Table 3 Speedup comparison by target bitrate
From: Enhancing LTW image encoder with perceptual coding and GPU-optimized 2D-DWT transform
Rates | PE_LTW mean times | SPIHT | Kakadu | Speedup comparison | ||
|---|---|---|---|---|---|---|
(bpp) | T.GPU | Total | Total | vs. SPIHT | vs. Kakadu | |
512×512 | 1 | 31.4 | 86.5 | 13.3 | 2.76 | 0.42 |
0.5 | 18.4 | 68.8 | 11.1 | 3.74 | 0.61 | |
0.25 | 12.2 | 58.6 | 8.0 | 4.80 | 0.66 | |
0.125 | 8.9 | 61.1 | 7.4 | 6.86 | 0.83 | |
2,048×2,560 | 1 | 540.2 | 934.9 | 179.0 | 1.73 | 0.33 |
0.5 | 335.1 | 1,750.6 | 129.0 | 5.22 | 0.38 | |
0.25 | 229.0 | 987.5 | 100.3 | 4.31 | 0.44 | |
0.125 | 166.6 | 731.7 | 89.0 | 4.39 | 0.53 | |