Table 6.
Mean of the CPU times (in milliseconds) and mean of the iteration numbers obtained for the PSO, DE, CS, FA, BA, and IBA based on Otsu's entropy criterion for six test images over 50 runs.
| Alg. | K | Barbara | Living room | Boats | Goldhill | Lake | Aerial | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean time (ms) | Mean iteration | Mean time (ms) | Mean iteration | Mean time (ms) | Mean iteration | Mean time (ms) | Mean iteration | Mean time (ms) | Mean iteration | Mean time (ms) | Mean iteration | ||
| PSO | 2 | 0.84 | 9.4 | 0.90 | 9.6 | 0.94 | 8.8 | 0.94 | 8.98 | 0.91 | 10.12 | 0.81 | 9.04 |
| 3 | 1.22 | 13.26 | 1.24 | 14.68 | 1.28 | 14.1 | 2.86 | 14.3 | 1.17 | 13.48 | 1.29 | 15.16 | |
| 4 | 4.84 | 138.52 | 1.60 | 19.18 | 3.12 | 56.56 | 5.16 | 136.32 | 6.55 | 175.58 | 5.18 | 138.44 | |
| 5 | 10.02 | 261.06 | 8.14 | 221.64 | 32.96 | 1012.3 | 7.52 | 222.92 | 7.01 | 179.38 | 20.21 | 622.38 | |
|
| |||||||||||||
| DE | 2 | 0.73 | 14.06 | 1.0 | 15.66 | 1.0 | 16.59 | 0.81 | 15.14 | 0.76 | 17.72 | 0.85 | 15.9 |
| 3 | 3.01 | 66.3 | 2.25 | 30.3 | 2.81 | 70.01 | 1.51 | 27.88 | 1.90 | 29.19 | 3.20 | 70.1 | |
| 4 | 8.0 | 199.22 | 11.12 | 282.01 | 4.72 | 120.58 | 7.60 | 199.5 | 7.42 | 200.23 | 7.01 | 162.5 | |
| 5 | 26.6 | 796.88 | 24.3 | 683.11 | 31.90 | 950.33 | 23.9 | 686.32 | 21.65 | 604.76 | 18.52 | 523.22 | |
|
| |||||||||||||
| CS | 2 | 35.80 | 179.0 | 30.03 | 223.34 | 32.74 | 204.04 | 27.88 | 195.30 | 38.04 | 267.66 | 32.45 | 254.10 |
| 3 | 51.66 | 370.88 | 56.67 | 371.50 | 53.74 | 378.40 | 59.98 | 424.62 | 49.68 | 381.36 | 52.78 | 395.44 | |
| 4 | 100.78 | 723.22 | 83.43 | 578.94 | 76.98 | 595.66 | 70.92 | 531.74 | 85.30 | 646.44 | 83.84 | 593.52 | |
| 5 | 114.63 | 802.80 | 122.78 | 836.32 | 102.84 | 677.04 | 159.69 | 1115.44 | 109.90 | 746.36 | 209.36 | 1487.06 | |
|
| |||||||||||||
| FA | 2 | 8.16 | 12.02 | 8.72 | 12.54 | 7.17 | 10.64 | 8.61 | 12.68 | 7.28 | 11.66 | 7.94 | 12.18 |
| 3 | 15.73 | 28.62 | 12.67 | 28.54 | 16.10 | 28.7 | 15.61 | 27.78 | 13.38 | 30.04 | 15.56 | 27.7 | |
| 4 | 17.84 | 37.7 | 19.16 | 38.78 | 18.43 | 38.2 | 17.12 | 37.66 | 18.49 | 38.86 | 18.05 | 38.58 | |
| 5 | 21.27 | 43.9 | 20.15 | 43.78 | 43.51 | 669.52 | 20.93 | 44.54 | 21.27 | 43.12 | 20.58 | 44.68 | |
|
| |||||||||||||
| BA | 2 | 0.4 | 1.86 | 0.4 | 1.66 | 0.42 | 1.58 | 0.42 | 1.75 | 0.38 | 1.7 | 0.38 | 1.64 |
| 3 | 0.98 | 6.08 | 1.48 | 6.82 | 1.24 | 8.54 | 0.8 | 5.58 | 0.82 | 6.14 | 1.08 | 6.94 | |
| 4 | 3.68 | 30.16 | 3.56 | 28.72 | 4 | 33.56 | 3.72 | 30.36 | 4.48 | 31.32 | 5.1 | 42.14 | |
| 5 | 21.16 | 30.16 | 14.32 | 134.7 | 73.44 | 963.32 | 16.88 | 170.42 | 16.54 | 156.36 | 55.12 | 654.72 | |
|
| |||||||||||||
| IBA | 2 | 1.34 | 9.02 | 1.31 | 8.5 | 1.68 | 9.18 | 1.26 | 8.88 | 1.36 | 8.98 | 1.34 | 8.86 |
| 3 | 2.38 | 16.36 | 2.32 | 16.44 | 2.24 | 16.34 | 2.44 | 16.6 | 2.36 | 16.54 | 2.36 | 16.38 | |
| 4 | 3.74 | 26.60 | 3.6 | 26.48 | 3.66 | 26.56 | 3.7 | 26.3 | 3.58 | 26.56 | 3.46 | 25.84 | |
| 5 | 6.88 | 38.62 | 5.3 | 39.2 | 7.16 | 52.48 | 6.38 | 40.14 | 5.36 | 37.48 | 5.66 | 41.08 | |