光传感器三维测量系统的校准方法。只需对特殊设计的模块进行一次测量，便可完成对整个测量系统的校准。该方法能够有效的抑制激光散斑的影响，具有较高的系统精度。2．激光片光三维传感系统中，一个重要的问题便是如何克服激光散斑的影响。本文提出了两种激光片光三维传感中减小激光散斑影响，提高深度分辨率的办法。采用面内多帧平均和动态采集方式可以有效的抑制散斑噪声，综合利用这两种方式可以更好的提高测量精度。3．研究了光刀数据的三维重建和多传感器数据融合问题。针对受光照和物面形态影响而形成的不均匀结构光图像的处理，本文提出了一种基于光刀特性的图像分割方法，可以有效的处理不均匀光刀图像，提取出光刀的有效信息，效果明显。针对细化曲线后处理过程，本文提出了一种可以消除复杂分支的剪枝方法。该方法采用方向性和择优原则，不仅可以消除毛刺，而且具有很强的智能连断功能。最终，我们获得了可用于CAD／CAM的三维数字化数据。本文研究的方法和结论在类似的三维数字化领域也具有普遍的意义。本文的工作得到国家自然科学基金和中国制革制鞋工业研究院项目的资助。更多还原

【Abstract】 With the development of such technologies as photoelectricity, CAD/CAM and optical 3D measurement profilometry, we have stepped into the informational and digital world. As an instance of reverse engineering, shoes measurement realiezes the digitalization of the shoes.It presented how the shoes measurement carried out in this paper. Mainly research was made on the calibration of this 3D measurement system using muti-sensor with line structured-illuminated laser and the processing of 3D reconstruction. What we have achieved are as following :1. An easy and accurate method of system calibrating the 3D optical multi-sensor profilometry with line structured-illuminated laser is proposed in this paper. This method can efficiently and fastly carry out the transform between CCD pixel coordinate and world coordinate while required only once measurement for the special model. However, it avoids the multifarious survey of the system parameters. As proved by experiments, the present method can effectively restrain the influence of speckle to the laser triangular measurement system and the obtained calibration accuracy is about 0.05mm within 100mm depth range.2. Two Methods of reducing the speckle noise and improving the depth resolution in optical 3D profilometry with laser sheet are proposed in the paper. Speckle is caused by object’s micro-structure, with more less-correlated random structure co-interference in the imaging field, the speckle can be depressed greatly. As proved by experiments, combined the method of averaged in the plane and dynamic image capture ,the depth resolution can be double improved.3. With the difficulty to segment badly-illuminated structured images, we proposed a method based on the characteristic of laser sheet, and also we proposed a method of how to prune the thinning curves with much spikes and branches.更多还原