background image

38

Z

 If you activate 

”Auto. Grab Texture“

, a color texture will be recorded with each scan. If the texture 

is too bright or too dark, you can adjust its settings in the 

”Texturing“

 menu (see next sub-chapter). 

You can toggle the visibility of the texture in the 3D view using the appropriate button under ”Visibility“.

Z

 Using the mouse, you can rotate the 3D view (right mouse button), move (left mouse button) and 

zoom (mouse wheel).

Z

 With the 

”Live“ 

button under 

”View“

 you can return to live video feed.

Z

 To assure that multiple scans of the same object can be well combined later, they must overlap 

sufficiently. You usually will need about 6-8 scans all around the object, maybe plus some angular views 
of top and bottom. Textures can help later when aligning multiple scans.

Z

 With the smoothing filters under 

”Result Filtering“

 you can smooth the 3D scan result manually. 

However, we recommend not to do this (set filters to 0). If your scans are noisy or wavy, you should rather 
optimize the scanning conditions (brightness settings, room conditions). More smoothing options are 
available in the Shape Fusion menu later on.

Z

 The filter 

”Quality check“

 removes scan data that are likely to be inaccurate. This is possibly on 

the edge of the scan or at transitions between light and dark areas. You can change the filter value and 
see the effect immediately on the scan. The recommended value is 0.5.

Z

 Save each successful scan as an OBJ file (

”Save As...“

) and/or add it to the scan list (button 

”Add 

to List“)

). After each click on ”Add to List“, you can align the new scan immediately to the previous 

scans (Shape Fusion menu, see next chapter). Alternatively, you can first create further scans in the 
”Structured Light“ menu, collect them in the list, and align them all later.

Z

 If the settings are optimized, and you do a lot of scans in a row, you can accelerate the workflow 

with the 

”Auto. Add to List“

 and/or 

”Align to Previous Scan“

 options. This is recommended only 

for experienced users.

Figure 5.3: Display of the scan result in 3D

Summary of Contents for SLS-2

Page 1: ...QUICK GUIDE...

Page 2: ...etup and Calibration of the Scanner 4 1 Menu Hardware Configuration 4 2 Menu Calibration 5 3D Scanning 5 1 Menu Structured Light 5 2 Menu Texturing 6 Alignment and Fusion of Multiple Scans 6 1 Menu Sh...

Page 3: ...Do not operate the device in potentially explosive atmospheres Never look directly into the projector lens when the lamp is turned on The bright light may cause serious damage to eyes Do not face the...

Page 4: ...tions of the projector manufacturer These can be found separately on the accompanying ACER projector CD 1 3 Scope of Delivery Structured Light Scanner pre assembled consisting of LED video projector C...

Page 5: ...operation The distance between the camera and projector optics will be similar to the size of the object region to be scanned 2 2 Rotation of the Camera Rotate the camera by about 22 such that it aims...

Page 6: ...duce the depth of the measurement range 2 3 Connection Connect the camera the projector and the DAVID USB flash drive according to the wiring diagram to your computer Fig 2 3 To connect the projector...

Page 7: ...tor s menu at any time as follows See Figure 2 4 1 Select Reset 2 Turn the Auto Keystone off and set the manual value Manual Keystone to 0 3 As Projection Location select the icon for desktop use not...

Page 8: ...enu and most of the desktop icons are only displayed on the monitor Any window can be moved between monitor and projector back and forth So in case the main DAVID window is displayed on the projector...

Page 9: ...e focus of the projector with the focus lever so that the stripes are perfectly focused on the object surface 5 Selection of camera Under camera select your camera DAVID CAM 3 1 M The live image from...

Page 10: ...ust the mechanical aperture dial A Consider only those areas in the camera image which show the regular waves The displayed intensity curves red must be sinusoidal and may neither be undersaturated no...

Page 11: ...e size fits to the scanned object The pattern should be slightly larger than the object region to be scanned Fig 4 8 For object sizes above ca 200 mm use the large 240 mm pattern on the back For start...

Page 12: ...position orientation focal length and distortion characteristics of the camera Then a pattern sequence is projected in order to measure the same optical characteristics of the projector If texturing i...

Page 13: ...can please check that the red sine curves are not cropped overdriven relevant only in the areas where the wave pattern is visible If adjustment is necessary adjust the Projector Brightness in the soft...

Page 14: ...filters to 0 If your scans are noisy or wavy you should rather optimize the scanning conditions brightness settings room conditions More smoothing options are available in the Shape Fusion menu later...

Page 15: ...necessary it is advisable not to use the projector as a light source Projector Brightness to 0 but to provide diffuse ambient light in the room In that case of course the monochrome camera can only g...

Page 16: ...nformation can be found on http www david 3d com manual 6 2 Alignment of Multiple Scans Z In general the individual scans are collected via the Add to List button during scanning You can import more s...

Page 17: ...ill be aligned to the green one Successively align more scans to the already aligned scans Always choose pairs that have as much overlap common areas as possible In the above example the next step wou...

Page 18: ...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 more overlap and thus better results To un group click with the right mou...

Page 19: ...accordance with local regu lations You can dispose of the product at your local public point for collection of electronic waste You can also return the product to us for disposal In that case please...

Page 20: ...g light sources During the scan nothing is allowed to move scanner object A scanned per son should lean against sth as comfortably as possible and hold their breath Increase the camera angle at least...

Page 21: ...ke sure that the distance between scanner and object is the same as during the calibration Make sure that both projector and camera are well focused on the scanned object On shiny objects reflections...

Page 22: ...there is the more likely the correct alignment is found If the object has color transitions or markings take a texture with each scan and activate Use Texture when aligning If you have rotated the obj...

Page 23: ...and fuse your Fusion result again instead fuse the original aligned scans Import your Fusion result into the List of Scans click the entry with your right mouse button and select Reduce mesh density T...

Page 24: ...h reimbursement of the purchase price After the warranty period has expired you still have the option of sending the defective device to your supplier or to the DAVID after sales service for repair Re...

Page 25: ...24 2010 EN 61000 3 2 2006 A1 2009 A2 2009 Class A EN 61000 3 3 2008 Camera EN 61000 6 3 06 2005 Class B EN 55022 09 2003 IEC CRISPR 22 EN 61000 6 2 08 2002 Class A EN 61000 4 2 12 2001 EN 61000 4 3 11...

Page 26: ...http www david 3d com BIBUS SK s r o Trnavsk 31 SK 94 901 Nitra Tel 037 7777 911 Fax 037 7777 999 Email 3d bibus sk http www bibus sk...

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