Information Lack Localization in Architectural Laser Scanning Surveys: the Venice Test Site

The laser scanning survey is one of the most updated and growing technique to acquire digital data for the architectural archives, including the cultural heritage applications and the archeological sites documentation. In the last years, many approaches have been proposed integrating digital photogrammetry and image processing algorithms. The laser scanner, sometimes, has been used only to produce something like “beautiful and good photos”, where the most prominent aspect is the big amount of digital data acquired at a big rate of spatial resolution. In this paper, the authors propose an approach based on the interpretation and the data mining applied to the laser scanning surveys performed at some historical buildings in Venice. This approach integrates the digital image filtering and the study about the lack of information among different digital data format.