Research Article
A Low-Cost and Ultralight Unmanned Aerial Vehicle-Borne Multicamera Imaging System Based on Smartphones
Table 2
Specifications and flight parameters for the two OP systems.
| | Parameters | Our OP system | Commercial OP system | | Site 1 | Site 2 | Site 3 | Site 1 | Site 2 | Site 3 |
| | UAV | DJI Phantom 4 Pro | DJI M600 Pro | | Camera type | Smartphone CMOS camera of Nokia N 808 PureView | Digital camera of Sony ILCE-5100 | | Number of camera lenses | 5 | 5 | | Focal length (mm) | 8 for all | 24 for vertical, 35 for others | | Pixel size (μm) | 2.6 | 3.9 | | Image resolution 5× (MP) | 60 | 1,200 | | Weight of aircraft (includes battery) (kg) | 1.346 | 10.254 | | Weight of multicamera (kg) | 0.296 | 1.850 | | Flight duration (min) | 18 | 25 | | Total cost (¥) | 19,000 | 158,000 | | Flight altitude ground level (m) | 38 | 72 | 98 | 70 | 134 | 180 | | Image forward/side overlap (%) | 85/80 | 85/80 | | Total number of images | 6,320 | 68,000 | 6,700 | 3,750 | 55,000 | 3,900 | | Total effective flight time (min) | 91 | 1,410 | 101 | 45 | 660 | 47 | | GSD (cm) | 1.2 | 2.3 | 3.1 | 1.2 | 2.3 | 3.1 | | | | |
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