ISO/IEC 15948:2004

Information technology — Computer graphics and image processing — Portable Network Graphics (PNG): Functional specification ISO/IEC 15948:2004

Publication date:   Mar 3, 2004

General information

90.93 Standard confirmed   Aug 5, 2021

ISO/IEC

ISO/IEC JTC 1/SC 24 Computer graphics, image processing and environmental data representation

International Standard

35.140   Computer graphics

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Scope

ISO/IEC 15948:2004 specifies a datastream and an associated file format, Portable Network Graphics (PNG, pronounced "ping"), for a lossless, portable, compressed individual computer graphics image transmitted across the Internet. Indexed-colour, greyscale, and truecolour images are supported, with optional transparency. Sample depths range from 1 to 16 bits. PNG is fully streamable with a progressive display option. It is robust, providing both full file integrity checking and simple detection of common transmission errors. PNG can store gamma and chromaticity data as well as a full ICC colour profile for accurate colour matching on heterogenous platforms. ISO/IEC 15948:2004 defines the Internet Media type "image/png". The datastream and associated file format have value outside of the main design goal.

Life cycle

NOW

PUBLISHED
ISO/IEC 15948:2004
90.93 Standard confirmed
Aug 5, 2021