用于二维平面的闭合曲线三次插值，通过给定的几个坐标点，完成闭合曲线的三次插值函数-Closed curve cubic interpolation for two-dimensional plane, through a given number of coordinate points, complete the closed curve cubic interpolation function

基于c++和qt实现的三线性插值，qt界面可进行参数设置，并对进行插值和保存，使用于序列图片，如ct等，三维线性插值-Based on c++ and QT implementation of the three linear interpolation, QT interface can be set up, and the interpolation and preservation, the use of sequence images, such as CT, 3D linear int