At quality 80-85 the difference is invisible at normal viewing distance and the file typically drops by 60-80%. The catch is that it is one-way: re-saving the WEBP repeatedly compounds the artefacts each time. Keep the BMP as the master and regenerate the WEBP from it whenever you need a new size. BMP根本不需要解码库,所以它仍然是嵌入系统和遗留Windows工具的安全交换格式。 WebP既提供损失模式,也提供无损失模式,其中任一模式都具有阿尔法透明度和动画。