Integration of multi-photos and laser scanner data to form a complete 3d model

• Published in: Ain Shams Engineering Journal Vol. 14; no. 5; p. 101952
• Main Authors: M. Eissa, Aser, F. Shaker, Ibrahim, Abdel-Wahab, A.M., I. Awad, Alaa AL Din
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2023; Elsevier
• Subjects: 3D models; Direct Linear Transformation (DLT); Documentation of monuments; Laser scanner; MATLAB; Non-metric digital camera; Direct Linear Transformation (DLT); Laser scanner; Documentation of monuments; Non-metric digital camera; 3D models; MATLAB
• ISSN: 2090-4479
• DOI: 10.1016/j.asej.2022.101952

Nowadays, laser scanners are widely used to get three-dimensional modeling, but sometimes some obstacles on the site or choosing the wrong scan width and the shadow areas due to different planes lead to the appearance of some gaps in the objective to be scanned. Mobile phone images (Conventional terrestrial photogrammetry technique) can be used to compensate for these missing data after transforming the image coordinates to ground coordinates. So, the main objective is to develop a technique to transform image coordinates to ground ones through the Direct Linear Transformation model (DLT) depending on a computer algorithm using the least-squares adjustment method. Four field experiments were made on AL-ASHRAFI QAITBAY. The obtained results showed that the putative technique can be applied to form a full 3D model with precision (11–22 mm) and it is compatible with the precision of a laser scanner.