Table 7 Entropy for the distribution on resolutions of the isotropic compression-oriented distribution (g = 5, b = 1/ 4, c = 0) and the uniform distribution
From: Assessing JPEG2000 encryption with key-dependent wavelet packets
Res. at level | Quality | Entropy (iso) | Entropy (isouni) |
|---|---|---|---|
0 | 1 | 114.0 | 261.6 |
1 | 1/4 | 28.7 | 65.4 |
2 | 1/16 | 7.5 | 16.3 |
3 | 1/64 | 2.2 | 4.1 |
4 | 1/256 | 0.8 | 1.0 |
5 | 1/1024 | 0.0 | 0.0 |