基于曲线演化的CT颅骨外轮廓提取

摘要

When reconstructing three-dimensional model of a skull based on contour lines, it was one of the primary problems to extract the single-deck and outer contour of the skull region accurately and effectively. For the difficulty of extracting such contour from the complex skull shape, this paper presented a method based on curve evolution. It firstly required to segment the image by a threshold to generate the skull region, and then initialized a single-deck and closed curve containing the region. Furthermore, evolved the curve using a novel differential equation. Lastly, extracted outer contour of the skull region. The results of experiences indicate that this method can automatically process the skull CT image, and accurately extract the single-deck and outer contour of the skull, at the same time, efficiently solve the problem of extracting the single-deck and outer contour of the skull.%准确有效地提取颅骨区域的单层外轮廓线是基于轮廓线颅骨三维模型重建的关键问题之一.针对颅骨复杂外形单层外轮廓提取困难,提出了一种基于曲线演化的方法.首先对图像进行阈值分割获得颅骨区域,然后初始化一条包括该区域的单层闭合曲线,对该曲线应用一种新的微分方程进行演化,最终获得颅骨区域的外轮廓线.实验结果表明,该方法可自动处理颅骨CT图像,准确获得颅骨的单层外轮廓,有效解决了颅骨单层外轮廓提取问题.