: Research by related groups (such as Ranzato et al. ) focuses on producing "deep feature hierarchies" by stacking unsupervised modules, similar to how deep belief networks function.
: It uses variational inference (a technique often used in deep generative models) to obtain sparse, non-negative representations of concepts. ViceHD
Latent Diffusion Model for Video Counterfactual Explanations : Research by related groups (such as Ranzato et al