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 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.
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—Charles Dickens (18121870)
“Of what use, however, is a general certainty that an insect will not walk with his head hindmost, when what you need to know is the play of inward stimulus that sends him hither and thither in a network of possible paths?”
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