#david 3d

Today, I had the fortunate opportunity to take advantage of a 3D scanning workshop that was sponsored by Konica-Minolta.  The timing was perfect since (for my new design of SweetVision mobile) I am using the Nokia 808 and had to reverse engineer its exact shape so I could build a custom case around it and then have the first prototype sent out for 3D printing.  Before this workshop, my first scanning attempt was a DIY method using the free version of 'David 3D scanning' software along with a LED projector for Structured Light Scanning (SLS) of the phone.  My results were good but I think since I used a varifocal lens on my camera, the output was not captured to scale (+15%).  I didn't spend much time tweaking the system but if I did, I understand I could of gotten an accuracy of around 0.1% of the object size.  Not bad for a total 3D scanning system costing less than $500 (< $100 if I used a line laser).

I hustled down to the workshop this morning and sat down with all my gadgets laid out on the table to stir curiosity.  Right away, I was asked if I had a part to scan and after introducing my iPhone endoscope imaging system, they got right to work.

The representatives there were very knowledgeable and informative in regards to the techniques they were using and current state of 3D scanning.  One thing that was interesting is how they used talcum powder and a brush on the black and shiny surfaces in order to make them apparent with the scans (I love simple solutions!).  In total, they took about 18 scans to create the final CAD file and the accuracy was right on spot at .2 mm.