How to estimate 2D keypoints of est_p2ds? The estimator seems to be not trained with COCO, MPI and other datasets.

[chageand]

The estimated 2d keypoints (below image) of MuPoTS dataset (est_p2ds) are different from COCO, MPI and other popular datasets.
How to estimate them with 2d pose estimator?
In GnTCN paper (the same author proposed), they used hrnet original, but I don't know what datasets they trained it with.