BS ISO/IEC 15444-2:2004 defines a set of lossless (bit-preserving) and lossy compression methods for coding continuous-tone, bi-level, grey-scale, colour digital still images, or multi-component images.
This standard:
specifies extended decoding processes for converting compressed image data to reconstructed image data
specifies an extended codestream syntax containing information for interpreting the compressed image data
specifies an extended file format
specifies a container to store image metadata
defines a standard set of image metadata
provides guidance on extended encoding processes for converting source image data to compressed image data
provides guidance on how to implement these processes in practice.