  Screen user interfaces (UIs) and infographics, sharing similar visual
language and design principles, play important roles in human communication and
human-machine interaction. We introduce ScreenAI, a vision-language model that
specializes in UI and infographics understanding. Our model improves upon the
PaLI architecture with the flexible patching strategy of pix2struct and is
trained on a unique mixture of datasets. At the heart of this mixture is a
novel screen annotation task in which the model has to identify the type and
location of UI elements. We use these text annotations to describe screens to
Large Language Models and automatically generate question-answering (QA), UI
navigation, and summarization training datasets at scale. We run ablation
studies to demonstrate the impact of these design choices. At only 5B
parameters, ScreenAI achieves new state-of-the-artresults on UI- and
infographics-based tasks (Multi-page DocVQA, WebSRC, MoTIF and Widget
Captioning), and new best-in-class performance on others (Chart QA, DocVQA, and
InfographicVQA) compared to models of similar size. Finally, we release three
new datasets: one focused on the screen annotation task and two others focused
on question answering.
