The three-dimensional aquisition technology of the scanners of the Maestro line, belongs to the class of techniques of the structured light projection triangulation. The structured light projection is the evolution to whole field of the techniques based on laser. The structured light in fact acquires in parallel also millions of points when the lasers compose the point cloud through the acquisition of single points or profiles. The time of a misuration is very small, within few seconds based on scanner resolution. The structured light uses the projection of incoherent light stripes that the object of interest deforms according to the shape of its surface. The elaboration of images containing the deformation of the stripes allows to extract the information of the object shape. The result of the scan is a depth image also known as range image or range map, that contains the coordinates of points and eventually also their color.

Advantages

• Non contact aquisition - the measure is performed in a not invasive way, without phisical contact with the object to scan. Unlike the "point and click" tracing systems, the structured light technology does not enter in contact with the surface of the object avoiding many problems related to the aquisition of particularly delicate or deformable objects.

• Speed of aquisition - the structured light projection allows the aquisition of hundred thousand of points in a few seconds.

• Security - the structured light technology does not use any laser. The light used is that of a normal halogen lamp. There is no danger in to measure body human parts as for instance the faces.

• Resolution and details - the density of aquired information allows to measure in natural manner even the more delicate details of the surface, with a resolution of few cents of millimeter.

• Color - the color information is associated at the measured points.

The process of tridimensional scan

The term 3D scanning (3D photography, automatic 3D acquisition) means the creation of a digital three-dimensional model that faithfully represents the characteristics of shape and color of a 3D object. The 3D digital model is an accurate description of the surface of the object under examination. The process of creation of the 3D digital model constists of the aquisition of partial descriptions of the object from more points of view (rangemap) and in to merge the informations in an unique digital model alone consituited by a cloud of points or, more commonly, by a set of triangles. The object or the scanner are freely moved and the coherent reference system is recovered through advanced 3D elaboration techniques of automatic type or based on the shape of the object. It is important to remark that the digital 3D models created with the 3D scanning tecnology are not images or image sequences: the model describes in a faithful and misurable way the surface of the real represented object.

Original Object	Set of the rangemaps	Three-dimensional reproduction

Possibile use of the Maestro3D technology

Biomedical Systems

• Fingerprint recognition (access control, digital locks, safe data processing transactions, electronic identity cards, vote systems).

• Facial recognitions

  • Public administrations (staff's paper, reserved zones).

  • Societies (safe access for the employees, banks, museums, casinos).

  • Airports (safe access in risk areas, check of the identity of the passengers).

Medical Applications

• Relief of dental casts/stumps for the orthodontics and the implantology.

• Relief of postural defects, busts/bodyces, orthopedics, reconstruction of the breast.

• Surgical treatment monitoring.

Industrial applications

• State of fact (3D survey of the existing installations).

• Simulations (productive processes and/or destructive tests).

• Analisys of tolerance (comparisons with existing CAD models).

• Rapid prototyping (easy and fast reproduction of copies faithful of the original, scaled or with real dimensions starting from the 3D digital model).

Architecture - Civil Engineering

• 2D Drawings (extraction of plants, views, sections from 3D model).

• 3D Models (virtual reconstructions and drawing of interiors).

• Augmented and/or Virtual Reality.

Cultural heritage

• State of fact and maps of degradation (controlled monitoring, advancement state of the restauration, non conventional investigations).

• Database with purpose of documentation and didactic.

• Digital simulations of particular atmospherical conditions over the digital model.

• Production of replicas.

Juditial Ambit

• Measure the scene of the crime.

• Dimensional controls in 3D (virtual people can be introduced in the cloud of points of the scene, in this way formuled hypotesis can quickly find denial or confirmation referring to complete geometric evaluations).

• Relief of accidents.