BDPP > BDPP0053

abstract Figures 53, 54 and 55 show parts of the portico and the ceiling of the central nave. The partially visible arch on the right-hand side is the upper part of the main entrance gate; the column on the left-hand side is part of the innermost row of columns. While figure 53 shows the visible surfaces from the point cloud, figure 54 shows the same view with partially hidden surfaces. This enables the onlooker to inspect the structure of the truss that was built after the demolition of the antique remains in the first half of the seventeenth century. Figure 55 shows the same part of the point cloud with real colours taken from a digital photograph in the same area. The original photograph can be found in the online image repository at www.digitalpantheon.ch/BDPP0384/. It was stretched to compensate for the optical distortion of the camera optics and was subsequently mapped onto the point cloud coordinates in order to gain a model with a homogeneous colour space. The truly spatial character of this hybrid visualisation can be seen at the partially translucent column shaft. Originally, the technique of photo mapping was intended to be used for the whole model so as to counterbalance the changing lighting conditions during the two scanning campaigns. However, although the scanner is equipped with its own camera, the collected colour information proved to be of little use as it took so long to measure the building. The test carried out in this small area proved the impracticability of this approach because of the time needed. The numerous bright spots in figures 18, 22 and 24 are a result of this problem
address Bern
author Project, The Bern Digital Pantheon
editor Graßhoff, Gerd and Wäfler, Markus and Albers, Jon and Berndt, Christian
keywords Medium Visualisation Building Porticus
nstandard BDPP0053.png
repository Digital Repository of the Bern Digital Pantheon Project
timestamp 2009.05.28
title of the portico and ceiling, shaded point cloud in a multi-hued intensity map
year 2009
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