Handwriting remains an essential skill, particularly in education. Therefore, providing visual feedback on handwritten documents is an important but understudied area. We outline the many challenges when going from an image of handwritten input to correctly placed informative error feedback. We empirically compare modular and end-to-end systems and find that both approaches currently do not achieve acceptable overall quality. We identify the major challenges and outline an agenda for future research.

翻译：手写能力仍然是一项关键技能，在教育领域尤其如此。因此，为手写文档提供视觉反馈是一个重要但研究不足的领域。本文系统阐述了从手写输入图像到准确定位的信息化错误反馈过程中面临的多重挑战。我们通过实证对比模块化系统与端到端系统，发现目前两种方法均无法达到可接受的综合质量。我们明确了主要挑战，并为未来研究规划了方向。