指定将源图像数据转换成压缩图像数据的过程、将压缩图像数据转换为重建图像数据的进程、压缩图像数据编码表示，并就如何在实践中实现这些过程提供指导。适用于连续色调灰度或彩色数字静态图像数据，并适用于需要使用压缩图像的广泛应用。不适用于双层图像数据。

Specifies processes for converting source image data to compressed image data, processes for converting compressed image data to reconstructed image data, coded representations for compressed image data, and gives guidance on how to implement these processes in practice. Is applicable to continuous-tone - grayscale or colour - digital still image data and to a wide range of applications which require use of compressed images. Is not applicable to bi-level image data.