生成图片的缩略图。从任意一张尺寸的原始图片生成任意大小的缩略图，可以重命名。还能够窃取图片中任意位置大小的图片。-Generate thumbnails of the pictures. Generate thumbnails of any size from any one size of the original picture, you can rename. Also be able to steal a picture anywhere on the size of the pictu