ISO/IEC 15948:2004

Information technology -- Computer graphics and image processing -- Portable Network Graphics (PNG): Functional specification

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English	HTML (845 kB)	CHF 180,00
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General information

Number of Pages: 80

Edition: 1 (Monolingual)	ICS: 35.140
Status: Published	Stage: 90.93 (2007-06-20)
TC/SC: JTC 1/SC 24

Abstract

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.

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