核心概念
SPI-GANは、高いサンプリング品質と多様性を実現しつつ、サンプリング時間を劇的に短縮する手法であり、CIFAR-10とCelebA-HQ-256のデータセットにおいて最もバランスの取れたモデルの1つである。
要約
ABSTRACT
Score-based generative models (SGMs) offer high sampling quality and diversity.
Training/sampling complexity of SGMs is a challenge in resource-limited settings.
SPI-GAN introduces a denoising method using straight-path interpolation, reducing sampling time while maintaining quality.
1. INTRODUCTION
Generative models like diffusion models have gained popularity.
SGMs show good performance but suffer from long sampling times.
SPI-GAN proposes a hybrid method for denoising through straight-path interpolation.
2. RELATED WORK AND PRELIMINARIES
Neural ordinary differential equations (NODEs) are used to model continuous evolving processes.
Letting GANs imitate SGMs has shown balanced performance in generative tasks.
3. PROPOSED METHOD
DIFFUSION THROUGH THE FORWARD SDE
Forward SDE can be calculated with one-time computation for a target time t.
STRAIGHT-PATH INTERPOLATION
SPI-GAN simplifies the denoising process by using straight-path interpolation.
MAPPING NETWORK
The mapping network generates latent vectors at various interpolation points for image generation.
GENERATOR & DISCRIMINATOR
Customized generator architecture mimics stochastic properties of SGMs.
Time-dependent discriminator classifies images from various interpolation points.
4. EXPERIMENTS
MAIN RESULTS
SPI-GAN outperforms other methods in terms of quality metrics and sampling time on CIFAR-10 and CelebA-HQ-256 datasets.
ADDITIONAL STUDIES
SPI-GAN maintains fast sample generation time post-training compared to other methods.
5. CONCLUSIONS AND DISCUSSIONS
SPI-GAN offers a balanced solution to the generative task trilemma, showcasing high-quality samples with reduced sampling time.
統計
SPI-GANは、CIFAR-10でInception Scoreが10.2、FIDが3.01を達成しました。
Diffusion-GANは、StyleGAN2と比較してFIDが3.19です。