Inversion-Free Style Transfer with Dual Rectified Flows

Fuente: arXiv
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Main Authors: Deng, Yingying, He, Xiangyu, Tang, Fan, Dong, Weiming, Yin, Xucheng
Format: Preprint
Published: 2025
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author Deng, Yingying
He, Xiangyu
Tang, Fan
Dong, Weiming
Yin, Xucheng
author_facet Deng, Yingying
He, Xiangyu
Tang, Fan
Dong, Weiming
Yin, Xucheng
contents Style transfer, a pivotal task in image processing, synthesizes visually compelling images by seamlessly blending realistic content with artistic styles, enabling applications in photo editing and creative design. While mainstream training-free diffusion-based methods have greatly advanced style transfer in recent years, their reliance on computationally inversion processes compromises efficiency and introduces visual distortions when inversion is inaccurate. To address these limitations, we propose a novel \textit{inversion-free} style transfer framework based on dual rectified flows, which tackles the challenge of finding an unknown stylized distribution from two distinct inputs (content and style images), \textit{only with forward pass}. Our approach predicts content and style trajectories in parallel, then fuses them through a dynamic midpoint interpolation that integrates velocities from both paths while adapting to the evolving stylized image. By jointly modeling the content, style, and stylized distributions, our velocity field design achieves robust fusion and avoids the shortcomings of naive overlays. Attention injection further guides style integration, enhancing visual fidelity, content preservation, and computational efficiency. Extensive experiments demonstrate generalization across diverse styles and content, providing an effective and efficient pipeline for style transfer.
format Preprint
id arxiv_https___arxiv_org_abs_2511_20986
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Inversion-Free Style Transfer with Dual Rectified Flows
Deng, Yingying
He, Xiangyu
Tang, Fan
Dong, Weiming
Yin, Xucheng
Computer Vision and Pattern Recognition
Style transfer, a pivotal task in image processing, synthesizes visually compelling images by seamlessly blending realistic content with artistic styles, enabling applications in photo editing and creative design. While mainstream training-free diffusion-based methods have greatly advanced style transfer in recent years, their reliance on computationally inversion processes compromises efficiency and introduces visual distortions when inversion is inaccurate. To address these limitations, we propose a novel \textit{inversion-free} style transfer framework based on dual rectified flows, which tackles the challenge of finding an unknown stylized distribution from two distinct inputs (content and style images), \textit{only with forward pass}. Our approach predicts content and style trajectories in parallel, then fuses them through a dynamic midpoint interpolation that integrates velocities from both paths while adapting to the evolving stylized image. By jointly modeling the content, style, and stylized distributions, our velocity field design achieves robust fusion and avoids the shortcomings of naive overlays. Attention injection further guides style integration, enhancing visual fidelity, content preservation, and computational efficiency. Extensive experiments demonstrate generalization across diverse styles and content, providing an effective and efficient pipeline for style transfer.
title Inversion-Free Style Transfer with Dual Rectified Flows
topic Computer Vision and Pattern Recognition
url https://arxiv.org/abs/2511.20986