图像缩放（image scaling）是指对数字图像的大小进行调整的过程。图像缩放是一种非平凡的过程，需要在处理效率以及结果的平滑度（smoothness）和清晰度（sharpness）上做一个权衡-Image zooming (image scaling) refers to adjust the size of the digital image process. Image zooming is a non-trivial process, needs the results of processing efficiency and smoothness (smoothness) and clarity (sharpness) do a trade-off