Abstract
Abstract. An orthoimage is one of the basic photogrammetric products used for architectural documentation of historical objects; recently, it has become a standard in such work. Considering the increasing popularity of photogrammetric techniques applied in the cultural heritage domain, this research examines the two most popular measuring technologies: terrestrial laser scanning, and automatic processing of digital photographs. The basic objective of the performed works presented in this paper was to optimize the quality of generated high-resolution orthoimages using integration of data acquired by a Z+F 5006 terrestrial laser scanner and a Canon EOS 5D Mark II digital camera. The subject was one of the walls of the “Blue Chamber” of the Museum of King Jan III’s Palace at Wilanów (Warsaw, Poland). The high-resolution images resulting from integration of the point clouds acquired by the different methods were analysed in detail with respect to geometric and radiometric correctness.
Highlights
Cultural heritage has become a domain of wide popularity for close-range photogrammetric techniques
The following measuring techniques have recently been those most commonly used for documentation of historical objects: terrestrial laser scanning (TLS), and photogrammetric techniques based on image matching
Generation of dense point clouds based on a group of photographs is possible using the Structure from Motion algorithm combined with the Multiview Stereo approach, which forms the foundation of modern photogrammetry
Summary
Cultural heritage has become a domain of wide popularity for close-range photogrammetric techniques. High-resolution elaboration of difficult-to-access objects which may be destroyed is not difficult if non-invasive photogrammetric measuring technologies are applied (Chiabrando, Spano, 2013). Conventional measuring technologies, such as tacheometry, are often substituted by photogrammetric data acquisition methods because they are time consuming and usually do not guarantee the expected level of detail (Vosselman, Mass, 2010; Grussenmeyer et al, 2008). The use of close-range photogrammetry for works related to cultural heritage still needs further research. Integration of two measuring technologies can result in the elimination of the weaknesses of one by the advantages of the other
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