三次插值是一种更加复杂的插值方式，它能创造出比双线性插值更平滑的图像边缘。双三次插值方法通常运用在一部分图像处理软件、打印机驱动程序和数码相机中，对原图像或原图像的某些区域进行放大。(Cubic interpolation is a more complex interpolation method that creates a smoother image edge than a bilinear interpolation.
The double cubic interpolation method is usually used in some image processing software, printer driver and digital camera to enlarge some areas of the original image or original image.)