3D scanning of small and complicated parts Answered
I am trying to get a proper understanding of the things involved when scanning small parts with features bad for scanning, like circuit boards or things that simply are not as smooth as the test objects seen in tutorials.
Due to the limitations I gave up on laser scanning for this although I still prefer it for bigger parts with less features.
Photogrammetry works, well sort of...
Most programs require the cam to move around the object, which is pretty much useless for parts smaller than 3cm³ in size.
But even if the software claims to be able to use turntables I still struggle massively getting any usable results.
I had testversions of 3D flow's Zephire and Agisoft Photoscan, both are able to use masks which helps a lot but they struggle with the camera positions.
No matter what I do and how I try to cheat the cams are always located at a max of 180° but never the full 360°
Agisoft would allow to enter cam positions but the algorthm behind it is beyond my understanding.
So far my approach was to mask the background out and if the cam alignment failed (which it always did) to manually add reference points into the single pics.
But still no 360° scans but a lot of cams in the exact same location.
I know a 8MP DSLR is not perfect but the image quailty is decent enough for all the details.
Is there a software out there that is dedicated for turntable use but is no laser scanning software?
Or maybe a program / plugin to calculate cam positions for a turntable if the cam location is actually fixed?
I mean with a turntable and fixed cam I would expect that all cam positions in the model are at least at the level and distance but in some cases it looked more like a wave pattern.
My ultimate goal is to go down in size to about 5mm³ in size, like insects and tiny machine parts.
Zephyr Pro seems to be right tool for the job but it out of my reach price wise as I only do 3D as a hobby.
123D and other cloud services fail totally for this task for the obvious reasons of size and fixed cam.