Portable Network Graphics

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Portable Network Graphics

(file format)
/ping/ (PNG) An extensible file format for the lossless, portable, well-compressed storage of raster images. PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-colour, greyscale and truecolour images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits.

PNG is designed for on-line viewing applications, such as the World Wide Web, so it is fully streamable with a progressive display option. PNG is robust, providing both full file integrity checking and simple detection of common transmission errors. Also, PNG can store gamma correction and chromaticity data for improved colour matching on heterogeneous platforms.

Filename extension: .png.

RFC 2083. W3C PNG pages. PNG home page.
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Portable Network Graphics (PNG) is a common and established image standard that is widely supported in applications that view images, including Internet Explorer.
Ltd, which enables a more robust multimedia experience through the animation of portable network graphics (PNG) files.
A recent W3C study showed that when used in tandem, the W3C's innovations in CSS along with Portable Network Graphics (PNG) and HTTP/1.

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