三次样条插值（简称Spline插值）是通过一系列形值点的一条光滑曲线，数学上通过求解三弯矩方程组得出曲线函数组的过程。-Cubic spline interpolation (referred Spline interpolation) is derived by solving the equations of the three-moment curve function group through a series shaped value point of a smooth curve, mathematical process.