From a comparison between curves (i) of figures 1a and and1b1b it is also evident that the immobilization procedure doesn’t significantly alter the UV fluorescence spectra according to ref. 21
In recent years,various optical 3D-sensors have become available and are nowadays used in many different fields of work, e.g., reverse engineering or quality management in industrial tasks, cultural heritage, medicine and also criminal investigations [1]. Several different sensor technologies can be used for 3D digitizing, like terrestrial laser scanners (TLS), triangulation-based range sensors or photogrammetric approaches, like stereo cameras or bundle adjustment of multiple images [1�C7]. All of these sensors have their own limitations regarding flexibility, measuring volume, spatial resolution and accuracy.

For most applications, it would be sufficient to capture wide areas with an adequate spatial resolution and selected items, like, e.g., statues [5] or evidence objects [8] with a lot more details. Such a demand requires the fusion of different sensors, because a single sensor type is commonly not able to fulfill both requirements. Using low-cost sensors exacerbates this demand. These sensors have more strict limitations regarding measuring volume and resolution.The advantages and potentials of the combined usage of multiple sensors were presented early on [9] and are used nowadays in a wide range of applications, e.g., the navigation of an unmanned aerial vehicle (UAV) [10], cultural heritage [2�C5] and criminal investigation [6�C8].

In the field of 3D digitizing, the most frequently used sensor combination consists of a TLS and a digital camera. This combination enables an efficient, flexible and reliable acquisition of large objects, with the advantage of a high spatial resolution and photorealistic representation, and it is mostly used in terms of the documentation of cultural heritage. Many different applications Dacomitinib are presented in the literature, where TLS and photogrammetric measurements are used to build a multi-resolution 3D model of well-known cultural sites, e.g., Villa Giovanelli [4] or Pozzoveggiani Church [5], and much more. All of these approaches use manual or semiautomatic algorithms to align point-clouds of different sensors, which are time-consuming and need trained operators.Similar approaches can also be found in the field of crime scene documentation. An accurate geometrical conservation of crime scenes is of high interest, because the risk of losing evidence by modification by forensic staff, spectators and witnesses is immense. Large scenes have to be acquired quickly and non-invasively, as well as for single evidence objects with high resolution, e.g., for the reconstruction of a ballistic trajectory.