Hi Benoit ,
Single frame capture can be used to capture just a single frame however that single frame do not complete the whole 3D capture , it is still in 2D mode , more compared to displacement map where the details appear only on the Z axis.
To complete a full single frame capture you still need to rotate the object at minum 20% overlapping, this technique can be compared to a photogrammetry capture workflow .
So in place of 350 frames at 360 degrees, you can capture 24 frames to complete a model .
Single frame capture do not affect any point density or distance , neither continues scanning do , 3D structured light scanners have hardware based point distance by default and can’t be changed for higher density, as that would allows s change of accuracy what is impossible .
So Single frame capture creates the same point distance as the hardware offers regardless how many frames you capture .
PROS: Using single capture frame allowing to have better control over scanned surface , reduce processing time , higher precision , shorter processing time , less resource .
CONS: Longer scanning time since it is manual process, in some situations manual rotation of the scanned object is required. If object is moved manually beyond 20% of required overlapping, bad alignment can still accure, since single frame capture still require proper alignment if used as multiple frames scanning method. Scanned objects should be completely still , for that reason scanning humans using single frame is not recommended, since humans don’t stay still and single breathing can interrupt the proper alignment .
Of course and it is the priority method for scanning and never will be for all situations. Single frame capture is just additional scanning option to use in specific situations that require it , but it is not a replacement for continuous scanning method that allows Revopoint scanners to be more fast and portable .