Fast implementation of orthogonal greedy algorithm for tight wavelet frames
نویسنده
چکیده
We introduce and study a fast implementation of Orthogonal Greedy Algorithm for wavelet frames. The results of numerical simulation for N -term approximations of standard images by tight wavelet frames showed that to provide the same PSNR the popular 9/7 biorthogonal wavelet bases require 30%–40% more terms of the expansion. This is equivalent to 2–4 dB advantage of the wavelet frames in PSNR over the 9/7 bases for a fixed number of decomposition terms.
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ورودعنوان ژورنال:
- Signal Processing
دوره 86 شماره
صفحات -
تاریخ انتشار 2006