664 Portable Network Graphics 1.0 PNG (1.0) Image (Raster) Portable Network Graphics (PNG) was designed for the lossless, portable, compressed storage of raster images. PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-color, grayscale, and truecolor images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits. PNG is designed to work in online viewing applications, so it is fully streamable. It can store gamma and chromaticity. PNG also detects file corruption. Binary Big-endian (Motorola) 180 The National Archives and Records Administration / The National Archives and Records Administration 11 Mar 2005 Specifications link: http://tools.ietf.org/pdf/rfc2083.pdf 11 Jun 2012 fmt/11 PUID image/png MIME public.png Apple Uniform Type Identifier 761 png File extension 58 PNG 1.0 Signature + IHDR chunk at BOF, IEND chunk at EOF 161 Absolute from BOF 0 0 89504E470D0A1A0A0000000D49484452 162 Absolute from EOF 0 4 0000000049454E44AE426082 Has lower priority than 665 Portable Network Graphics 1.1 Has lower priority than 666 Portable Network Graphics 1.2 Has lower priority than 1740 Animated Portable Network Graphics Is previous version of 665 Portable Network Graphics 1.1 1 nurbcup2si.png W3C PNG 1.0 reference file: Indexed color (palette) image. It is interlaced, so suitable software can give a progressive display. www.w3.org/Graphics/PNG/nurbcup2si.png URL 2 666.png W3C PNG 1.0 reference file: Large truecolor image generated by a raytracer - a visualisation of a 6 by 6 by 6 color cube in CIE LUV color space. www.w3.org/Graphics/PNG/666.png URL Image Width Instance Image Height Instance Bits Per Sample Instance Samples Per Pixel Instance Number Of Channels Instance Criteria