一种新的处理非封闭图像表面的三维表面提取算法研究

Development of a New Method for Extracting Surface with Open Form from Volumetric Images

对皮下组织表面 ,例如表皮·真皮组织交界面进行定性和定量的检测已经越来越成为医学、生物学等诸多学科中有关人体皮肤的课题中不可或缺的重要研究手段 在利用计算机自动检测皮下组织表面的过程中 ,涉及到的一个关键问题就是如何从图像中提取边界成分 动态边界模型 (snake)作为一种边界提取算法被广泛地应用于这类问题中 在这个算法的基础上 ,提出了可以从断层图像中将对象的三维表面提取出来的算法———动态开放表面模型 并应用此算法开发了一套皮下组织表面自动提取重建系统 通过对共焦点显微镜断层图像处理的实验 。

Analysis of the dermo-epidermal surface in three-dimensions is important for evaluating cosmetics. One approach is based on the active contour model,which is used for extracting local object boundaries with closed curve form. The dermo-epidermal surface,however,is a plane with open form. Developed in this paper is a method of automatically extracting the dermo-epidermal surface from volumetric confocal microscopic images,as well as constructing a 3-D visual model of the surface by using the geometric information contained in the control points. This method is a 3-D extension of the active contour model,so it is called active open surface model (AOSM). The initial surface for AOSM is an open curve plane,guided by a 3-D internal force,a 3-D external constraint force,and a 3-D image force,which pull it toward the objective surface. The proposed technique has been applied to extract actual dermo-epidermal surface in the given volumetric confocal microscopic images.