3D scanning is the process of analyzing a real world object or environment to collect data on its size and possibly its appearance (such as color).
The collected data can then be use to create digital 3D models.
A 3D scanner can be base on many different technologies, each of which has its limitations, advantages and costs.
The kind of things can be digitise, there are still many limitations in it.
For example, optical technology can face many difficulties with shiny, reflective or transparent objects.
For example, industrial compute tomography scanning and structure-light 3D scanners can be used to produce industrial 3D models without devastating testing.
Combined 3D data is useful for a wide variety of applications.
These tools are used by the entertainment industry to produce movies and video games at large, which includes virtual reality.
Other common applications of this technique include increased reality, speed capture, gesture recognition, industrial design, orthotics and prosthetics, reverse engineering and prototype, quality control / inspection and digitization of cultural artifacts.
The basic principle is to use a 3D scanner to collect data about a subject.
The subject may be:
- One object
- An environment (like a room)
- A person (3D body scanning)
Some 3D scanners can collect size and color data simultaneously. A 3D scan color surface is called texture.
After a little bit of preparation on computer software, 3D scans are compatible with computer-aided design (CAD) software and 3D printing. In a process called reverse engineering, a 3D scan can give a lot of information about the design of an object.
3D scanners are powerful tools for professionals in many industries, such as automotive, aeronautics, dental, ornaments, as well as video games, special effects, and animation films.
3D scanning technologies depend on different physiological principles and can be classifies into categories:
- Laser triangular 3D scanning technique, as paint on the image, projects a laser beam on a surface and measures the distortion of the laser beam.
- Structured light 3D scanning technique measures distortion of light pattern on a surface to scan the surface.
- Photogrammetry, also called 3D scan from photography, re-organizes a theme from 2D in 3D with computer vision and computational geometry algorithm.
- The contact-based 3D scanning technique depends on the sample of several points on a surface, which is measure by the deformation of an investigation.
- Laser pulse (also called time on flight) 3D scanning technology is based on the timing of the flight of a laser beam. The laser beam is project on one surface and collected on a sensor. During its emission and reception the laser travel time gives geometric information of the surface.
3D SCANNING ADVANTAGES:-
- Quickly capture all the physical measures of any physical object
- Save time in design work
- Ensure the parts fit together in the first try
- Capture engineering customisation contain in built-in parts
- Use modern manufacturing on those parts which were originally built before CAD
- Compare “as-design” model to “as-built” condition of manufacture parts.