1. Manuals
  2. Brands
  3. DAVID Manuals
  4. Scanner
  5. 4
  6. Manual

DAVID 4 Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
10/31/2016
Introduction
Installation
Setup
Connections
Camera Positioning
Camera Setup
Projector Setup
Calibration
Scanning
Turntable Control
Camera Control
Projector Control
Pattern Parameters
SL Scanning
Result Filtering
Result Transfer
Texturing
White Balancing
Shape Fusion
Project
List of Scans
Cleaning
Alignment
Fusion
A-B Distances
Comparison
http://www.david­3d.com/en/support/david4/print­version
DAVID ­ DAVID 4 Manual
1/38

Advertisement

Table of Contents
loading

Related Manuals for DAVID 4

Summary of Contents for DAVID 4

  • Page 1 10/31/2016 DAVID ­ DAVID 4 Manual Introduction Installation Setup Connections Camera Positioning Camera Setup Projector Setup Calibration Scanning Turntable Control Camera Control Projector Control Pattern Parameters SL Scanning Result Filtering Result Transfer Texturing White Balancing Shape Fusion Project List of Scans Cleaning Alignment Fusion...
  • Page 2 Shape Fusion 3D Viewer Welcome Welcome to the DAVID 3D Scanner 4 documentation. DAVID 4 is a complete solution for generating a watertight 3D surface model of a real world object. Videos Before further reading you should watch our tutorial videos first:...
  • Page 3 Shape Fusion 3D Viewer Before you connect any DAVID device to the PC, please install the DAVID software and drivers: 1. Connect the USB flash drive to your PC, then select "Browse" or Explorer / My Computer. 2. Start "DAVID_Setup_xxx.exe" (administrator rights required).

  • Page 4: Main Setting

    10/31/2016 DAVID ­ DAVID 4 Manual Setup ↑ Introduction Installation Setup Connections Camera Positioning Camera Setup Projector Setup Calibration Scanning Texturing Shape Fusion 3D Viewer After successfully connecting all devices, you typically walk through the following steps: 1. Main setting Select as "Setup Type".

  • Page 5: Working Distance

    5. Selection of camera Under "Camera Setup", select your camera (e.g. DAVID-CAM-3.1-M). The live image from the camera is displayed. If necessary, set the mechanical aperture and focus so that you get a picture. 6. Position of the camera http://www.david­3d.com/en/support/david4/print­version...

  • Page 6: Exposure Time

    10/31/2016 DAVID ­ DAVID 4 Manual Move the camera slide by loosening the thumbscrew so that the camera is aimed on projected pattern on the object. Then fix the camera slide. If the viewing range of the projector and / or camera contains much more than the surface to be scanned, you should reduce the working distance of the scanner (step 3).
  • Page 7 In this case please darken the room. The aperture dial (A) on the camera has a scale (f-stop from 16 to 1.4). Even for very bright conditions (small objects), please avoid setting f-stop higher than 16, otherwise you will lose sharpness. If necessary, better reduce the value in the software.
  • Page 8 (size of the scanning area, working distance, brightness of the object) and must be calibrated like this. ↑ Setup Connections Connect the camera, the projector and the DAVID USB flash drive according to the wiring diagram to your computer. To connect the projector to your computer, you can use HDMI (recommended) or VGA. http://www.david­3d.com/en/support/david4/print­version 8/38...
  • Page 9 10/31/2016 DAVID ­ DAVID 4 Manual Connection diagram If you want to change the video source (e.g. HDMI to VGA), follow these instructions: 1. Press key ( key) on projector. Source ↑ 2. Select desired video source using keys. ↑ ↓ 3. Press key to confirm selection.
  • Page 10 10/31/2016 DAVID ­ DAVID 4 Manual Setup Camera Positioning ↑ Position of the camera The camera can be mounted on the right or left side of the projector: Size of the scan object / scan area Position of the camera (seen from rear) up to 110 mm...

