Table 2 Denoised results for polluted “barbara” by wavelet tight frame method and adaptive wavelet tight frame in terms of different filter sizes
From: Adaptive tight frame based multiplicative noise removal
Initial tight frame | Filter size | Non-adaptive algorithm | Adaptive algorithm |
|---|---|---|---|
Haar wavelet | 2 \(\times\) 2 | 29.44 | 29.55 |
\(4 \times 4\) | 30.18 | 31.39 | |
8 \(\times\) 8 | 30.46 | 32.72 | |
Local DCT | 2 \(\times\) 2 | 29.37 | 29.48 |
\(4 \times 4\) | 31.27 | 31.55 | |
8 \(\times\) 8 | 32.32 | 32.71 | |
Linear framelet | 3 \(\times\) 3 | 29.91 | 30.94 |
\(7 \times 7\) | 30.63 | 32.41 | |
\(15 \times 15\) | 31.05 | 32.67 |