Portable Network Graphics (PNG /ˈpɪŋ/ PING) is a bitmapped image format that employs lossless data compression. PNG was created to improve upon and replace GIF (Graphics Interchange Format) as an image-file format not requiring a patent license.
PNG supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colors), grayscale images (with or without alpha channel), and full-color non-palette-based RGB images (with or without alpha channel). PNG was designed for transferring images on the Internet, not for professional-quality print graphics, and therefore does not support non-RGB color spaces such as CMYK.
PNG files nearly always use file extension PNG or png and are assigned MIME media type image/png; it was approved for this use by the Internet Engineering Steering Group on 14 October 1996. PNG was published as an ISO/IEC standard in 2004.
Read more about Portable Network Graphics: History and Development, PNG Working Group, File Size and Optimization Software
Famous quotes containing the words portable and/or network:
“Fewer and fewer Americans possess objects that have a patina, old furniture, grandparents’ pots and pans—the used things, warm with generations of human touch, ... essential to a human landscape. Instead, we have our paper phantoms, transistorized landscapes. A featherweight portable museum.”
—Susan Sontag (b. 1933)
“Parents need all the help they can get. The strongest as well as the most fragile family requires a vital network of social supports.”
—Bernice Weissbourd (20th century)