Table 4.
The average point density and nominal point interval of the structure from motion (SfM) models generated with the different shooting angles under the FSC mode.
| Specimen | Camera | Shooting Angle |
Size | Point Count | Average Point Density (points/mm2) |
Nominal Point Interval (mm) | |
|---|---|---|---|---|---|---|---|
| X (mm) |
Y (mm) |
||||||
| RJ1 | T329t | 30° | Not aligned | ||||
| 45° | 145.3 | 145.3 | 359,971 | 17 | 0.19 | ||
| 60° | 146.0 | 146.0 | 297,249 | 14 | 0.21 | ||
| 75° | 146.1 | 145.2 | 342,453 | 16 | 0.20 | ||
| iPhone 6s | 30° | 145.6 | 145.2 | 1,377,051 | 65 | 0.11 | |
| 45° | 145.8 | 145.8 | 1,276,795 | 60 | 0.11 | ||
| 60° | 145.9 | 145.5 | 1,269,231 | 60 | 0.11 | ||
| 75° | 146.5 | 144.4 | 980,992 | 46 | 0.13 | ||
| Pixel 2 | 30° | 146.4 | 147.0 | 1,075,093 | 50 | 0.12 | |
| 45° | 146.1 | 146.3 | 946,617 | 44 | 0.13 | ||
| 60° | 146.5 | 146.1 | 937,802 | 44 | 0.13 | ||
| 75° | 146.3 | 145.8 | 1,040,414 | 49 | 0.13 | ||
| Sony A6000 | 30° | Not aligned | |||||
| 45° | 145.9 | 145.9 | 1,680,130 | 79 | 0.10 | ||
| 60° | 146.9 | 146.9 | 1,513,866 | 70 | 0.11 | ||
| 75° | 146.9 | 146.2 | 1,048,596 | 49 | 0.13 | ||
| RJ2 | T329t | 30° | 148.3 | 147.9 | 504,820 | 23 | 0.17 |
| 45° | 146.0 | 144.0 | 376,180 | 18 | 0.19 | ||
| 60° | 146.9 | 144.8 | 329,427 | 15 | 0.20 | ||
| 75° | 145.7 | 146.9 | 349,153 | 16 | 0.20 | ||
| iPhone 6s | 30° | 145.1 | 143.3 | 1,327,271 | 64 | 0.11 | |
| 45° | 146.8 | 142.1 | 1,346,091 | 65 | 0.11 | ||
| 60° | 148.7 | 145.4 | 1,353,423 | 63 | 0.11 | ||
| 75° | 147.3 | 143.9 | 1,002,612 | 47 | 0.13 | ||
| Pixel 2 | 30° | 146.5 | 142.7 | 999,420 | 48 | 0.13 | |
| 45° | 146.8 | 142.4 | 1,028,325 | 49 | 0.12 | ||
| 60° | 146.3 | 143.3 | 946,858 | 45 | 0.13 | ||
| 75° | 146.5 | 144.3 | 1,041,779 | 49 | 0.12 | ||
| Sony A6000 | 30° | Not aligned | |||||
| 45° | 142.6 | 144.4 | 1,565,978 | 76 | 0.10 | ||
| 60° | 144.6 | 144.0 | 1,342,247 | 64 | 0.11 | ||
| 75° | 147.1 | 143.6 | 1,870,939 | 89 | 0.10 | ||