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Switti: Designing Scale-Wise Transformers for Text-to-Image Synthesis

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arxiv 2412.01819 v4 pith:T5OAOHY5 submitted 2024-12-02 cs.CV

Switti: Designing Scale-Wise Transformers for Text-to-Image Synthesis

classification cs.CV
keywords generationscale-wiseswittiexistingfasterguidancemodelssampling
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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This work presents Switti, a scale-wise transformer for text-to-image generation. We start by adapting an existing next-scale prediction autoregressive (AR) architecture to T2I generation, investigating and mitigating training stability issues in the process. Next, we argue that scale-wise transformers do not require causality and propose a non-causal counterpart facilitating ~21% faster sampling and lower memory usage while also achieving slightly better generation quality. Furthermore, we reveal that classifier-free guidance at high-resolution scales is often unnecessary and can even degrade performance. By disabling guidance at these scales, we achieve an additional sampling acceleration of ~32% and improve the generation of fine-grained details. Extensive human preference studies and automated evaluations show that Switti outperforms existing T2I AR models and competes with state-of-the-art T2I diffusion models while being up to 7x faster.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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