Hi @ahuilove , I'm not sure if I got your question correctly.
if you are referring to overlaying the 3D model on the image, you may refer to this section.
if you are referring to obtain the 3D human mesh, our npz contain all necessary SMPL-X parameters, you may use the forward function to obtain the vertices and faces as in here.
For each image,while inferencing,there is a npz file in output.So how can I recover 3D model image using the npz file