h-Edit: Effective and Flexible Diffusion-Based Editing via Doob's h-Transform

• URL: http://arxiv.org/abs/2503.02187v1
• Date: Tue, 04 Mar 2025 01:49:59 GMT
• Title: h-Edit: Effective and Flexible Diffusion-Based Editing via Doob's h-Transform
• Authors: Toan Nguyen, Kien Do, Duc Kieu, Thin Nguyen,
• Abstract summary: h-Edit is a training-free method capable of performing simultaneous text-guided and reward-model-based editing.<n>Our experiments show that h-Edit outperforms state-of-the-art baselines in terms of editing effectiveness and faithfulness.
• Score: 13.243229817244275
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We introduce a theoretical framework for diffusion-based image editing by formulating it as a reverse-time bridge modeling problem. This approach modifies the backward process of a pretrained diffusion model to construct a bridge that converges to an implicit distribution associated with the editing target at time 0. Building on this framework, we propose h-Edit, a novel editing method that utilizes Doob's h-transform and Langevin Monte Carlo to decompose the update of an intermediate edited sample into two components: a "reconstruction" term and an "editing" term. This decomposition provides flexibility, allowing the reconstruction term to be computed via existing inversion techniques and enabling the combination of multiple editing terms to handle complex editing tasks. To our knowledge, h-Edit is the first training-free method capable of performing simultaneous text-guided and reward-model-based editing. Extensive experiments, both quantitative and qualitative, show that h-Edit outperforms state-of-the-art baselines in terms of editing effectiveness and faithfulness. Our source code is available at https://github.com/nktoan/h-edit.

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