Image striping when acquiring data with a commutator - discussion about miniscope-v4 HOT 5 OPEN

Which commutator are you using?

e.g. the Open Ephys commutator is a mil-spec grade RF rotary joint that maintaines 50-ohm transmission line through the commutation point (less chance for data corruption than slip ring with no impedance control) that we have testing for hundreds of hours continuous use without issue.

https://open-ephys.org/commutators/coaxial-commutator
https://open-ephys.github.io/commutator-docs/

and that is compatilbe with miniscope v4.

from miniscope-v4.

Currently using a passive slip ring commutator from Moog that uses a 50Ohm coaxial line for the scope.

from miniscope-v4.

OK, yes. That does not maintain 50-ohm transmission line. Introduces discontinuity which results in signal distortion. This is exacerbated by the fact that its right in the middle of the cable (assuming you have a sizable length of coax on either side). This may not be the issue, but it certainly wont help.

from miniscope-v4.

Yeah I agree the occasional discontinuity from the slip ring is the root cause. The OEPS commutator only support 1 scope for purchase (right?), and I'm using two miniscopes through the commutator and keeping the cabling in and out fairly short (1.5-2.0m on animal side, 5-10cm on DAQ side). I see the OEPS design for 2 scopes is available on the dev site, but I don't have the capacity to fabricate one right now.

I was hoping there could be a software solution to detecting and resolving the striping. Perhaps using a real-time template matching or just a user interface to reset the buffer if they notice it occurring to prevent the stable offset situation from persisting too long during a recording.

from miniscope-v4.

I developed a decent fix for the static banding issue - see the demo video and matlab script in my miniscope banding repo

edit - @daharoni fyi, if this helps things

from miniscope-v4.