Extremely low-light text images are common in natural scenes, making scene
text detection and recognition challenging. One solution is to enhance these
images using low-light image enhancement methods before text extraction.
However, previous methods often do not try to particularly address the
significance of low-level features, which are crucial for optimal performance
on downstream scene text tasks. Further research is also hindered by the lack
of extremely low-light text datasets. To address these limitations, we propose
a novel encoder-decoder framework with an edge-aware attention module to focus
on scene text regions during enhancement. Our proposed method uses novel text
detection and edge reconstruction losses to emphasize low-level scene text
features, leading to successful text extraction. Additionally, we present a
Supervised Deep Curve Estimation (Supervised-DCE) model to synthesize extremely
low-light images based on publicly available scene text datasets such as
ICDAR15 (IC15). We also labeled texts in the extremely low-light See In the
Dark (SID) and ordinary LOw-Light (LOL) datasets to allow for objective
assessment of extremely low-light image enhancement through scene text tasks.
Extensive experiments show that our model outperforms state-of-the-art methods
in terms of both image quality and scene text metrics on the widely-used LOL,
SID, and synthetic IC15 datasets. Code and dataset will be released publicly at
this https URL

提出了一种新的编码器 - 解码器框架，使用边缘感知的注意力模块来增强极低光条件下的文本图像，通过使用文本检测和边缘重建损失强调低层次的文本特征，实现了成功的文本提取和极低光图像增强。