因工作需要，得处理一张7872x5904体积为178MB的图片，格式为TIFF。 网上搜了半天，找到一个名为OptiPNG的软件，主要为PNG优化，但也支持TIFF格式。 下面是OptiPNG的官方介绍 OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections. OptiPNG可以将PNG文件重新压缩，压缩后体积变得更小，并且不会丢失任何信息。同时optipng还支持其他格式的图片，如BMP、GIF、PNM和TIFF。 至于OptiPNG的威力如何，请看本次实例 root@raspi:~# ls -lh huxian.tif -rw-r–r– 1 root root 178M Apr 4 16:54 huxian.tif //原始文件178MB root@raspi:~# optipng huxian.tif ** Processing: huxian.tif Importing TIFF 7872x5904 pixels, 4x8 bits/pixel, RGB+alpha //分辨率7872x5904 Reducing image to 3x8 bits/pixel, RGB Input file size = 186000368 bytes Trying: zc = 9 zm = 8 zs = 0 f = 0 IDAT size = 4273133 Selecting parameters: zc = 9 zm = 8 zs = 0 f = 0 IDAT size = 4273133 Output file: huxian.