Good question. I went looking for a source and am going to stop now but here are some links.
I suspect the source is one of the social media links here:
https://www.missionjuno.swri.edu/junocam/processing?id=17921
It doesn't give much info for the specifics of how it was processed:
This processed view enhances cloud-top texture and reveals swirling filaments, compact vortices, and bright high-altitude clouds embedded in a chaotic flow.
It does list the source data for processing as this:
https://www.missionjuno.swri.edu/junocam/processing?id=JNCE_2023250_54C00143_V01
Here is a brief summary of the instrument from one of the groups involved with the Junocam: