Wavelet transform#Wavelet compression

Wavelet compression is a form of data compression designed specifically for image compression (sometimes also video compression).

Principle

First, a 2D wavelet transform is performed. This gives as many coefficients as the image pixel contains. These coefficients are easier to compress, since most of the important information concentrated in a few coefficients. This principle is also called transform coding. Subsequently, the coefficients are quantized and entropy coded and / or run-length encoding the quantized values ​​.

Examples of wavelet compression

Video Compression

  • Dirac
  • Snow
  • Tarkin

Image compression

  • PGF
  • JPEG 2000
  • MrSID
  • SPIHT
  • Data compression
  • Wavelet
Dirac (video compression format) Ogg#Ogg codecs Progressive Graphics File
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