![]() A well established classification divides them into two types: contact and non-contact. The techniques work with most or all sensor types including optical, acoustic, laser scanning, radar, thermal, and seismic. ![]() There are a variety of technologies for digitally acquiring the shape of a 3D object. This whole process, going from the single range map to the whole model, is usually known as the 3D scanning pipeline. ![]() These scans have to be brought into a common reference system, a process that is usually called alignment or registration, and then merged to create a complete 3D model. Multiple scans, from different directions are usually helpful to obtain information about all sides of the subject. In some situations, a single scan will not produce a complete model of the subject. This allows the three dimensional position of each point in the picture to be identified. The "picture" produced by a 3D scanner describes the distance to a surface at each point in the picture. While a camera collects colour information about surfaces within its field of view, a 3D scanner collects distance information about surfaces within its field of view. Like most cameras, they have a cone-like field of view, and like cameras, they can only collect information about surfaces that are not obscured. If colour information is collected at each point, then the colours or textures on the surface of the subject can also be determined.ģD scanners share several traits with cameras. These points can then be used to extrapolate the shape of the subject (a process called reconstruction). This 3D model consists of a polygon mesh or point cloud of geometric samples on the surface of the subject. The purpose of a 3D scanner is usually to create a 3D model. Other common applications of this technology include augmented reality, motion capture, gesture recognition, robotic mapping, industrial design, orthotics and prosthetics, reverse engineering and prototyping, quality control/inspection and the digitization of cultural artifacts. These devices are used extensively by the entertainment industry in the production of movies and video games, including virtual reality. For example, industrial computed tomography scanning, structured-light 3D scanners, LiDAR and Time Of Flight 3D Scanners can be used to construct digital 3D models, without destructive testing.Ĭollected 3D data is useful for a wide variety of applications. For example, optical technology may encounter many difficulties with dark, shiny, reflective or transparent objects. Many limitations in the kind of objects that can be digitised are still present. ![]() The collected data can then be used to construct digital 3D models.Ī 3D scanner can be based on many different technologies, each with its own limitations, advantages and costs. if you are skilled enough you can easily model anything of course with NURBS joining, but its a pain and takes time and not a smooth answer of course, this is just one weak point of NURBS in general…Įven though i am not a mathematician i still dont seem to understand why making n-NURBS is causing so much trouble… where are the masterminds who can align 2 sides of one NURBS onto another… instead everybody is running crazy with a replacement for something which does not seems to be the real answer anyway.Scanning of an object or environment to collect data on its shape Making a 3D-model of a Viking belt buckle using a hand held VIUscan 3D laser scannerģD scanning is the process of analyzing a real-world object or environment to collect three dimensional data of its shape and possibly its appearance (e.g. the problem is when trying to make a conjuntion out of 3 parts you always end up creating a 5 sided generally called n-NURBS which does not want to work in Rhino… not sure if there are real n-NURBS i cant find a software which does. I never used tsplines because i had this pleasure with C4D since i can think off 3d modelling… C4D initially called it Hyper NURBS and converged its name to SubDivision later… which is still just polygons which uses “tendency” but i read into it while also following the never ending quarrels but also seeing the necessity for it.įiddled around for hours and days trying to find a solution how to avoid this keeping NURBS on the surface. ![]()
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