Architectural Photogrammetry by Non-Metric Cameras: CAD-Based 2D Drawing of Facades from Rectified Photos

摘要

Architectural photogrammetry enhances documentation of historical buildings. Image rectification can generate an Ortho-photo from flat surfaces of sophisticated shapes of historical facades. Consequently the rectified photo can be scaled and a digit vector can overlay it to prepare 2D architectural drawings. As part of digital documentation of Masoudiyeh Historical Palace in Tehran, we used a low cost photogrammetry system (PhotoModeler) to record the facades of Divankhaneh Building with ornaments such as parget or damages such as cracks. We implemented the tool's self-calibration function for verifying the parameters of a non-metric camera. We photographed the facades according to a sketched geometry. Consequently we prepared several rectified photos and completed the facade's CAD-based 2D drawings.