arXiv:2508.03144cs.CV2025-08被引 3

通过优化潜在空间噪声,实现精准可控的文本图像编辑。

LORE: Latent Optimization for Precise Semantic Control in Rectified Flow-based Image Editing

  • 直接优化反演噪声,解决语义偏差问题
  • 在三个基准上显著提升语义对齐与图像质量
  • 无需训练或修改模型,适合通用编辑场景

文本驱动图像编辑允许用户通过自然语言灵活修改视觉内容,广泛应用于语义对象替换、插入和移除等任务。尽管基于逆向生成的矩形流模型方法在图像质量上取得良好效果,但本文发现其存在结构性缺陷:反演噪声中编码的源概念语义倾向会抑制对目标概念的关注。当源与目标语义差异较大时,注意力机制导致编辑失败或非目标区域出现意外修改。为此,本文系统分析并验证该问题,提出无需训练的高效编辑方法LORE。LORE直接优化反演噪声,解决现有方法在泛化性和可控性上的核心局限,实现稳定、可控且通用的概念替换,无需架构改动或模型微调。我们在PIEBench、SmartEdit和GapEdit三个挑战性基准上进行了全面评估,结果表明LORE在语义对齐、图像质量和背景保真度方面显著优于强基线,验证了潜在空间优化在通用图像编辑中的有效性和可扩展性。代码已开源:https://github.com/oyly16/LORE。

原文摘要 · Abstract (English)

Text-driven image editing enables users to flexibly modify visual content through natural language instructions, and is widely applied to tasks such as semantic object replacement, insertion, and removal. While recent inversion-based editing methods using rectified flow models have achieved promising results in image quality, we identify a structural limitation in their editing behavior: the semantic bias toward the source concept encoded in the inverted noise tends to suppress attention to the target concept. This issue becomes particularly critical when the source and target semantics are dissimilar, where the attention mechanism inherently leads to editing failure or unintended modifications in non-target regions. In this paper, we systematically analyze and validate this structural flaw, and introduce LORE, a training-free and efficient image editing method. LORE directly optimizes the inverted noise, addressing the core limitations in generalization and controllability of existing approaches, enabling stable, controllable, and general-purpose concept replacement, without requiring architectural modification or model fine-tuning. We conduct comprehensive evaluations on three challenging benchmarks: PIEBench, SmartEdit, and GapEdit. Experimental results show that LORE significantly outperforms strong baselines in terms of semantic alignment, image quality, and background fidelity, demonstrating the effectiveness and scalability of latent-space optimization for general-purpose image editing. Our implementation is available at https://github.com/oyly16/LORE.

图像编辑潜在优化文本控制无训练

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