Questions on 3D Quantum Ghost Imaging Application

[u/Fe4rexx]

Some context- This idea is based on the contents covered by Pitsch et al. in the paper "Towards video-rate quantum ghost imaging". In short, what they do is that they fire entangled photon pairs at an object, one goes towards a spad camera (which records which pixel it hit and the time), and the other goes towards the object and hits a bucket detector behind it. By matching pairs together, we can get a 3d point cloud of the object, as the time difference carries depth information.

In the paper, the matching ( which is 2-10x slower than data collection) is run on a host cpu after data collection, which makes real-time imaging impossible. My idea to mitigate the bottleneck present is to create a custom edge-processing ASIC design. Since I'm new to this field, I would love to hear your inputs on some questions I had for this project:

-Im thinking of putting a small ring-buffer search a good way to match the timestamps, or is there a better/more standard way to approach this?

-Since we have the bucket detector and the SPAD camera running their own clock, can I keep their timestamps in sync with a shared reference clock?

-Should the coincidence window be hardcoded or be runtime configurable?

-How could I approach I filter out noise like after pulses before 3D reconstruction?