Diffusion-based skin disease data augmentation with fine-grained detail preservation and interpolation for data diversity
Table 5
Quantitative ablation study on VAE channel width and multi-level embeddings.
We evaluated three variants using FID and IS metrics: 4-channel VAE (4ch), 8-channel VAE (8ch), and 8ch model with multi-level CLIP embeddings (8ch+ML). Both 8ch and 8ch+ML variants demonstrated improved FID and IS scores compared to 4ch. However, the IS score for 8ch+ML showed a slight decrease compared to the standalone 8ch model, suggesting that excessive learning of fine-grained features through multi-level embeddings may reduce sample diversity.