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.