sd-controlnet-depth model for PPDiffusers

Thanks

  https://huggingface.co/lllyasviel/ControlNet
  
  for the implementation and the release of 1.5 models.


  https://github.com/PaddlePaddle/PaddleNLP/tree/develop/ppdiffusers/scripts/convert_diffusers_model
  
  for the conversion script to PPDiffusers