## 3 Results
### Verification of the Performance of the Improved Prototype Design  
The proposed prototype device for 3D surface scanning of physical objects without using external references and changing the relative position of the technology and the object is a unique solution with its own software and hardware. Consequently, verifying the qualitative and quantitative characteristics of the device, particularly the quality of the acquired surface data, poses a significant challenge. To address this challenge, an experimental approach was proposed to verify the results of the digitization process against a 3D model obtained by 3D scanning with an accurate commercial 3D scanner. Specifically, the Creality CR-Scan Raptor, manufactured and sourced by Shenzhen Creality 3D Technology Co., Ltd., Shenzhen, China, was utilized for this purpose. The device is claimed to have a maximum accuracy of 0.02 mm when using seven blue parallel laser lines, a 3D resolution of 0.02 mm, a working distance range of 150 mm to 400 mm, and an aligning mode that uses markers as external reference elements [29]. In selecting physical objects for scanning, it was imperative to choose objects with flat surfaces, where it is clearly possible to distinguish certain planar surfaces at a certain distance from each other. Consequently, a wooden block positioned on a box of natural brown color was selected. The disparity in height between the top surface of the wooden cube and the box will be utilized to assess the deviation of the data digitized by the prototype device against the nominal 3D  
Figure 19: Images and graphical interface of the prototype device software. Figure 20: Images after adjustment of HSV values for laser beam pixel registration. scan obtained by a commercial 3D scanner with settings for the highest available accuracy and precision. Initially, the objects were digitized with a prototype device employing default settings appropriate for the scene at a distance of 500 mm from the objects. A total of 2014 scans were obtained during the digitization process, which were subsequently stored as point clouds. These point clouds were subsequently exported to the ZEISS Inspect 2025 software, as illustrated in Figure 21a. This software was selected due to its suitability for the intended application and its availability. Following the digitization process with the prototype device, the Creality CR-Scan Raptor was employed for the digitization of the objects. This was necessitated by the requirement of the Creality CR-Scan Raptor for the application of Markers reference elements, which were not utilized by the prototype device. Following the completion of the 3D scanning process, the planar mesh model in STL format was exported to the same project in ZEISS Inspect software, as depicted in Figure 21b. The subsequent phase involved aligning the acquired data to the closest possible distance. Given that the ZEISS Inspect software does not permit the alignment of point clouds with surfaces, it was necessary to polygonize the point cloud that had been digitized by the prototype device. During this process, it was essential to select values to obtain meshes of the desired quality. The values for these parameters were determined by the authors based on the findings from prior research [30]. The values selected were as follows: minimum distance of used points, 0.6 mm; maximum noise, 10 mm; maximum length of new edges, 6 mm. The polygonized mesh, as illustrated in Figure 22a, was aligned using the Local Best Fit tool, with the top surface of the wooden block being aligned to the shortest possible distance. To focus the analysis on specific areas of the overlapping mesh surfaces, it was necessary to crop the mesh from the digitization with the prototype device. The cropped mesh is depicted in Figure 22b. Figure 21: Results from digitizing process for comparing surface quality. (**a**) Point cloud derived from the digitizing process employing prototype equipment, (**b**) three-dimensional mesh model digitized with high precision utilizing Creality CR-Scan Raptor.