arXiv AI By Trong-Thang Pham, Loc Nguyen, Anh Nguyen, Hien V. Nguyen, Ngan Le

PolypSteer: Counterfactual Endoscopic Synthesis via Training-Free Activation Steering

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arXiv:2603. 07066v2 Announce Type: replace-cross Abstract: Generative diffusion models are increasingly used for medical imaging data augmentation, but text prompting cannot produce causal training data.

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Text-to-image (T2I) diffusion models have achieved striking progress but still struggle to synthesize rare concepts involving unusual attribute-object pairings, often resulting in concept omission or semantic drift where a dominant entity overwhelms the generation. Tracing these failures to a lack of compositional balance during the denoising trajectory, we propose RADIANCE, a training-free framework that treats inference as a closed-loop feedback process.

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