UAV Block Geometry Design and Camera Calibration: A Simulation Study.

Acknowledged guidelines and standards such as those formerly governing project planning in analogue aerial photogrammetry are still missing in UAV photogrammetry. The reasons are many, from a great variety of projects goals to the number of parameters involved: camera features, flight plan design, block control and georeferencing options, Structure from Motion settings, etc. Above all, perhaps, stands camera calibration with the alternative between pre- and on-the-job approaches.

Photogrammetric method to measure the discrepancy between clinical and software-designed positions of implants.

Statement Of Problem: The position of dental implants placed with software-guided systems should be highly accurate in order to ensure safety and a passive fit of the immediate prosthesis.

Purpose: The purpose of this study was to measure the discrepancy between the clinical and software-planned position of dental implants by applying a photogrammetric method.

Material And Methods: Two casts were obtained, 1 from the surgical template and 1 from the actual position of the implants on the alveolar ridge of a patient.

Network design and quality checks in automatic orientation of close-range photogrammetric blocks.

Due to the recent improvements of automatic measurement procedures in photogrammetry, multi-view 3D reconstruction technologies are becoming a favourite survey tool. Rapidly widening structure-from-motion (SfM) software packages offer significantly easier image processing workflows than traditional photogrammetry packages. However, while most orientation and surface reconstruction strategies will almost always succeed in any given task, estimating the quality of the result is, to some extent, still an open issue.