What is 3D laser scanning?

three -dimensional (3D) laser scanning is a technique used to capture accurate digital information about objects and terrain in the real world. The process uses a beam or a laser light line to detect the object's surface and then - either through triangulation or by measuring the time required to discourage laser light - calculate its distance from the laser to generate points in 3D space. These points are then connected to special software and create a virtual model of the real world. Unlike some other 3D scan methods, 3D laser scanning does not affect or touch the object in any way, which is valuable for scanning fragile or large objects, such as historical artifacts and location. Depending on the mechanism used to perform 3D laser scanning, it can be a real scanner of a small pocket device, a larger stationary unit with a compartment for objects, or can even be designed as a system that can be mounted on movementsVé vehicle, suc, drought as an aircraft.

For 3D laser scanning, two primary methods are used. The first is known as triangulation and includes the use of a laser that is mounted on a scanning device with one or more cameras located in fixed positions relative to the laser. When the object is scanned, the cameras detect the laser light on the surface of the object. Using the angle of cameras and laser in relation to each other and the distances between them can be calculated a triangle that determines the distance of the laser from the scanner, giving the location of a 3D point in the virtual space.

The second method used in 3D laser scan also transmits the laser light beam to the object surface, but instead of optical determination of the laser distance, the time required is measured to bounce back into the sensor. The less time, the Gemini in Space. This method can use high -performance lasers and can scan objects that are at timesdistances far away, unlike the limited extent of triangulation.

Both 3D laser scanning methods have applications in production where objects can be created that can be scanned to problems or manufacturing defects. The scanners can also be used in entertainment where physical models or human faces can be digitized precisely in order to be manipulated in 3D animations. One of the popular uses for 3D laser scanning is to record 3D information about works of art, archaeological artifacts and places, as well as the whole topography for analysis, comparison and historical protection.