3d structured light scanning
Just for the experiment, I wanted to make a perfect fit last, the easiest and cheapest way possible, so I needed a 3d model, of a foot. But I'm really a bad 3d modeler, so I had to figure out a way to scan it. Matthijs came with a pretty usefull solution, Matthijs is the one who worked on this 3d scanner: http://amsterdam.fablab.nl/node/3363/.
He told me that I should have a look at 3d structured light scanning, for that you only need a picoprojector a camera and a piece of open source free software. All the information regarding this matter you can find it here: http://wiki.makerbot.com/3d-scanner
And here you will find all the information about the software setup: http://wiki.makerbot.com/computer-software
I made a little magic-box for the pico projector (optoma pk102 make shure that I will have the camera perfectly alligned with the beamer. (picture will follow)
Once you have al your hardware, and software configured, you can start taking pictures. I scanned my own foot, I used a Canon eos slr camera with an infrared receiver. On the PK102 fits 4 gb of data, you simply upload the 3 striped images, and let it run as a slideshow.
When the slideshow was running, I used the remote to let the camera take pictures.
These are the 3 pictures I used for the outside of my foot:
In the order you take the pictures, you must name them, phase1, phase2 and phase3 in chronological order. No capitals either.
Now you can start adjusting the zskew and zscale. This is what I made out of it:
then you can save it as a mesh, (or a pointcloud) and open it in Meshlab, ( http://meshlab.sourceforge.net/ ) to clean up the file you have. And save it as an stl for example, now you can edit it in Rhino, to make it shopbot ready.
Opened in Rhino, after a cleaning in meshlab, and a poison mesh.
Next step: putting it through the router