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Improving Long-Text Alignment for Text-to-Image Diffusion Models
2025-01-22
· ICLR 2025 Poster ·
anchor
Findings
IC-645
CLIP, PickScore, and HPSv2 text embeddings share a common direction (cone effect) that captures text-irrelevant preferences, and the orthogonal component c⊥p better measures T2I alignment; CLIP's untrained common direction makes it ineffective for reward fine-tuning