We propose pix2pix-zero, a diffusion-based image-to-image approach that allows users to specify the edit direction on-the-fly (e.g., cat to dog). Our method can directly use pre-trained Stable Diffusion, for editing real and synthetic images while preserving the input image's structure. Our method is training-free and prompt-free, as it requires neither manual text prompting for each input image nor costly fine-tuning for each task.

TL;DR: no finetuning required, no text input needed, input sturcture preserved.

All our results are based on stable-diffusion-v1-4 model. Please the website for more results.

Given an input image, we first generate text captions using BLIP and apply regularized DDIM inversion to obtain our inverted noise map. Then, we obtain reference cross-attention maps that correspoind to the structure of the input image by denoising, guided with the CLIP embeddings of our generated text (c). Next, we denoise with edited text embeddings, while enforcing a loss to match current cross-attention maps with the reference cross-attention maps.

Comparisons with different baselines, including, SDEdit + word swap, DDIM + word swap, and prompt-to-propmt. Our method successfully applies the edit, while preserving the structure of the input image.