摘要： 给出了一种图像尺寸放大的新方法，该方法利用了线性相位二维不可分离的FIR插值滤波器，与最近邻域法、双线性插值法、双三次样条插值法、三次B－样条插值法、子序列fft内插法等相比，该方法可以获得更好的放大结果，实验结果和理论分析也表明了这点。

关键词: 上采样, 下采样, 二维不可分离插值滤波器

Abstract: In this paper, a new way to image size zooming is proposed. The algorithm to design two dimensional nonseparable linear phase finite-impulse response (FIR) interpolation filter is given. Comparing with the nearest neighbor interpolator, the bilinear interpolator, the bicubic interpolator and the cubic B-spline interpolator methods, this interpolator algorithm is better according to the experimental effects and theoretical analysis.

Key words: Upsampling, Downsampling, 2-D nonseparable FIR interpolation filter