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MAS.863.10 Masoud Akbarzadeh MArch | SMArchs | Computation
How to Make almost everything MIT department of Architecture
       
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3D scanning and printing |  
   
   
3D scanning |  
   
   
   
   
   
   
     

The assignment for this week was to scan an object with 3D scanner device. I decided to scan the face of my freind to explore the actual performance of this technology for further studies .

 
 
 
 
 
 
 
 
 
 
 
 
 
 

ZScanner 700 CX, Weight 0.98 kg, Laser Class II (eye safe), Accuracy up to 50 microns

    

The first step was to provide the device some benchmark that can be used later as reference points for calculations. it calculates the geometry of the surface through interpolation of the geometry of the surface and the reference points. The points are some reflective sticks that was provided with the device.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Scanning the dots    

After putting the sticks, the scanner was used to step to recegnize all the white spots and save them as reference geometry of the object

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Scanning the surface    

The next step in the process is to fill the geometrical gap between the reference points on the surface. This step is quite comparable to paiting the surface with the device between the reference points.

 
 
 
 
 
 
 
 
 
The coordination of the skin was below the actual surface of the face  
   
   
   
   
   
   
   
     

There is a post processing step as well, which is to fill the gaps or irregularities that device couldn't calculate during the scanning. The observed problem with the scanned surface was that the geometry had some incorrect change in height in some points. Further investigations revealed that that was the result of the difference between the height of the sticks and the actual height of the skin. In other word, the actual calculated reference point was above the actual scanned surface. As a result, there were some bumped spots on the scanned surface.


 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Deleting the incorrect geometry and recreating the new one using the _mesh from closed polylines    

The surface later was refined by Rhinoto smoothen the incorrect geomtery.

 
       
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