  Recently, diffusion-based image generation methods are credited for their
remarkable text-to-image generation capabilities, while still facing challenges
in accurately generating multilingual scene text images. To tackle this
problem, we propose Diff-Text, which is a training-free scene text generation
framework for any language. Our model outputs a photo-realistic image given a
text of any language along with a textual description of a scene. The model
leverages rendered sketch images as priors, thus arousing the potential
multilingual-generation ability of the pre-trained Stable Diffusion. Based on
the observation from the influence of the cross-attention map on object
placement in generated images, we propose a localized attention constraint into
the cross-attention layer to address the unreasonable positioning problem of
scene text. Additionally, we introduce contrastive image-level prompts to
further refine the position of the textual region and achieve more accurate
scene text generation. Experiments demonstrate that our method outperforms the
existing method in both the accuracy of text recognition and the naturalness of
foreground-background blending.
