Adapting Style And Content For Attended Text Sequence Recognition

In this paper, we address the problem of learning to perform sequential OCR on photos of street name signs in a language for which no labeled data exists. Our approach leverages easily-generated synthetic data and existing labeled data in other languages to achieve reasonable performance on these unlabeled images, through a combination of a novel domain adaptation technique based on gradient reversal and a multi-task learning scheme. In order to accomplish this, we introduce and release two new datasets - Hebrew Street Name Signs (HSNS) and Synthetic Hebrew Street Name Signs (SynHSNS) - while also making use of the existing French Street Name Signs (FSNS) dataset. We demonstrate that by using a synthetic dataset of Hebrew characters and a labeled dataset of French street name signs in natural images, it is possible to achieve a significant improvement on real Hebrew street name sign transcription, where the synthetic Hebrew data and real French data each overlap with different features of the images we wish to transcribe.