 w of equation 2. of Imagen
Paper. Guidance scale is enabled by setting guidance_scale > 1. Higher guidance scale encourages to generate images that are closely linked to the text prompt,
usually at the expense of lower image quality.   output_type (str, optional, defaults to "pt") —
The output format of the generate image. Choose between: "np" (np.array) or "pt"
(torch.Tensor).   return_dict (bool, optional, defaults to True) —
Whether or not 