because images are actually cropped during training so that all the images in a batch have the same size. By conditioning on crop coordinates, SDXL learns that no cropping - coordinates (0, 0) - usually correlates with centered subjects and complete faces (this is the default value in 🤗 Diffusers). You can experiment with different coordinates if you want to generate off-centered compositions!   Copied from diffusers import StableDiffusionXLPip