Architectural photogrammetry by non-metric cameras: CAD-based 2D drawing of facades from rectified photos

Abstract

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 façade's CAD-based 2D drawings. © 2012 Springer-Verlag Berlin Heidelberg.