Image-Based 3D Scanning: A Study on Surface Topography and Geometric Accuracy

Abstract

Image-based three dimensional (3D) scanning is a photogrammetry method.Photogrammetry is a scientific discipline used for obtaining dimensionalinformation from photographs taken of objects. This discipline used in themapping of geographical areas with photographs taken from airplanes at first,began to be used in obtaining the 3D model of objects with the development ofthe technology. Image-based 3D scanning method which is becoming increasinglywidespread in the field of photogrammetry has become important like laser andoptical scanning methods in areas of reverse engineering, personalized design,forensics, biomedical, industrial design, virtual reality. This method has someadvantages such as low cost, color modeling compared to other 3D scanningmethods, and yet is questioned in some aspects such as dimensional accuracy andsurface integrity. In this study, as a result of the scanning operations on smallsize (125-1000 cm3) objects, the digitized models and the actual objects werecompared dimensionally. In addition, glossy, transparent and matte surfaceobjects were modeled by image-based 3D scanning method and the differencesrelated to the process were revealed and the precautions to be taken werestated. This article is thought to be useful for researchers who want to useimage-based 3D scanning in their study.