| Title |
Positional Accuracy Analysis According to the Exterior Orientation Parameters of Low-Cost Drone |
| Authors |
김두표(Kim, Doo Pyo) ; 이재원(Lee, Jae One) |
| DOI |
https://doi.org/10.12652/Ksce.2022.42.2.0291 |
| Keywords |
드론; 위치결정; 외부표정요소; 정확도 Drone; Positioning; Exterior orientation parameters; Accuracy |
| Abstract |
Recently developed drones are inexpensive and very convenient to operate. As a result, the production and utilization of spatial information using drones are increasing. However, most drones acquire images with a low-cost global navigation satellite system
(GNSS) and an inertial measurement unit (IMU). Accordingly, the accuracy of the initial location and rotation angle elements of the image is low. In addition, because these drones are small and light, they can be greatly affected by wind, making it difficult to maintain a certain overlap, which degrades the positioning accuracy. Therefore, in this study, images are taken at different times in order to analyze the positioning accuracy according to changes in certain exterior orientation parameters. To do this, image processing was performed with Pix4D Mapper and the accuracy of the results was analyzed. In order to analyze the variation of the accuracy according to the exterior orientation parameters in detail, the exterior orientation parameters of the first processing result were used as meta-data for the second processing. Subsequently, the amount of change in the exterior orientation parameters was analyzed by in a strip-by-strip manner. As a result, it was proved that the changes of the Omega and Phi values among the rotation elements were related to a decrease
in the height accuracy, while changes in Kappa were linked to the horizontal accuracy. |