Jump to content

Wavelet compression

Add links
From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Rade Kutil (talk | contribs) at 15:49, 30 April 2002. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)

Wavelet compression is a form of data compression especially for image compression (sometimes also video compression). The goal is to write image data as compressed as possible into a file. A certain loss of quality is accepted (lossy compression).

Method: First a wavelet transform is applied. This produces as many coefficients as there are pixels in the image. These coefficients can be compressed more easily because the information is statistically concentrated in just a few coefficients. This priciple is called transform coding. After that, the coefficients are quantized and the quantized values are entropy encoded and/or run length encoded.

Examples for wavelet compression:

Retrieved from "https://en.wikipedia.org/w/index.php?title=Wavelet_compression&oldid=336137"