研究目的
To investigate 3D digital documentation techniques for buildings and to develop the detection and tracking method through using digital close-range photogrammetry technique or laser scanning technique applied to 3D models as an attempt of a hybrid digital reconstruction.
研究成果
The hybrid technique, combining photogrammetry and TLS, showed the best accuracy for 3D digital documentation of buildings, with enhancements in accuracy for point coordinates, lines, and angles. It is recommended for surveying over traditional methods.
研究不足
The photogrammetry technique is affected by brightness and camera resolution, which can produce a lack of points and unclear surfaces. TLS faces difficulties in scanning through rigid objects like trees, rocks, and metal obstacles, causing null gaps in point cloud reconstruction.
1：Experimental Design and Method Selection:
The study compares Close Range Photogrammetry (CRP), Terrestrial Laser Scanning (TLS), and a hybrid technique combining both for 3D digital documentation of a mosque.
2：Sample Selection and Data Sources:
The mosque of Kafrelsheikh University was selected for the study.
3：List of Experimental Equipment and Materials:
Total station SOKKIA CX105, Nikon D7200 camera, and TOPCON GLS-2000 terrestrial laser scanner were used.
4：Experimental Procedures and Operational Workflow:
The methodology involved surveying the mosque using the total station, CRP, TLS, and combining CRP and TLS point clouds for the hybrid technique.
5：Data Analysis Methods:
Data from the techniques were compared to total station observations as the baseline reference, with residuals calculated for points, lines, and angles.
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