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2 definitions found
 for PNG
From V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016) :

         Portable Network Graphics [format] (RFC 2083)

From The Free On-line Dictionary of Computing (30 December 2018) :

  Portable Network Graphics
      /ping/ (PNG) An extensible file format for the
     lossless, portable, well-compressed storage of raster
     images.  PNG provides a patent-free replacement for GIF and
     can also replace many common uses of TIFF.
     Indexed-colour, greyscale and truecolour images are
     supported, plus an optional alpha channel.  Sample depths
     range from 1 to 16 bits.
     PNG is designed for on-line viewing applications, such as the
     World Wide Web, so it is fully streamable with a
     progressive display option.  PNG is robust, providing both
     full file integrity checking and simple detection of common
     transmission errors.  Also, PNG can store gamma correction
     and chromaticity data for improved colour matching on
     heterogeneous platforms.
     Filename extension: .png.
     RFC 2083.  W3C PNG pages
     http://w3.org/Graphics/PNG/)">(http://w3.org/Graphics/PNG/).  PNG home page

Contact=webmaster@dict.org Specification=RFC 2229