Moreover, the edges of image include the most important information in the image, and it is the one of most important characters in image. The bug in the edge of image will affect the vision effect of image seriously.

• 而图像边缘包含了一幅图像中最重要的信息，是图像最重要的特征之一，图像边缘的缺陷将严重影响插值后图像的视觉效果。