  Despite impressive recent advances in text-to-image diffusion models,
obtaining high-quality images often requires prompt engineering by humans who
have developed expertise in using them. In this work, we present NeuroPrompts,
an adaptive framework that automatically enhances a user's prompt to improve
the quality of generations produced by text-to-image models. Our framework
utilizes constrained text decoding with a pre-trained language model that has
been adapted to generate prompts similar to those produced by human prompt
engineers. This approach enables higher-quality text-to-image generations and
provides user control over stylistic features via constraint set specification.
We demonstrate the utility of our framework by creating an interactive
application for prompt enhancement and image generation using Stable Diffusion.
Additionally, we conduct experiments utilizing a large dataset of
human-engineered prompts for text-to-image generation and show that our
approach automatically produces enhanced prompts that result in superior image
quality. We make our code and a screencast video demo of NeuroPrompts publicly
available.
