针对中文字识别难题,提出多模态字符定位与提取方法
Multi-Modal Character Localization and Extraction for Chinese Text Recognition
- 分三步:定位、并行提取、结合汉字结构识别
- 在多个中文数据集上显著超越现有方法
- 兼顾中英文识别,适合多语言场景应用
场景文本识别(STR)在英文文本图像上表现优异,但因汉字结构复杂、字数众多,识别难度大。近期研究发现,针对英文设计的模型在中文文本识别中面临准确率瓶颈。为此,我们提出新型方法LER,显式解耦每个汉字并独立识别,同时考虑汉字复杂内部结构。LER包含三个模块:定位模块利用多模态信息精确定位字符位置;提取模块并行分离所有字符;识别模块结合汉字独特结构生成文本预测结果。大规模中文基准测试表明,该方法显著优于现有方法。此外,在六个英文基准和Union14M数据集上的实验也展现出优异的英文文本识别性能。代码已开源。
原文摘要 · Abstract (English)
Scene text recognition (STR) methods have demonstrated their excellent capability in English text images. However, due to the complex inner structures of Chinese and the extensive character categories, it poses challenges for recognizing Chinese text in images. Recently, studies have shown that the methods designed for English text recognition encounter an accuracy bottleneck when recognizing Chinese text images. This raises the question: Is it appropriate to apply the model developed for English to the Chinese STR task? To explore this issue, we propose a novel method named LER, which explicitly decouples each character and independently recognizes characters while taking into account the complex inner structures of Chinese. LER consists of three modules: Localization, Extraction, and Recognition. Firstly, the localization module utilizes multimodal information to determine the character's position precisely. Then, the extraction module dissociates all characters in parallel. Finally, the recognition module considers the unique inner structures of Chinese to provide the text prediction results. Extensive experiments conducted on large-scale Chinese benchmarks indicate that our method significantly outperforms existing methods. Furthermore, extensive experiments conducted on six English benchmarks and the Union14M benchmark show impressive results in English text recognition by LER. Code is available at https://github.com/Pandarenlql/LER.
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