软件包：optipng（0.7.7-2 以及其他的）

advanced PNG (Portable Network Graphics) optimizer

OptiPNG is a PNG optimizer that recompresses the image files to a smaller size. It losslessly reduces the bit depth, the color type and the color palette of the image, runs a suite of compression methods and strategies, and selects the compression parameters that yield the smallest output file. It also recognizes several external file formats like BMP, GIF, TIFF and PNM (PBM, PGM, PPM).

标签: 实做语言: C, 用户接口: 命令行, 角色: role::program, scope::application, 范围: 实用程序, Purpose: 压缩, use::converting, works-with-format::png, 处理: 影像, 光栅影像

本页其他语言版本如下（如何设置默认文档语言）：