摘要
三维数字体图像的仿射变换是体数据处理过程中的基本过程,其中插值是仿射变换的重要步骤之一。根据二维图像插值原理,将常用的插值法推广到三维数字体图像中。通过实验表明,三元三次内插法的插值效果最好,而三线性插值法,由于细节模糊,其峰值信噪比略低于最近邻插值法。
The interpolation is one of the important steps during affine transformation, which is the basic process in digital volume image （DVI） processing. Classical interpolation method is extended to DVI processing based on their principles. Experiments show that the ternary cu-bic interpolation is the best, and the PSNR of three linear interpolation method is lower than the nearest neighbor interpolation method as blurring of detail.
关键词
数字体插值
三线性插值法
三元三次内插法
DVI Interpolation
Three Linear Interpolation
Ternary Cubic Interpolation
