code: def preprocess_image(self, image: PIL.Image.Image) -> torch.Tensor:
      if not isinstance(image, list):
          image = [image]
  
      def numpy_to_pt(images):
          if images.ndim == 3:
              images = images[..., None]
  
          images = torch.from_numpy(images.transpose(0, 3, 1, 2))
          return images
  
      if isinstance(image[0], PIL.Image.Image):
          new_image = []
  
          for image_ in image:
              image_ = image_.convert("RGB")
              image_ = resize(image_, self.unet.sample_size)
              image_ = np.array(image_)
              image_ = image_.astype(np.float32)
              image_ = image_ / 127.5 - 1
              new_image.append(image_)
  
          image = new_image
  
          image = np.stack(image, axis=0)  # to np
          image = numpy_to_pt(image)  # to pt
  
      elif isinstance(image[0], np.ndarray):
          image = (
              np.concatenate(image, axis=0)
              if image[0].ndim == 4
              else np.stack(image, axis=0)
          )
          image = numpy_to_pt(image)
  
      elif isinstance(image[0], torch.Tensor):
          image = (
              torch.cat(image, axis=0)
              if image[0].ndim == 4
              else torch.stack(image, axis=0)
          )
  
      return image
  
imports: import html
  import inspect
  import re
  import urllib.parse
  from typing import Any, Callable, Dict, List, Optional, Union
  import numpy
  import PIL.Image
  import torch
  from transformers import CLIPImageProcessor, T5EncoderModel, T5Tokenizer
  from ...loaders import LoraLoaderMixin
  from ...models import UNet2DConditionModel
  from ...schedulers import DDPMScheduler
  from ...utils import BACKENDS_MAPPING, PIL_INTERPOLATION, is_accelerate_available, is_bs4_available, is_ftfy_available, logging, replace_example_docstring
  from ...utils.torch_utils import randn_tensor
  from ..pipeline_utils import DiffusionPipeline
  from .pipeline_output import IFPipelineOutput
  from .safety_checker import IFSafetyChecker
  from .watermark import IFWatermarker
label_desc: Use image node_id 9 for calling the IFImg2ImgPipeline obj's underlying member method code with example usage: obj.preprocess_image(image) and returns: image, images