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3D Scanning (What? (The collected data can then be used to construct…
3D Scanning
What?
A process to
collect data
of a physical object on its shape and possibly its appearance.
Data is in the form of [Point-Cloud.]
3D Point Cloud Editor
The collected data can then be used to construct digital three-dimensional models (CAD model).
From Point-Cloud to STL
Challenge when converting Point-cloud to "Mesh" format.
The raw mesh data is not very good. All mesh files must be fine tweaked to get a high quality output.
Holes in the mesh must be filled in.
Manual cleaning of the Mesh give a better result.
GeoMagic - A software to post-process the point-cloud to mesh
Use in
Reverse Engineering
Replicating parts that have no CAD data
Documenting Museum Pieces
Creating digital data of engineering mockups such as clay or wood
Creating 3D data files of the human face or figure
Medical Device fitting
Scaled model of an artist's creation
Computer Aided Inspection
Comparing CAD model with the scanned data
How?
Contact Type (known as Digitiszer)
Using Touch-probe
Co-ordinate Measuring Machine
[Larger Size]
Mostly used for Part Inspection
Non-Contact type
Laser Triangulation Scanning
Create a 3D image through the triangulation mechanism
Link Title
Principle of a laser triangulation sensor. Two object positions are shown.
The laser probe projects a line of laser light onto the surface while 2 sensor cameras continuously record the changing distance and shape of the laser line in three dimensions (XYZ) as it sweeps along the object.
Structured light 3D scanning
projection of patterns consisting of many stripes at once and a camera system.
Link Title
Photogrammetry
Preparation before 3D printing
Convert Point-Cloud to STL format
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