See also:

• Computers: Algorithms: Compression  (78)
• Computers: Graphics: Web  (1,296)
• Computers: Software: Graphics  (2,285)

• PNG Specification   - The official W3C recommendation specification for PNG.

• APNG Specification - An extension of the PNG image format, adding support for animated images. Includes full specification including file structure and version changes.
• Explorer versus PNG (AlphaImageLoader) - Information on displaying transparent and translucent (alpha channel) PNGs in Internet Explorer and other browsers.
• PNG - Information, applications, and code relating to the PNG image format.
• PNG Resources of the Miscellaneous Persuasion - Links to images, mailing lists, test images, PNG and image compression documents, comics and websites using PNGs, the official site, and some unofficial resource sites.
• PNG Tips for Cartoonists - Article written to encourage cartoonists to use PNG and to share tips on exploiting PNG's strengths.
• PNG-Tech - A collection of comments, impressions, comparisons, experiments and ideas regarding the PNG (Portable Network Graphics) file format, and related technologies: ZLIB (Data Compression Format and Library), and MNG (Multiple-Image Network Graphics). It is focused on the compression algorithms used in PNG.
• Portable Network Graphics - PNG - Thorough introduction to PNG image format.
• The Sad Story of PNG Gamma Correction - Explains how PNG gamma "correction" causes color mismatches with other colors on web pages.
• W3C: PNG - W3C overview of PNG. Includes browser tests to see if gamma and alpha work correctly.

• Open Source Graphics with PNG - Joe Barr discusses PNG, the new open source file format, and the Unisys/CompuServe/GIF controversy. [LinuxWorld] (September 9, 1999)
• The Story of PNG - An article detailing the history of the PNG format. (February 29, 1999)