2026 Volume 7 Issue 1 Pages 267-278
This study was conducted to minimize doming-induced errors in pavement measurements using three-dimensional point cloud data, with the aim of applying SfM/MVS-based photogrammetry to as-built measurement of civil infrastructure. Specifically, the camera tilt angle used for acquiring the SfM/MVS input data was varied, and its contribution to doming suppression was quantitatively evaluated. When the maximum doming magnitude was normalized by the surveyed length, the ratio ranged from 4.88% to 5.93% at a camera angle of 0°, excluding cases in which excessive deformation prevented reliable measurement. By increasing the camera angle to 75° or higher, this ratio was reduced to 0.02%–0.10%, indicating a substantial suppression of the doming effect. In addition, the influences of target length and the number of image feature points on doming were investigated. The results showed that the maximum doming magnitude decreased as the shooting distance became shorter, and that a larger number of feature points contributed to more effective doming suppression.
