Table 6. Variability of bitrate improvements of Photo, No-photo (a) and No-photo (b) images for SS-DWT variants presented in Figs 3 and 5.
| Transform variant | Images | ||
|---|---|---|---|
| Photo | No-photo (a) | No-photo (b) | |
| ΔrRH(1) | -0.97%(1.06%) | -32.26%(17.39%) | -7.56%(8.10%) |
| ΔrFIX1 | 0.15%(1.40%) | -22.07%(13.71%) | -5.51%(7.14%) |
| ΔrH0 RH(1) | -0.79%(0.87%) | -27.59%(16.51%) | -7.13%(8.12%) |
| ΔrH0 FIX1, FIX2, DWT | -0.47%(0.80%) | -29.04%(15.51%) | -6.81%(8.12%) |
Δrvariant_list, ΔrH0 variant_list−average bitrate change reported with standard deviation (in parenthesis) obtained for the best out of the listed actual bitrate-based and entropy estimation-based variants.