An Empirical Study and Analysis of Text-to-Image Generation Using Large Language Model-Powered Textual Representation

• URL: http://arxiv.org/abs/2405.12914v2
• Date: Thu, 18 Jul 2024 05:14:19 GMT
• Title: An Empirical Study and Analysis of Text-to-Image Generation Using Large Language Model-Powered Textual Representation
• Authors: Zhiyu Tan, Mengping Yang, Luozheng Qin, Hao Yang, Ye Qian, Qiang Zhou, Cheng Zhang, Hao Li,
• Abstract summary: Existing methods leverage the text encoder of the CLIP model to represent input prompts. Large Language Models (LLMs) offer multilingual input, accommodate longer context, and achieve superior text representation. We propose a lightweight adapter that enables fast training of the text-to-image model using the textual representations from LLMs.
• Score: 21.154973705998945
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: One critical prerequisite for faithful text-to-image generation is the accurate understanding of text inputs. Existing methods leverage the text encoder of the CLIP model to represent input prompts. However, the pre-trained CLIP model can merely encode English with a maximum token length of 77. Moreover, the model capacity of the text encoder from CLIP is relatively limited compared to Large Language Models (LLMs), which offer multilingual input, accommodate longer context, and achieve superior text representation. In this paper, we investigate LLMs as the text encoder to improve the language understanding in text-to-image generation. Unfortunately, training text-to-image generative model with LLMs from scratch demands significant computational resources and data. To this end, we introduce a three-stage training pipeline that effectively and efficiently integrates the existing text-to-image model with LLMs. Specifically, we propose a lightweight adapter that enables fast training of the text-to-image model using the textual representations from LLMs. Extensive experiments demonstrate that our model supports not only multilingual but also longer input context with superior image generation quality.

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