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An extension of the PNG image format, adding support for animated images. Includes full specification including file structure and version changes.
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Information on displaying transparent and translucent (alpha channel) PNGs in Internet Explorer and other browsers.
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Displays an image within the boundaries of the object and between the object background and content, with options to clip or resize the image. When loading a Portable Network Graphics (PNG) image, transparency from zero to 100 percent is supported.
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Joe Barr discusses PNG, the new open source file format, and the Unisys/CompuServe/GIF controversy. [LinuxWorld]
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Information, applications, and code relating to the PNG image format.
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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.
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The official W3C recommendation specification for PNG.
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Article written to encourage cartoonists to use PNG and to share tips on exploiting PNG's strengths.
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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.
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Thorough introduction to PNG image format.
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Explains how PNG gamma "correction" causes color mismatches with other colors on web pages.
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An article detailing the history of the PNG format.
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W3C overview of PNG. Includes browser tests to see if gamma and alpha work correctly.
