APPLICATION OF FISHEYE LENS AND TERRESTRIAL LASER SCANNING IN ARCHITECTONIC DOCUMENTATION OF HARD-TO-REACH CULTURAL HERITAGE OBJECTS

In hard-to-reach places, (for example narrow streets or big buildings, located close to each other) creation of orthoimage and vectorial sketch using camera with classical lens is very difficult or sometimes impossible. In such situations we can combine photos from digital camera with three-dimensional model derived from Terrestrial Laser Scanning (TLS). Architectonic documentation is created on the basis of three-dimensional models and orthoimages. It is important product for architects or conservators in reconstruction of sculptures, monuments or inner and outer building facades. Both terrestrial laser scanner and fisheye lens have a very wide field of view. For this reason, thanks to combining those two techniques we can texture very precise models of vaults or facades, and we can detect and assess the size of damages or fractures in hard-to-reach places. In experiment, we assessed the use of 3D models derived from laser scanning, and images from digital camera with fisheye lens in making inventory and assessing the condition of vaulting, walls, sculptures etc. All researches were made in the church and one of old buildings in the Old Town in Warsaw. We have examined shape and structure of walls, sculptures, paintings and polychromes. In publication we will present rules and results of registration process and integration of the TLS data with the images acquired with the digital camera Kodak DCS 14n Pro with the fisheye lens (f = 10.5 mm).