3d scanner is a scientific instrument, which is used to detect and analyze the shape (geometric structure) and appearance data (such as color, surface albedo and other attributes) of objects or environments in the real world. The collected data are usually used for 3D reconstruction calculation, and digital models of real objects are created in the virtual world. These models are widely used, such as industrial design, defect detection, reverse engineering, robot guidance, geomorphology measurement, medical information, biological information, criminal identification, digital cultural relics collection, film production, game creation materials and so on. The production of 3d scanners does not depend on a single technology. Different reconstruction technologies have their own advantages and disadvantages, and their costs and prices are also different. At present, there is no general reconstruction technology, and instruments and methods are often limited by the surface characteristics of objects. For example, optical technology is not easy to deal with glossy (high albedo), mirror or translucent surfaces, while laser technology is not suitable for fragile or perishable surfaces.
Classification and function editing of 3d scanner
Generally divided into contact 3d scanners and non-contact 3d scanners. Among them, non-contact 3d scanner can be divided into grating 3d scanner (also known as photographic three-dimensional plotter) and laser scanner. Three-dimensional scanning of grating includes white light scanning or blue light scanning. And laser scanners are a little different from lasers, line lasers and surface lasers.
3d scanner function:
1:The purpose of the 3D scanner is to create a point cloud on the geometric surface of an object, which can be used to interpolate the surface shape of the object. The denser the point clouds, the more accurate the model can be created (this process is called 3D reconstruction). If the scanner can get the surface color, it can further paste a texture map on the reconstructed surface, which is called texture mapping.
2.3d scanners can be simulated as cameras, and their line of sight is conical, so the information collection is limited to a certain range. The difference between the two is that the camera captures color information, while the 3d scanner measures distance.
Photography 3d scanner
The principle of photography 3d scanner scanning is similar to taking pictures with a camera. It is a product developed to meet the application needs of industrial design industry. It combines the advantages of high-speed scanning and high precision, and can freely adjust the measurement range as needed. From small parts scanning to overall body measurement, it can be perfectly competent and cost-effective. At present, it has been widely used in industrial design industry, and truly realizes "one machine in hand, worry-free design" for customers! Photographic structured light 3d scanner is a high-speed and high-precision three-dimensional scanning measuring device, which adopts the most advanced international principle of structured light non-contact photogrammetry. The basic principle of structured light 3d scanner is a compound three-dimensional non-contact measurement technology which combines structured light technology, phase measurement technology and computer vision technology. Using this measurement principle, objects can be photographed. The so-called photogrammetry is similar to the camera taking pictures of objects in the field of vision, except that the camera takes two-dimensional images of objects, while the developed measuring instrument obtains three-dimensional information of objects. Unlike the traditional 3d scanner, this scanner can measure a surface at the same time. During measurement, the grating projection device projects several beams of specially coded structured light onto the object to be measured, and two cameras with a certain included angle synchronously collect the corresponding images, then decode and calculate the phase of the images, and use the matching technology and triangulation principle to calculate the three-dimensional coordinates of pixels in the common field of view of the two cameras. The photographic 3d scanner can be moved to the position of the workpiece at will for on-site measurement, and can be adjusted to any angle for all-round measurement. Large workpieces can be measured in blocks, and the measured data can be automatically assembled in real time, which is very suitable for measuring objects of various sizes and shapes (such as automobiles, motorcycle shells and interiors, household appliances, sculptures, etc.). ).
The structure principle of photographic optical 3d scanner is mainly composed of grating projection equipment and two industrial CCD cameras. When the grating is projected on the measured object, the thickness changes and shifts. With the help of CCD camera, the actual three-dimensional appearance of the measured object can be known through computer operation.
Photographic 3d scanner adopts non-contact white light technology to avoid contact with the surface of objects, and can measure models of various materials. In the process of measurement, the measured object can flip and move at will, and the object can be measured from multiple angles. The system is fully automatic splicing, which can easily achieve 360 high-precision measurement of objects. Moreover, texture information can be obtained quickly while obtaining surface three-dimensional data, and realistic object shapes can be obtained, which can be quickly applied to scanning in manufacturing industry.
That's all. Now you finally know something about 3d scanning. 3d scanning has a wide range of applications, and its functions are not as powerful as you think. Some people say that in the near future, all building decoration workers will be fired. Because of the appearance of 3d scanning, all houses will be directly scanned in 3d, saving manpower and material resources. It is good that there is only one person operating the machine on the construction site. Can you believe it? I think this miracle will still happen.