Gene Heskett asks about David Laserscanner:
> I wonder how they compensate for the camera parallax? That would need to be
> calibrated anew every time the camera was setup I'd think
They use a calibration chart with lots of dots. You set up a background
with the two parts of the calibration charts in a 90 degree corner. Take
an image with the camera and they calibrate the camera using this dotted
pattern.
Now the scanner is calibrated to interpret this background as a square
pattern in a 90 deg. angle.
Scanning is done with the object in front of this background and the V
shaped lines on the background are used to calculate the laser's
position and angle.
You can try it out and use it for free but in order to stitch up
multiple scans into one object and create an STL file you need to buy a
license.
I doubt the exact precision of this scanner, I am going for the
NextEngine scanner with RapidWorks to convert scans into CAD models for
SolidWorks.
I just sent them a few photo's of a product I need to scan to see if
they think NextEngine can do this.
Regards,
Rob
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