I have more than 130 photos taken with a turntable, and the result of the alignment in RealityCapture is very confusing, only one face can be recognized.
But when I use other software, such as Metashape, the alignment results are very good. I wonder if there is any setting in RealityCapture to solve this problem? 
I’ve tried adding a lot of control points, but I can’t seem to get the alignment to look slightly better.
Original photo:
RealityCapture：
Metashape：
Hi FYQD,
the problem here is that there is visible background. RealityCapture found some features in the background and they are used for alignment. As they are still the same (as camera is still on the same position) it is considered as images are taken from one spot. To solve this you will need to use images masks which will cover the background.
It looks like RealityCapture still has a lot to improve on this type of image alignment, I re-shot around the object and it works fine now.
Yes the problem is that its the reverse of most photogrammetry workflows - where the camera moves around the scene. Since the camera does move / the item scanning moves / and the rest of the scene is stationary it confuses the engine.
Agisoft just came out with a solution for this - called “exclude stationary tie points” that does just this perfectly.
heres a blog post on someone using it if that helps !
Is there any timeframe on when we will get this in Reality Capture ? It would be amazing for people with huge amounts of small items to scan using a turntable!
In the mean time, there are a few tools out there than can clean the background but they all seem to blur the edges of the images…
it would be great to see if this is on the RC roadmap !
thanks !
soulbank, thank you for your ideas, it was added to our feature requests database.
Great discussion! Thank you so much for these informations
metashape is amazing at this ! have done a few turntable projects and the results are better than expected 
any news about turntable scanning?
This feature is extremely needed for a lot of people and necessary if you’d like to compete in the photogrammetry world 
Thanks, your vote was added to the database.
Just checking in to see if this works in RC 1.5 yet ? I have a huge amount of turntable scans to process and will need to use metashape if RC cant manage them…
Have you tried to use a uniform background? I have successfully processed many turntable scans in RC. All I did, was use a kompletely black background using black fabric and having it as far behind the object I was scanning, so it would not be in focus. Then I lit my foreground object in a way, that the background did not receive any light.
I also use cross polarization for the lights and the camera to make sure I eliminate all specular reflections, also on the black clith in the back.
If all that the camera sees is the object and the turntable, this works like a charm.
Cheers
Guillaume
