双线性插值，可用于图像的放大，及对像素颜色的插值，能产生光滑的过渡效果-Bilinear interpolation can be used to enlarge the image, and the color of the pixel interpolation, to produce a smooth transition effect

1. Image reduction: ? Alternative line reduction ? Fractal linear reduction to reduce images to any smaller size 2. Use two images to perform image enlargement: ? Pixel replication ? Nearest enlargement ? Bilinear interpolation ? Bicubic interpolatio