.png "1 png image")
Machines used to originate and display the image. Images with correct brightness/contrast regardless of the * Image gamma information, which supports automatic display of
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* Full alpha channel (general transparency masks). * Grayscale images of up to 16 bits per pixel. * Truecolor images of up to 48 bits per pixel. Important new features of PNG, not available in GIF, include: * Complete hardware and platform independence. * Ancillary information: textual comments and other data can be Transparent, creating the effect of a non-rectangular image. * Transparency: portions of the image can be marked as Yielding a low-resolution image very quickly followed by * Progressive display: a suitably prepared image file can beĭisplayed as it is received over a communications link, Protocol for on-the-fly generation and display of images. * Streamability: files can be read and written serially, thusĪllowing the file format to be used as a communications * Indexed-color images of up to 256 colors. GIF, the design provides some useful new features not available in The PNG format provides a portable, legally unencumbered, well-Ĭompressed, well-specified standard for lossless bitmapped imageĪlthough the initial motivation for developing PNG was to replace
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RFC 2083 PNG: Portable Network Graphics March 1997 1. RFC 2083 PNG: Portable Network Graphics March 1997 9.5. cHRM Primary chromaticities and white point. RFC 2083 PNG: Portable Network Graphics March 1997 2.8. This specification defines the Internet Media Type image/png.ġ. PNG can store gamma and chromaticity data for improved color matching PNG is robust, providing both full file integrityĬhecking and simple detection of common transmission errors. The World Wide Web, so it is fully streamable with a progressiveĭisplay option. PNG is designed to work well in online viewing applications, such as
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Grayscale, and truecolor images are supported, plus an optional alphaĬhannel. GIF and can also replace many common uses of TIFF. PNG provides a patent-free replacement for This document describes PNG (Portable Network Graphics), anĮxtensible file format for the lossless, portable, well-compressed Property Rights statements contained in this document. The IESG takes no position on the validity of any Intellectual
This memoĭoes not specify an Internet standard of any kind. This memo provides information for the Internet community. PNG (Portable Network Graphics) Specification Version 1.0 Request for Comments: 2083 Boutell.Com, Inc.
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