  • Page 11: Rotation Of The Camera

    10/31/2016 DAVID ­ DAVID 4 Manual Left: Small object → short distances; Right: Large object → greater distances Rotation of the camera Rotate the camera by about 22° such that it aims at the projection area. To do this, loosen the thumbscrew under the camera. Set the rotation angle by means of the degree scale on the camera slide, then fix the thumbscrew.
  • Page 12 10/31/2016 DAVID ­ DAVID 4 Manual Setting the camera angle For very large objects, or objects with deep cavities, a smaller camera angle may be necessary. Angles less than 20° result in reduced scan quality (noise, inaccuracies). A very large camera angle (> 30°), may improve the scan quality a little, but is only suitable for very flat objects.

  • Page 13: Setting Up The Projector As Extended Desktop In Windows

    10/31/2016 DAVID ­ DAVID 4 Manual Setup Projector Setup ↑ Setting up the projector as Extended Desktop in Windows Click the right mouse button on a blank area of your Windows desktop, select "Screen resolution" or "Properties" (depending on your Windows version). In this window you can separately configure your two "Displays", the monitor and the projector. (Image may vary) http://www.david­3d.com/en/support/david4/print­version...
  • Page 14 Any window can be moved between monitor and projector back and forth. So in case the main DAVID window is displayed on the projector, please grab its title bar with the mouse and drag it sideways onto the monitor.
  • Page 15 Shape Fusion 3D Viewer An advantage of the modular design of the DAVID 4 scanners is that it can be adjusted to scan a wide range of objects sizes. Therefore, a calibration (measurement of the scanner hardware in the software) is necessary so that the software can then obtain precise and undistorted 3D data at the correct scale.
  • Page 16 10/31/2016 DAVID ­ DAVID 4 Manual Setting up the glass calibration panels Set up the calibration corner. You will need both 90° fixing brackets and the glass calibration panels. Put one fixing bracket flat on the used surface (e.g. a table). Insert the glass calibration panels in the fixing bracket.
  • Page 17 10/31/2016 DAVID ­ DAVID 4 Manual Calibration pattern too small; Suitable calibration pattern; Calibration pattern too large Choose the calibration pattern whose size fits to the scanned object. The pattern should be slightly larger than the object / region to be scanned. For object sizes above ca. 200 mm, use the large 240-mm pattern on the back.
  • Page 18 You can achieve this by moving the scanner and tilting or adjusting the tripod, but you should not change anything above the red base rail. 4. Enter correct scale Typical setup for calibration Enter the correct scale length in the field.
  • Page 19 You can move, tilt and rotate the scanner as a whole, and you can close the DAVID software and restart it without losing the calibration. You can also change the value of to adjust the brightness (red sine curves) to the respective Projector Brightness...
  • Page 20 10/31/2016 DAVID ­ DAVID 4 Manual object to be scanned. However, if you rotate or move camera and projector separately or adjust the focus (for example for scanning significantly larger or smaller objects), the entire calibration process must be repeated. ↑ Scanning Introduction Installation...
  • Page 21 With each click on a new scan is generated. A sequence of patterns is successively projected and Start recorded. This can take between settings 2-4 seconds or longer. See also SL Scanning for scan options. Using the mouse, you can change the 3D view onto the object (see 3D Viewer for details).
  • Page 22 Scanning Turntable Control ↑ Check under "Turntable Control" to activate a DAVID turntable (Pro Edition) or your own Enable Turntable turntable via plugin interface (Enterprise Edition). The initialization may take a few seconds. You can set the that are automatically executed when you click on under Number of Scans...
  • Page 23 10/31/2016 DAVID ­ DAVID 4 Manual Deactivate all filters that might be active in your camera or camera driver (e.g. no smoothing and no extra sharpness). Prefer "raw" images. Be careful with "gain", since this introduces noise to the scans. For many cameras and situations the lowest (or 0 db) gain value works best.
  • Page 24 10/31/2016 DAVID ­ DAVID 4 Manual Scanning Pattern Parameters ↑ The amount and type of projected pattern influence the quality of a scan. On rule thumb is that with more scan time you get better scan results. The following presets are available: : Minimum scan time. Should only be used when speed is very important.

