三维图像中拓扑变形的动作稳定性测量模型

Stable Measurement of Topological Deformation Action in Three-Dimensional Images

三维图像中动作拓扑变形的稳定性测量,对于提高三维图像质量具有重要的意义。在三维图像中拓扑变形的过程中发现,由于拓扑变形是非线性的,极易造成像素点缺失,造成拓扑变形动作的可测量稳定性降低。提出一种基于插值定位算法的三维图像中拓扑变形动作稳定性测量方法。利用二次映射的方法对插值点进行定位,利用积分图像的方法计算空点相邻区域的像素点集合的标志位之和,并将其设置为插值点的权重,获得插值点的准确定位,利用三次卷积的方法对空点进行填充,提高了三维图像拓扑变形动作的稳定性,保证了拓扑变形测量的准确性,提高了三维图像的逼真度。实验结果表明了改进算法能够提高拓扑变形测量的准确性。

A stable measurement method of topological deformation action in three-dimensional image is presented based on interpolation localization algorithm. The interpolation point is positioned by using the quadratic mapping method, a sum of the pixel point set of the adjacent area of empty points is calculated by using the integral image method, and it is set to the weight of the interpolation points, the accurate positioning of interpolation points is ob- tained, the empty points are filled by using the cubic convolution, the stability of three-dimensional image topological deformation action is improved, the accuracy of the topological deformation measurement is ensured, and the fidelity of the 3d image is improved. The experimental results show that the improved algorithm can improve the accuracy of the topological deformation measurement.