Except for the obvious image copy without attribution, it doesn't seem to be. At first blush it looks to be a specific application of the previous paper's technique(s).
Why?
Why?
The two papers share (part of) a picture that may or may not have been original in either paper.
I haven’t checked which paper was published earlier, but that likely is the second (it cites a 2017 paper, while the first is from a 2015 conference)