Overview

IIT Measuring Stereo Scanner (MSS) is the solution based on the close-range photogrammetric technique, which provides the precise automatic measurement of 3D co-ordinates or/and reconstruction of 3D shapes, based on a set of video images acquired with different aspect angles under the structured light.

Structure

• set of CCD video cameras (2 or more)
• PC equipped with frame grabbers
• set of test fields for system calibration and orientation
• structural light source (light projector)
• photogrammetric software for 3D measurement and 3D reconstruction
• 3D viewer software for visual inspection of 3D scanning results

Features

• Measurement output: triangulated set of 3D points or corresponded CAD-description
• Virtual output: complete 3D model with photorealistic color texture of the object surface

Key Data

• System and camera calibration: fully automatic by coded targets
• 2D measurement precision: up to 0.1 pixel
• 3D measurement precision: up to 0.1% of object's linear dimension
• Productivity: 10 000 points per minute
• Scanning density: 5-10 points/mm2

Advantages

• Low cost. Photogrammetric system is essentially cheaper in comparison with 3D laser scanners.
• High precision. Precision is comparable with 3D laser scanners.
• Easy operation. All operations including the calibration are implemented as "one button click" operations.
• Easy scaling. MSS can be implemented without principal modifications both for mm-sized object measurement and for 10m-sized object measurement.

Applications

• CAD Design and Rapid prototyping. Automatic 3D model generating of industrial objects for purposes of automatic design, rapid prototyping and reverse engineering.
• Technical control. Real-time automatic measurement of technical and technological parameters of industrial details.
• Medicine. Non-contact measurements for various purposes: automated denture production, orthopedic footwear production, plastic surgery.
• 3D modeling for Virtual reality. Scanning of real world objects in order to put their exact and photorealistic copies into the virtual space. Target: games, virtual museums, virtual tourism, web-communication and so on.