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Yoonseok Choi

2 papers indexed

arxivcs.CV2026-07-18

DRIFT: Difficulty-aware Rectified Flows for Through-plane MRI Super-Resolution

Yoonseok Choi, Eun-Gyu Ha, Daniel Kim, Mohammed A. Al-masni, Ming-Hsuan Yang, Dong-Hyun Kim

Magnetic Resonance Imaging (MRI) is often acquired with anisotropic resolution to reduce scan time, producing stair-step artifacts along the through-plane direction. In through-plane MRI super-resolution, an efficiency-fidelity trade-off arises: feed-forward regressors are fast b…

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arxivcs.CV2026-06-29

Concept Removal Guidance: Evidence-Calibrated Negative Guidance for Safe Diffusion Sampling

Yoonseok Choi, Chaeyoung Oh, Hyunjun Choi, Seokin Seo, Kee-Eung Kim

Text-to-image diffusion models remain vulnerable to adversarial prompts that elicit disallowed content, motivating reliable inference-time controls. A popular approach is negative guidance, which subtracts a negative prompt direction with a fixed weight. However, it often forces…

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