## 1 Introduction  
Three-dimensional scanning has various applications in reverse engineering (RE), medicine, cultural artifacts, rapid prototyping, quality inspection, industry 4.0, industrial design, textiles, dentistry, prosthetics, and implants. Product development cycles take a considerable amount of cost and time, and 3D scanning can help product developers reduce the costs and lead time involved in terms of meeting the market demand, customer needs, requirements to change the design, redesigning, reengineering, etc. Therefore, the increased digitization of the product leads to greater possibilities of bringing about real change in the product design without wasting time and money. The images captured from a 3D scanner are analyzed using high-performance computers (HPC) with the help of compatible software. The software utilized for image analysis is either built-in for the 3D scanner or others, which include SolidWorks, Geomagic Design X, and the Geomagic plugin for SolidWorks, etc. [1]. Digitizing the manufacturing sector is a topic of extensive debate these days, resulting in huge time savings, significant economic throughput, precision and accuracy, and an enhanced automation level. Three-dimensional scanning plays an important role in the digitization of the manufacturing world. It has also strong applications in the reverse engineering (RE), which is helpful in those situations where a physical model of the engineering component is available without its virtual counterpart. [2; 3]. The purpose of 3D scanning is to transfer the real, physical object from a real-world environment into a digital object in a virtual environment. A 3D scanner gathers critical object information and a crucial level of detail regarding size and shape for further processing, such as 3D/4D printing, with the fact that additive manufacturing is a potential candidate for Industry 4.0 [4]. [PERSON] and [PERSON] [5] applied a reverse engineering approach using a non-contact laser 3D scanner on geometric modelling to improve spiral level gears. Although the authors put effort into reverse engineering crucial milling gears, they accepted that the error controls did not remain tight during their work despite their due considerations toward errors. As far as 3D scanning methodologies are concerned; contact, non-contact, and hybrid methods are three well-known methods of 3D scanning. When compared to the stylus/probe used to make contact with the surfaces in the contact methods, the non-contact method does not use any contacting tool such as stylus or probe to capture the dimensions of mechanical components. In fact, non-contact methods utilize various media including light, lasers, sound, magnetic fields, and X-rays to digitize the mechanical components with greater time savings. A 3D scanner using sensors, blue light, light-emitting diodes (LEDs), and cameras is a non-contact type of 3D scanner. The hybrid method of 3D scanning involves using both contact and non-contact methods together. Hybrid methods are used for scenarios in which the disadvantages of contact and non-contact methods must be fixed. For instance, non-contact methods consume lot of time to achieve a complete scan; on the other hand, inaccuracies are always encountered when using contact methods [2]. Three-dimensional scanning plays a vital role in engineering and in the medical sectors. In medical use, 3D scanning helps practitioners find the causes of various illnesses. Medical 3D scanning technologies include X-rays, computed topology (CT), ultrasounds, and magnetic resonance imaging (MRI). CT scans, X-rays, and MRIs fall into the category of non-contact methods of 3D scanning, whereas the ultrasound is a contact method of 3D Scanning. Three-dimensional scanning for medical applications involves producing medical implants that are nearly like the originals with specific standards. Three-dimensional scanning is very helpful to practitioners for accurately measuring the shape of a patient's bodily components with the aim of acquiring them physically.