ideo-Zero text2video unCLIP text2image, image variation Unconditional Latent Diffusion unconditional image generation UniDiffuser text2image, image2text, image variation, text variation, unconditional image generation, unconditional audio generation Value-guided planning value guided sampling Versatile Diffusion text2image, image variation VQ Diffusion text2image Wuerstchen text2image  DiffusionPipeline  class diffusers.DiffusionPipeline  < sou