  • Page 25: Quality Check

    10/31/2016 DAVID ­ DAVID 4 Manual Auto Add to List Automatically adds the new scan (after result filtering was applied) to the List of Scans. Auto Align to Previous Automatically aligns the new scan to the previous one. If possible, the alignment mode currently set in 'Shape Fusion / Alignment' is used. This mode is only available, if is checked.
  • Page 26 10/31/2016 DAVID ­ DAVID 4 Manual background changes relative to the scanner. Please keep in mind that you get best results when you use a deep black background. Scanning Result Transfer ↑ Export each successful scan for example as an OBJ file ( ) and / or add it to the scan list (button Export ).
  • Page 27 White Balancing ↑ Whenever you change the texture settings, you should re-perform the white balancing. That means DAVID calibrates color transmission characteristics of the entire system (projector, camera), in order to be able to measure the colors of the object correctly.
  • Page 28 10/31/2016 DAVID ­ DAVID 4 Manual Shape Fusion ↑ Introduction Installation Setup Calibration Scanning Texturing Shape Fusion Project List of Scans Cleaning Alignment Fusion A-B Distances Comparison 3D Viewer The "Shape Fusion" menu provides functions to clean, align, fuse / merge several scans into a single 360°...
  • Page 29 Load Project and loads an existing one into DAVID4. Using projects should be the preferred method to save your data in DAVID 4. It is much faster and easier than using multiple OBJ files. ↑ Shape Fusion...
  • Page 30 10/31/2016 DAVID ­ DAVID 4 Manual Export 3D object file format from Wavefront Technologies. Some meta data is Import / lost in export. Export STereoLithography file format. Only geometry is imported and exported. Import / Export Polygon file format. Only geometry is exported. Export on selected scans shows up a context menu with various options.
  • Page 31 "Alignment" you can arrange all scans side by side, to Arrange 1D Arrange 2D get a good overview. DAVID offers several alignment modes. First, start with the alignment mode , which allows you to Free align arbitrarily positioned scans one-on-one. In order for the automatic mode to align two scans successfully, the two scans must have a unique region of overlap in common, which must not be too small.
  • Page 32 Combine selected scans use them as if they were a single scan. In our example we could combine scans 1 and 4 just before the alignment of the 5th. In this way, the 5th scan will be aligned simultaneously to both, which can lead to http://www.david­3d.com/en/support/david4/print­version...
  • Page 33 10/31/2016 DAVID ­ DAVID 4 Manual more overlap and thus better results. To un-group, click with the right mouse button on the entry in the list and select Uncombine scans Scans after alignment Shape Fusion Fusion ↑ Make all scans visible , which you want to fuse. Invisible scans will not be included in the fusion.
  • Page 34 10/31/2016 DAVID ­ DAVID 4 Manual With you can influence how tight the fused surface is fitted to the 3D scan points (default value Sharpness is 1). Greater values will make noise more visible. Negative values will smooth your fusion result. Feel free to try it, depending on the object.
  • Page 35 "Comparison" allows to measure signed distances between two surfaces: 1. Select a scan and set it as Test Object 2. Select a scan and set it as Reference Object 3. Enter the desired Tolerance [mm] 4. Click on Compare 5. Add data tips on the reference scan with Add Reference Marker http://www.david­3d.com/en/support/david4/print­version 35/38...
  • Page 36 10/31/2016 DAVID ­ DAVID 4 Manual 3D Viewer ↑ Introduction Installation Setup Calibration Scanning Texturing Shape Fusion 3D Viewer 3D Navigation You can move around your scans in 3D by mouse: Left Mouse Button Down + Mouse Move The virtual camera is translated orthogonal to the viewing direction. The amount of translation is proportional to the distance between the virtual camera and the "Orbit Center".

  • Page 37: Select Objects

    10/31/2016 DAVID ­ DAVID 4 Manual Right Mouse Button Click Point on object surface was clicked: This point will be set as the new "Orbit Center". Background was clicked: Nothing happens. Auto adjust camera view to all objects or selected objects. The "Orbit Center" is set to the center of the enclosing bounding box.
  • Page 38 10/31/2016 DAVID ­ DAVID 4 Manual Show triangle edges on/off. Toggle polygon mode between , or Solid Lines Points Show textures on/off. Show vertex normals on/off. These are the shortcuts for the 3D viewer only. There are other function specific shortcuts which are displayed in the tooltips.

Table of Contents