I’m using media pipe to get the face landmarks of a face in a photo, then I get the 3d points of those landmarks and put them in 3d space in open3d.
I have the point cloud of the scene related to the image and with all the camera parameters(intrinsix and extrinsic), i use open3d to visualize the point cloud in the same view angle of the photo, then i took depth image of the point cloud.