What's up with the abuse of the word open lately. I had a look at that project to see how they were doing the conversion, but I couldn't find it. But I found this:
Short answer, yes! OpenScanCloud (OSC) is and will stay closed source...
Your data will be transferred through Dropbox and stored/processed on my local servers. I will use those image sets and resulting 3d models for further research, but none of your data will be published without your explicit consent!
I feel like I'd rather use Autodesk at that point. At least I know what I'm dealing with right out of the gate.