PNG

Portable Network Graphics
bitmapped image format and video codec
lossless data compression
No patent license

Internet Engineering Steering Group
October 14, 1996.

ISO/IEC standard, 2004

File extension
.PNG
.png

MIME media type
image/png

PNG's Not GIF

Improved/replaced GIF (Graphics Interchange Format)
Transferring images on the Internet
non-professional-quality print graphics

Palette-based images

24-bit RGB colors
32-bit RGBA colors
grayscale images (with or without alpha channel)
RGB[A] images (with or without alpha channel)
no non-RGB color spaces

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