How to interpolate between two 2D pose-frames (each containing 18 joints)

[mmdrahmani]

Hi.
I have a question regarding interpolation between to poses.

I have two images (frames) and I extracted YX positions of 18 joints (see the figure). I would like to interpolate between these two pose-frames, one frame as starting pose, and the other image as end pose. I wonder if this is possible , and how.

Thanks