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Diffusion Lens: Interpreting Text Encoders in Text-to-Image Pipelines

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arxiv 2403.05846 v2 pith:VWAN3P6K submitted 2024-03-09 cs.CV cs.CL

classification cs.CVcs.CL
keywords textdiffusionencoderlensmodelsrepresentationcomparedconcepts
verification ladder T0 review T1 audit T2 compute T3 formal

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Text-to-image diffusion models (T2I) use a latent representation of a text prompt to guide the image generation process. However, the process by which the encoder produces the text representation is unknown. We propose the Diffusion Lens, a method for analyzing the text encoder of T2I models by generating images from its intermediate representations. Using the Diffusion Lens, we perform an extensive analysis of two recent T2I models. Exploring compound prompts, we find that complex scenes describing multiple objects are composed progressively and more slowly compared to simple scenes; Exploring knowledge retrieval, we find that representation of uncommon concepts requires further computation compared to common concepts, and that knowledge retrieval is gradual across layers. Overall, our findings provide valuable insights into the text encoder component in T2I pipelines.

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Cited by 5 Pith papers

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