Imagemagic是一款创建、编辑、压缩图像的软件。可以转换 DPX, EXR, GIF, JPEG, JPEG-2000, PDF, PhotoCD, PNG等格式，并且能够轻松的对图片进行旋转，缩放等操作-ImageMagick® is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (

libpng（PNG库）是一种用于创建和修改PNG格式图形文件的工具。PNG格式可以在较小程度上替代GIF、TIFF格式，并且有很多改进和延伸。-libpng (PNG library) is a way to create and modify PNG format graphics files tool. PNG format can be an alternative to a lesser extent, GIF, TIFF format, and there are many modi