PNG File Format
   
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    GraphicsAcademy.com  >  File Formats  >  Portable Network Graphics

       

     

    PNG File Format

    Short Name PNG
    Long Name Portable Network Graphics
    Typical File Extensions .png
    Contains Bitmap
    PNG (pronounced "ping") is a format for storing bitmaps that was in part designed as a superior replacement for GIF (part of the reason for PNG's development was the use of a patented LZW compression algorithm in GIF, which attracted considerable controversy - consequently PNG's unofficially stands for "PNG's Not GIF").

    PNG supports vastly more color options than GIF, including: Additionally, PNG supports interlacing, alpha transparency, and a variety of features to detect network transmission errors.

    What's more PNG files are usually smaller, because of better compression, than GIF files.

    However, there are some limitations with PNG files:
    • Browser support of PNG has been patchy, and in particular Microsoft's Internet Explorer (and the AOL and MSN Browsers which use Internet Explorer as underlying technology) have had a number of problems with PNGs, especially with transparency. For detailed information on this issue, see PNG-supporting Browsers.

    • PNG does not support animations (unlike GIF). Moreover, while a closely related format, MNG, is being developed for this purpose, it is currently not widely supported by browsers, without additional software (which, of course, most users won't have).

    Discuss PNG File Format


       

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