TLS data for cracks detection in building walls

The research programme included two stages, the laboratory and the field, so the datasets are divided into two groups of data. During both measurement stages, a phase-shift (PS) scanner Z + F 5016 IMAGER (manufactured in 2019) was used. In the laboratory stage, a specimen of white silicate with ten grooves with widths from 1 mm to 10 mm was scanned. The specimen was tested from four distances, and at five angles of incidence for each of these distances, as follows: - 5 m (0 gon, 20 gon, 40 gon, 60 gon, and 80 gon) - 10 m (0 gon, 20 gon, 40 gon, 60 gon, and 80 gon) - 15 m (0 gon, 20 gon, 40 gon, 60 gon, and 80 gon) - 20 m (0 gon, 20 gon, 40 gon, 60 gon, and 80 gon) Such a measurement scheme provided twenty different ‘geometric’ measurement conditions. For the field tests, three real buildings with poor technical conditions (with cracks of different widths and depths) were used. In this stage, four of the above-mentioned measurement conditions were verified. For the post-processing of datasets and mapping of results, the open-source CloudCompare software was used. The structure of the name of the files is as follows: XXgonYYm.bin - where XX stands for the angle of incidence [gon], and YY stands for the distance in meters from TLS to target [m].