TPSO: Training-Free Diverse Image Generation via Semantic Prompt Embedding Optimization
Extensive experiments on MS-COCO across three representative diffusion backbones demonstrate that TPSO substantially improves diversity, boosting performance from 1.10 to 4.18, while maintaining image quality with only a modest inference-time overhead.
Debin Meng, Chen Jin, Zheng Gao et al.
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