Paper page - MirrorPPR: Exemplar-Based Portrait Photo Retouching

Source: https://huggingface.co/papers/2606.29308

Abstract

Exemplar-based portrait retouching framework using Diffusion Transformer with LoRA adaptation and self-augmented training data achieves superior quality and identity preservation.

While text-guided image editing has made remarkable progress, it remains limited in structural portrait retouching. Textual descriptions struggle to convey fine-grained changes to facial features and body proportions. To address this gap, we introduce Exemplar-Based Portrait Photo Retouching, where the model is given an exemplar pair and tasked with inferring and applying the same retouching operations to a new query image. Existingexemplar-based editingmethods primarily focus on tasks with pronounced visual transformations. In contrast, structural portrait retouching involves extremely delicate and localized modifications, making accurate extraction and transfer of these edits challenging. To tackle this, we propose MirrorPPR, a novel framework designed to capture and transfer subtle structural retouching operations. Our method uses aRetouching Operation Extractorto capture the subtle differences from the exemplar pair. The extracted representations are then injected into a pre-trainedDiffusion Transformer(DiT) through a connector andLow-Rank Adaptation(LoRA) modules. Furthermore, constructing perfectly alignedcross-identity training pairsis severely hindered by operation misalignment. To overcome this, we propose an advanceddata self-augmentationparadigm that ensures strictly aligned retouching operations. To alleviate data scarcity and support this novel task, we introduce MirrorPPR47M, a large-scale dataset with over 47 million retouched pairs. By structuring the dataset into simulated and professional subsets, we enable progressivecurriculum learningto smoothly optimize the network. Extensive experiments demonstrate that MirrorPPR significantly outperforms existing baselines in both retouching quality and identity preservation. The project page is available at https://sjtu-deng-lab.github.io/MirrorPPR.

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