Confusion about multi-pass upsampling #8
Description
Hi @Marc-3d. Thanks for the very cool package. I have a question regarding the implementation of multi-pass. It seems that regardless of the number of multi-passes, the output displacement fields are not up-sampled. I would have thought that with increasing number of multi-passes, the resolution of the output displacement fields would increase. At least this is the case in the openpiv package in Python. Can you explain what differs about this implementation?
As an aside, have you considered adding GPU options to this code? I'm completely unfamiliar with the ways one would do this in Julia, or how difficult it would be, so I was curious if you have thought about it.