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PNG - Wikipedia, the free encyclopedia (2947 words) |
 | PNG was created to both improve upon and replace the GIF format with an image file format that does not require a patent license to use. |
| Version 1.0 of the PNG specification was released on July 1, 1996, and later appeared as RFC 2083. |
| PNG is a better choice than JPEG for storing images that contain text, line art, or other images with sharp transitions that do not transform well into the frequency domain. |
| Portable Network Graphics (PNG) Specification (Second Edition) (10571 words) |
| PNG decoders are strongly encouraged to use this information, plus information about the display system, in order to present the image to the viewer in a way that reproduces as closely as possible what the image's original author saw. |
| PNG standardizes one filter method and several filter types that may be used to prepare image data for compression. |
| PNG compression method 0 is deflate/inflate compression with a sliding window (which is an upper bound on the distances appearing in the deflate stream) of at most 32768 bytes. |
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