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 Overview

Portable Network Graphics (PNG) was created in response to the GIF licensing debacle and is optimized for graphics use on the Internet and other on-line services. PNG supports image depths up to 24-bit and provides a better lossless compression than that found in GIF files. PNG has been accepted as an image standard by the WWW Consortium and is slowly being integrated into the major web browsers including Netscape and Internet Explorer.

Group 42 is one of the PNG authors and helped develop the specification for the image format. Also, Group 42 developed the PNG Library, a c-code library that vendors can utilize to implement the PNG specification. This library is available free from Group 42.

Key Features
Bullet 100% lossless compression
Bullet Better compression than GIF/LZW method
Bullet True Color images up to 48 bits per pixel
Bullet Gray Scale images up to 16 bits per pixel
Bullet Full Alpha Channel and transparency support
Bullet Palette-mapped images to 256 colors
Bullet Streamability and progressive display
Bullet Complete hardware and platform independence

If you are an end-user, we hope you realize the benefits of the PNG format and begin to utilize PNG image files. If you are a developer of graphics applications, we hope you consider adding support for PNG in your application. The Developer's Area provides the information required to implement the PNG format.
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