COMPUTER VISION

Decomposed evaluations of geographic disparities in text-to-image models

June 14, 2024

Abstract

Recent work has identified substantial disparities in generated images of different geographic regions, including stereotypical depictions of everyday objects like houses and cars. However, existing measures for these disparities have been limited to either human evaluations, which are time consuming and costly, or automatic metrics evaluating full images, which are unable to attribute these disparities to specific parts of the generated images. In this work, we introduce a new set of metrics, Decomposed Indicators of Disparities in Image Generation (Decomposed-DIG), that allows us to separately measure geographic disparities in the depiction of objects and backgrounds in generated images. Using Decomposed-DIG, we audit a widely used latent diffusion model and find that generated images depict objects with better realism than backgrounds and that backgrounds in generated images tend to contain larger regional disparities than objects. We use Decomposed-DIG to pinpoint specific examples of disparities, such as stereotypical background generation in Africa, struggling to generate modern vehicles in Africa, and unrealistically placing some objects in outdoor settings. Informed by our metric, we use a new prompting structure that enables a 52% worst-region improvement and a 20% average improvement in generated background diversity.

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AUTHORS

Written by

Abhishek Sureddy

Dishant Padalia

Nandhinee Periyakaruppa

Oindrila Saha

Adina Williams

Adriana Romero Soriano

Megan Richards

Polina Kirichenko

Melissa Hall

Publisher

Arxiv

Research Topics

Computer Vision

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