Fluorescence imaging of historical buildings by lidar remote sensing

This paper reports on the first lidar imaging experiments carried out on a historical monument. The measurements were carried out by scanning the northern facade of the Lund cathedral from a distance of at least 60 m with a mobile fluorescence lidar. Two different arrangements were used for the receiver: an optical multi-spectral analyser or two photomultipliers equipped with interference filters. Depending on the wavelength the fluorescence images allow the mapping of biodeteriogen colonisation or of the different stony materials. To our knowledge these were the first images of a historical building detected by a fluorescence lidar.