TECHNICAL FACILITIES FOR ENSURING SECURITY
Innovative solutions that can be applied in contemporary forensic science, including the examination of the place of the incident or crime, are still being sought. One of them is the preservation of evidence by means of 3D scanners. In Europe, 3D scanners have got, among others, Police services of the following countries: Switzerland, Germany, France, Spain and Italy In the paper, the results of research on the preservation of the crime scene using 3D scanning techniques have been presented. The research used Creaform hand scanners, both laser and structural light, Smarttech3D portable 1.3MPix, a scanner on the measuring arm – FARO Laser ScanArm AND
TERRESTIAL scanners (Faro, Leica, Z + F). The accuracy and precision of scanners were carried out on a certified measurement pattern. The obtained accuracy results for the tested scanners are within the accuracy range given by the manufacturers in the technical specifications of the devices. To examine the scanners’ resolution, an object with a complicated shape and many small elements was used. It was examined how the tested scanners behave when attempting to scan surfaces generally considered as hard to scan surfaces. Attempts have also been made to use a 3D structural light scanner to scan snow tracks. The possibilities of combining scans from a portable scanner (Go! SCAN50, Smarttech) and a scanner on a measuring arm (Faro), with scans obtained from long-range were examined. It has been found that it is possible to supplement clouds of points acquired in 3D scanning technology with photos from digital cameras, detailed scans of selected traces and precise geographical locations.