#02_ First we need to render the background and character Openpose bones separately. We will use them for Depth2image and Pose2image respectively. I used Blender.
#03_ The reason for using the rendered depth rather than the automatically generated depth is that the sharper the boundary of the depth, the better the detail and sharpness of the image. Top: Rendered depth / Bottom: Auto-generated depth
#02_ The only image the Openpose model needs is an openpose skeleton. The use of images of real people is due to the Gradio UI, according to the developer's comments.
#03_ So I used Blender to create a simple character that looks like an Openpose skeleton. You can download it for free here. :toyxyz.gumroad.com/l/ciojz