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Portable Network Graphics

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Article Genealogy
Parent: arithmetic coding Hop 4
Expansion Funnel Raw 60 → Dedup 0 → NER 0 → Enqueued 0
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Portable Network Graphics
NamePortable Network Graphics
Extension.png
OwnerWorld Wide Web Consortium
StandardRFC 2083

Portable Network Graphics is a raster graphics file format that supports lossless data compression, which was created as a replacement for the Graphics Interchange Format by Oliver Fromme, Thomas Boutell, and John Carmack. The format was designed to be a non-patented alternative to the Graphics Interchange Format, which used the Lempel-Ziv-Welch algorithm, patented by Unisys. The development of the format involved Adobe Systems, Apple Inc., IBM, Intel Corporation, Microsoft, Netscape Communications Corporation, and Sun Microsystems. The format is widely supported by web browsers such as Google Chrome, Mozilla Firefox, and Safari (web browser).

Introduction

The introduction of the format was a significant milestone in the development of the World Wide Web, as it provided a way to display high-quality images on web pages without the need for plug-ins or other additional software. The format is supported by a wide range of image editing software, including Adobe Photoshop, GIMP, and Microsoft Paint. The use of the format has been promoted by organizations such as the World Wide Web Consortium, which has published recommendations for the use of the format on the web. The format has also been used in a variety of applications, including video games such as Doom (1993 video game) and Quake (video game).

History

The history of the format dates back to the mid-1990s, when Oliver Fromme and Thomas Boutell began working on a replacement for the Graphics Interchange Format. The development of the format involved a number of companies and individuals, including John Carmack, who contributed to the development of the format. The format was first released in 1996, and it quickly gained popularity as a replacement for the Graphics Interchange Format. The format has undergone a number of revisions since its initial release, with the most recent version being released in 2003. The development of the format has involved organizations such as the Internet Engineering Task Force and the World Wide Web Consortium.

Technical_details

The technical details of the format are based on a combination of the Lempel-Ziv-Welch algorithm and the Huffman coding algorithm, which provide a high level of compression without losing any data. The format uses a bit depth of up to 16 bits per color channel, which allows for a wide range of colors to be displayed. The format also supports transparency and animation, which makes it suitable for use in a variety of applications. The format is supported by a wide range of operating systems, including Windows, macOS, and Linux. The format has been used in a number of projects, including the Apache HTTP Server and the X Window System.

Features

The features of the format include support for lossless data compression, which means that the data is not lost during the compression process. The format also supports transparency, which allows for the creation of images with transparent backgrounds. The format supports animation, which makes it suitable for use in a variety of applications, including video games and web pages. The format is also supported by a wide range of image editing software, including Adobe Photoshop and GIMP. The format has been used in a number of projects, including the Wikipedia and the Wikimedia Commons.

Applications

The applications of the format are diverse and widespread, ranging from web pages to video games. The format is widely used in web development due to its support for transparency and animation. The format is also used in a number of video games, including Doom (1993 video game) and Quake (video game). The format has been used in a number of projects, including the Apache HTTP Server and the X Window System. The format is supported by a wide range of operating systems, including Windows, macOS, and Linux. The format has been used by organizations such as the NASA and the European Space Agency.

Comparison_to_other_formats

The comparison to other formats, such as the Graphics Interchange Format and the JPEG format, shows that the format has a number of advantages, including support for lossless data compression and transparency. The format is also widely supported by web browsers and image editing software, which makes it a popular choice for use in a variety of applications. The format has been used in a number of projects, including the Wikipedia and the Wikimedia Commons. The format is supported by a wide range of organizations, including the World Wide Web Consortium and the Internet Engineering Task Force. The format has been used by companies such as Google, Microsoft, and Apple Inc..

Category:Graphics file formats