Bridging Different Language Models and Generative Vision Models for Text-to-Image Generation (2403.07860v1)

Abstract: Text-to-image generation has made significant advancements with the introduction of text-to-image diffusion models. These models typically consist of a LLM that interprets user prompts and a vision model that generates corresponding images. As language and vision models continue to progress in their respective domains, there is a great potential in exploring the replacement of components in text-to-image diffusion models with more advanced counterparts. A broader research objective would therefore be to investigate the integration of any two unrelated language and generative vision models for text-to-image generation. In this paper, we explore this objective and propose LaVi-Bridge, a pipeline that enables the integration of diverse pre-trained LLMs and generative vision models for text-to-image generation. By leveraging LoRA and adapters, LaVi-Bridge offers a flexible and plug-and-play approach without requiring modifications to the original weights of the language and vision models. Our pipeline is compatible with various LLMs and generative vision models, accommodating different structures. Within this framework, we demonstrate that incorporating superior modules, such as more advanced LLMs or generative vision models, results in notable improvements in capabilities like text alignment or image quality. Extensive evaluations have been conducted to verify the effectiveness of LaVi-Bridge. Code is available at https://github.com/ShihaoZhaoZSH/LaVi-Bridge.

Bridging LLMs and Vision Models for Text-to-Image Generation: An Analysis of LaVi-Bridge

The paper "Bridging Different LLMs and Generative Vision Models for Text-to-Image Generation" presents an innovative approach named LaVi-Bridge, which enables the integration of diverse pre-trained LLMs and generative vision models for effective text-to-image generation. This paper aims to address the increasing advancements and diversity in language and vision models, facilitating their combination without modifying original model weights.

Overview of LaVi-Bridge

LaVi-Bridge is designed as a bridge between varied language and vision models. Utilizing Low-Rank Adaptation (LoRA) and adapters, it injects these specialized components into both language and vision models, avoiding any alteration of the pre-trained weights. This enables the system to leverage advanced models from both domains (NLP and CV) seamlessly.

Key Features and Implementation

1. Model Flexibility and Structure Compatibility: LaVi-Bridge is versatile in supporting different architectures, including encoder-only (e.g., BERT, CLIP), encoder-decoder (e.g., T5), and decoder-only (e.g., Llama-2) LLMs, alongside U-Net and Transformer-based vision models like PixArt.
2. Plug-and-Play Design: By not altering the original model weights and utilizing LoRA, the framework facilitates integration with reduced computational resources, requiring relatively small datasets for effective training.
3. Empirical Validation: Through extensive evaluations, the paper demonstrates that integrating superior models within LaVi-Bridge enhances text alignment and image quality. Advanced LLMs such as Llama-2 show improved semantic understanding, while models like PixArt’s Transformer yield higher-quality images.

Experimental Insights

The paper provides a comprehensive experimental setup involving various language and vision model combinations. The results corroborate that the LaVi-Bridge framework can efficiently integrate different models, significantly enhancing the desired generation tasks. For example, the diffusion model utilizing Llama-2 exhibited exceptional semantic alignment, outperforming other models in text interpretation.

Additionally, the user paper results align with computational metrics, reinforcing the effectiveness of models integrated through LaVi-Bridge. The findings underscore the importance of selecting robust language and vision models to optimize text-to-image generation outcomes.

Future Implications

The ability to seamlessly connect and leverage advancements in language and vision models holds substantial promise for future AI developments. LaVi-Bridge allows researchers to explore state-of-the-art models across domains, amplifying operational capabilities in content creation, personalized media, and more. This framework sets the stage for exploring new frontiers in AI by dynamically adapting to ongoing advancements without substantial retraining costs.

Conclusion

By enabling the flexible integration of distinct language and vision models, LaVi-Bridge represents a significant contribution to the field of text-to-image generation. While it brings notable enhancements in semantic understanding and image quality, future work could explore scalability and integration with emerging AI models, potentially transforming applications across creative and technical domains. Given its versatile application and promising results, LaVi-Bridge presents itself as an essential tool for researchers and practitioners alike.