摘要
等值面绘制算法是医学图像表面重建的一种重要方法,但是它需要用户根据经验设定阈值。本文运用OTSU算法来获取体数据各类组织的灰度阈值,由此求得各类组织的灰度均值,并以此作为等值面阈值。在VTK中的重建实例表明,该方法能够体现出不同组织影像的灰度分布特点,使重建后的图像信息更丰富、表面更平滑。
Isosurface rendering algorithm that needs a user to define threshold with the help of experience is an important method for surface reconstruction of medical images.In this paper,OTSU algorithm is employed to automatically obtain the gray threshold of different kinds of tissues in 3-D volumetric data,which is subsequently used to calculate the gray mean of each kind of tissue,and finally this gray mean is considered as the threshold of isosurface.Tbe method is practically applied in VTK environment,and the result shows that it can reflect the characteristics of the gray distribution of different kinds of tissues,so the reconstructed surface is much smoother and contains more information.
出处
《计算机工程与应用》
CSCD
北大核心
2006年第6期230-232,共3页
Computer Engineering and Applications
