Progressive Artwork Outpainting Via Latent Diffusion Models

Figure 1. Outpainting comparisons between single-step (a) and progressive approaches (b,c). (a) Results of the single-step outpainting. We first resize the input image to a fixed size suitable for a conventional outpainting model, and then apply outpainting. After that, we revert the image to its original aspect ratio. Finally, we use a super-resolution model to restore the reduced resolution. (b) Results of progressive outpainting without consideration of overall composition. (c) Results of our method with global context consideration and planning. The red bounding boxes indicate the inputs.

Progressive approach enables outpainting in any direction and produces high-fidelity, high-resolution images with no restrictions on aspect ratio. Furthermore, our method produces globally harmonious outpainting results compared to models that do not take overall composition into account.