Technical specifications

Overview

• Features
• System elements
• Hardware requirements
• Optional accessories
• Data exchange
• Operating systems
• Program components
  • Base module
  • 3D sensor module
  • Turntable module
  • Texture module

Features

• Fast scanner control
• Uncomplicated calibration
• Interactive view planning
• Easy handling of large datasets consisting of many range images
• Segmentation of the range images
• Registration of range images into a common world coordinate system
• Filtering functions
• Utilization of data redundancy for improved precision
• Polygonization
• 3D visualization
• Editing functions for the mesh
• Texturing (optional)

System elements

• 3D sensor head (standard) with 1024 x 768 pixel resolution, 2.4 second minimum shot speed
• Power supply for sensor head
• Connection cable for sensor head (4.5m)
• Rollable tripod, height adjustable, sensor head with adjustable pitch, yaw, and roll; easily transportable
• Calibration accessories for small, medium, and large measurement areas
• PCI card for the PC
• QTSculptor (software), base module and 3D sensor module

Hardwareanforderungen

Ordinary PC (not delivered with the system)

• At least 512 MB RAM, for very large objects 1 GB RAM is recommended
• 3D Graphics accelerator
• A free PCI card slot
• A free serial port (two with turntable module)

Optional accessories

• Additional license for the QTSculptor base module
• Network license for QTSculptor
• Turntable and QTSculptor turntable module
• QTSculptor texturing module
• Projector lens and calibration accessories for scanning small objects
• Camera for extra high resolution (1280 x 960, 4.8 second minimum shot speed)
• Camera for fast shots (780 x 580, 1.2 second minimum shot speed)
• Camera for extra fast shots (640 x 480, 0.6 second minimum shot speed)

Data Exchange

• Import: Ordered point clouds (range images)
• Export: A 3D mesh in STL (binary or ASCII), DXF, VRML, OFF, or IV format

Operating Systems

• Windows 98, NT, 2000, XP
• Linux, Solaris (Sun Workstation)

Program components

The QTSculptor program consists of a base module and optional program components for the control of the 3D sensor and the texturing of the 3D model.
All components are integrated in a user interface for ease of operation, but can also be used separately.

• Base module
  The base module forms the framework of the system. It contains all functionality with which the acquired 3D views are processed and brought together to form the complete object geometry.
  The essential functions are:
  • Import/Export functions
  • Interactive view planning
  • Easy handling of large datasets consisting of many range images
  • Segmentation of the range images
  • Registration/Orientation of range images into a common world coordinate system
  • Filtering functions
  • Utilization of data redundancy for improved precision
  • Polygonization
  • 3D visualization
  • Editing functions for the mesh
  
  
• 3D sensor module
  The fully integrated sensor module in QTSculptor allows for the control and calibration of the 3D sensor.
  By means of the initial calibration function, the system can be configured for a new measurement extent.
  Afterwards, a post calibration function can optimize a dataset by automatically optimizing the calibration parameters.
  • Control of the 3D sensor and acquisition of range images
  • Carrying out the initial calibration of the system
  • Post calibration of the system
  
  
• Turntable module
  The turntable module allows for the control of a turntable that was specially manufactured for QTSculptor. After the object has been placed onto the table's motor-driven turning knob, QTSculptor is able to automatically make several scans of the object from different, adjustable perspectives without having to move the object or the 3D sensor manually. Furthermore all scans of one sequence will be automatically registered with each other.
  Hence the turntable module can accelerate the scan process considerably if you are dealing with small or medium-sized objects.
  • Various turntable models for different object weights
  • Configuration of rotation angle and number of scans
  • Adjustable acceleration of the turning knob/li>
  
  
• Texturing module
  The texturing module allows for the production of 3D photo-realistic models and for their export as VRML models.The texturing is carried out using additionally acquired photographs of the object.
  The object is photographed with a digital camera from arbitrary viewpoints under constant lighting conditions.The resulting pictures are read into QTSculptor and with a few mouse clicks the system calculates the position of the camera with respect to the object.
  An automatic optimization algorithm makes sure that the photographs fit the geometry and to each other in overlapping areas. The photographs are combined and a textured 3D model is produced.
  • Processing of texturing photographs
  • Registration of the photographs in the object coordinate system
  • Calculation of the textured 3D model