Encyclopedia of Multimedia

2008 Edition
| Editors: Borko Furht

Discrete Wavelet Transform (DWT)

Reference work entry
DOI: https://doi.org/10.1007/978-0-387-78414-4_305
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Definition

Discrete Wavelet Transform is a technique to transform image pixels into wavelets, which are then used for wavelet-based compression and coding.

The DWT is defined as [ 1]:
$$W_\varphi (j_0 ,k) = {1\over\sqrt M }\sum\limits_{x} {f(x)\varphi _{j_0 ,k} } (x)$$
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References

  1. 1.
    R. Gonzalez and R. Woods, “Digital Image Processing,” Prentice Hall, Englewood Cliffs, NJ, 2002.Google Scholar

Copyright information

© Springer-Verlag 2008