将jfif图片名称转换成jpg图片名称 Convert JFIF image name to JPG image name.
The JPEG File Interchange Format (JFIF) is an image file format standard published as ITU-TRecommendation T.871 and ISO/IEC 10918-5. It defines supplementary specifications for the container format that contains the image data encoded with the JPEG algorithm. The base specifications for a JPEG container format are defined in Annex B of the JPEG standard, known as JPEG Interchange Format (JIF). JFIF builds over JIF to solve some of JIF's limitations, including unnecessary complexity, component sample registration, resolution, aspect ratio, and color space. Because JFIF is not the original JPG standard, one might expect another MIME type. However, it is still registered as "image/jpeg" (indicating its primary data format rather than the amended information).
JPEG文件交换格式（英语：JPEG File Interchange Format，简称JFIF）是一个图像文件格式标准。它是一种交换符合JPEG交换格式（JIF）标准的JPEG编码文件的格式。它解决了JIF在简单JPEG编码文件交换方面的一些限制。与所有符合JIF的文件一样，JFIF文件中的图像数据使用JPEG标准的技术压缩，因此JFIF有时被称为“JPEG/JFIF”。